Faculty Profiles - AYANO Toshiki

CRACKING DUE TO DRYING SHRINKAGE AND DRYING SHRINKAGE ANALYSIS BASED ON DIFFUSION THEORY Reviewed

KOBAYASHI Hitoshi, SAKIMOTO Tsutomu, FUJII Takashi, AYANO Toshiki, MIYAGAWA Toyoaki

Doboku Gakkai Ronbunshuu E 69 ( 4 ) 390 - 401 2013

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

There are a few cases that cracks occurred on PC structures at their young ages. It is judged that cracks were caused by large drying shrinkage of concrete. Drying shrinkage strain develops with the loss of moisture. When drying shrinkage is assumed to be constant at any position of cross section, it is impossible to simulate the crack due to drying shrinkage strain. The reason is that internal stress in concrete is developed by the difference of drying shrinkage between inside and outside of concrete. In order to examine the influence of the internal stress, the moisture distribution in concrete is calculated according to the diffusion equation. The analysis in this study targets to the PC bridge in site. As a result, it will be shown that internal stress of the PC bridge can be simulated and that the effect of drying shrinkage on the crack of the PC bridge can be presumed.

File： 69_390.pdf

DOI： 10.2208/jscejmcs.69.390

PREDICTION EQUATION OF DRYING SHRINKAGE STRAIN FOR CONCRETE Reviewed

Toshiki AYANO, Takashi FUJII, Yoshihiko TAIRA

Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures) 69 ( 4 ) 421 - 437 2013

IMPROVEMENT OF RESISTANCE TO SULFURIC ACID ATTACK OF CONCRETE BY USE OF BLAST FURNACE SLAG SAND Reviewed

Paweena JARIYATHITIPONG, Kazuyoshi HOSOTANI, Takashi FUJII, Toshiki AYANO

Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures) 69 ( 4 ) 337 - 347 2013

Study on Effective Stress Estimation Method for Concrete Members Reviewed

NIITANI Kyoji, WATASE Hiroshi, SAKATA Kenji, AYANO Toshiki

Concrete Research and Technology 20 ( 2 ) 27 - 37 2009.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Concrete Institute

Numbers of concrete structures have been constructed and they contribute to creation of infrastructures. It is important to know the stress of concrete acting on existing structures in order to maintain structures appropriately. However, it is difficult to know the actual stress for several reasons. The major reason is differences between the design stress conditions and the actual stress conditions. The causes are internal restrictions due to creep and shrinkage of concrete. In this study, the mechanisms of internal restrictions are investigated through various experiments on creep and shrinkage of concrete, and a new effective stress estimation method is proposed. The method is based on stress release technique. It can separate stresses caused by internal restriction from the total stress. Also, the accuracy of estimated stress has been improved by providing a specified measuring method. From verification tests using test specimens and actual structures, it was confirmed that the method is useful for setting maintenance level of structures.

File： 20_2_27.pdf

DOI： 10.3151/crt.20.2_27

Other Link： https://jlc.jst.go.jp/DN/JALC/00332275190?from=CiNii

Biofouling on Steel Slag Hydrated Matrix in Enclosed Coastal Area Reviewed

MATSUNAGA Hisahiro, TANISHIKI Kazuho, FUZII Takashi, AYANO Toshiki

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65 ( 1 ) 1196 - 1200 2009

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

Biofouling on a steel slag hydrated matrix using steel-making slag as the aggregate and ground granulated blast-furnace slag as the main binder was investigated in enclosed coastal areas, and was compared with that on concrete and a natural rocky shore. The steel slag hydrated matrix tended to display larger microalgal density and diversity than concrete from the initial period at the start of the test, confirming that microalgae readily grow on the steel slag-based material. At a seawall where large-scale works were executed, the biofouling on the steel slag hydrated matrix was equal or superior to that on the natural rocky shore. Based on these results, the steel slag hydrated matrix was judged to be excellent in biofouling performance.

File： 65_1196.pdf

DOI： 10.2208/kaigan.65.1196

DRYING SHRINKAGE, AUTOGENEOUS SHRINKAGE, THERMAL STRAIN AND ELASTIC STRAIN OF STEEL-MAKING SLAG CONCRETE Reviewed

State of Natural Aggregate in Chugoku-Shikoku Area Reviewed

AYANO T.

Concrete Journal 46 ( 5 ) 57 - 58 2008.5

FUJII Takashi, FUJIKI Akihiro, AYANO Toshiki, SAKATA Kenji

Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering) 63 ( 3 ) 468 - 484 2007.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

Steel-making slag concrete consists of by-products at ironworks. Steel-making slag concrete is expected as an environmentally friendly concrete. Steel-making slag concrete is used for foot protection block and small marine block, now. The purpose of this study is to enlarge the cover field of steel-making slag concrete productions. In this paper, elastic strain, thermal strain, autogeneous shrinkage strain and drying shrinkage strain of steel-making slag concrete are compared with those of normal cement concrete. Autogeneous shrinkage of steel-making slag concrete is very small due to high water absorption of steel-making slag, even when water to binder ratio of the concrete is quite small. Drying shrinkage strain at ultimate drying time of steel-making slag concrete is much bigger than that of normal cement concrete. Furthermore, drying shrinkage strain of steel-making slag concrete develops at a very low rate. They are due to the effect of high water absorption of steel-making slag. When drying shrinkage strain of steel-making slag concrete is predicted by JSCE model, water content in aggregate must be taken into consideration. On the other hand, Young's modulus, thermal expansion coefficient of steel-making slag concrete is as same as those of normal cement concrete. The effect of type of aggregate on those coefficients is small. As shown in this paper, the deformation of steel-making slag concrete can be predicted in design. It is possible to utilize the steel-making slag concrete in manufacturing of plain concrete structures such as large precast concrete armour unit or concrete block for retaining wall and revetment.

File： 63_468.pdf

DOI： 10.2208/jsceje.63.468

RESISTANCE TO FREEZING AND THAWING OF STEEL-MAKING SLAG CONCRETE AND THE IMPROVEMENT Reviewed

FUJII Takashi, FUJIKI Akihiro, AYANO Toshiki, SAKATA Kenji

Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering) 63 ( 2 ) 262 - 273 2007.5

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

Steel-making slag concrete consists of by-products at ironworks. The strength of steel-making slag concrete is 20-50 N/mm² at 28 days. Ground granulated blast furnace slag is used as a binder. Steelmaking slag is used as an aggregate. Steel-making slag concrete doesn't use any natural aggregate, either. The calcium hydroxide leaching from steel-making slag acts as alkali activator of ground granulated blast furnace slag. Steel-making slag concrete can be hardened by itself without any cement. Resistance to carbonation of steel-making slag concrete and resistance to corrosion of steel rod in steel-making slag concrete are high for a long time due to calcium hydroxide leaching from steel-making slag. However, resistance to freezing and thawing of steel-making slag concrete is quite low. In this paper, the mechanism of low resistance to freezing and thawing was clarified. The method to improve the durability of steel-making slag concrete was shown. An entrained air by AE agent is formed by calcium ion. The paste just with ground granulated blast furnace slag cannot contain entrained air by AE agent because enough calcium ions cannot be produced by the hydration with water and ground granulated blast furnace slag. Big size air is formed around steel-making slag because of calcium hydroxide leaching from the steel-making slag. That's why resistance to freezing and thawing is low. In order to improve the resistance to freezing and thawing of steel-making slag concrete, it's necessary to use cement, fly ash and blast furnace slag sand. Cement is used to entrain the air by AE agent. Fly ash is used to consume the extra calcium hydroxide in steel-making slag concrete. Blast furnace slag sand is used to restrain the calcium hydroxide leaching from sand. Then, the resistance to freezing and thawing of steel-making slag concrete is as high as that of AE cement concrete.

File： 63_262.pdf

DOI： 10.2208/jsceje.63.262

PREDICTION EQUATIONS OF CREEP AND DRYING SHRINKAGE STRAIN FOR WIDE-RANGED STRENGTH CONCRETE Reviewed

PREDICTION EQUATIONS FOR CREEP AND DRYING SHRINKAGE IN CONCRETE OF WIDE-RANGING STRENGTH Reviewed

Kenji Sakata, Tatsuya TSUBAKI, Shoichi INOUE, Toshiki Ayano

Concrete Library International 40 145 - 166 2002.10

Drying, moisture distribution, and shrinkage of cement-based materials Reviewed

T. Ayano, F. H. Wittmann

Materials and Structures 35 ( 3 ) 134 - 140 2002.4

SAKATA Kenji, TSUBAKI Tatsuya, INOUE Shoichi, AYANO Toshiki

Doboku Gakkai Ronbunshu 690 ( V-53 ) 1 - 19 2001.11

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

According to the enhanced performance of concrete and the generalization of high strength concrete, the model code is improved to cope with them. The prediction equations of creep and shrinkage for high strength concrete are also indispensable to the present model code.<br>In this study, the precision of the present prediction equations was examined by using some data bases. The reliable knowledge of the effect of concrete strength on creep and shrinkage was also derived from the data included in these data bases. New prediction equations proposed in this paper are very simple and available for wide-ranged strength concrete creep and shrinkage.

File： 2001_1.pdf

DOI： 10.2208/jscej.2001.690_1

MOISTURE DISTRIBUTION,DIFFUSION COEFFICIENT AND SHRINKAGE OF CEMENT-BASED MATERIALS Reviewed

AYANO Toshiki, SAKATA Kenji, Folker H. WITTMANN

Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures) 634 ( 634 ) 387 - 401 1999.11

STUDY ON NON-LINEAR CREEP PREDICTION EQUATION OF CONCRETE Reviewed

Kenji SAKATA, Toshiki AYANO

Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures) 451 ( 451 ) 179 - 188 1992.8

Study on creep strain of concrete under the various stress histories. Reviewed

SAKATA Kenji, AYANO Toshiki

Doboku Gakkai Ronbunshu 1992 ( 451 ) 205 - 214 1992.8

Language：Japanese Publisher：Japan Society of Civil Engineers

Most of widely-used creep analysis methods of concrete are on the basis of principle of superposition, and the creep coefficient used in the analysis is constant irrespective of subjected stress. Hence, the non-linear phenomena of creep are frequently neglected in the actual design. We clarify that the creep strain of concrete under the various stress histories is non-linear phenomena strongly affected by the maximum stress. When we treat creep as non-linear phenomena, we need creep hardening rule to calculate the creep strain under the changing stress. Many creep hardening rules have already proposed. For example, there are strain hardening rule, time hardening rule, work hardening rule and so on. These creep hardening rules are proposed for metal materials not for concrete. We will propose the creep hardening rule which can be applied to creep problem of concrete under any condition.

File： 1992_205.pdf

DOI： 10.2208/jscej.1992.451_205

Fatigue Life in Water Condition of Concrete with Blast Furnace Slag Sand Subjected to Freeze-Thaw Attack

高炉スラグ細骨材を用いたコンクリートの圧縮強度にカルシウムシリケート系硬化促進剤が与える影響 Reviewed

丁上, 森本充, 田中麟, 藤井隆史, 綾野克紀

コンクリート構造物の補修, 補強, アップグレード論文報告集 24 77 - 82 2024.10

The Effect of Calcium Silicate Type Accelerator on the Freeze-Thaw Resistance of Concrete Using Blast Furnace Slag Fine Aggregate Reviewed

Shang DING, Mitsuru MORIMOTO, Takashi FUJII, Toshiki AYANO

Proceedings of the Japan Concrete Institute 46 ( 1 ) 709 - 714 2024.6

Effect of treatment method of construction joint surface on adhesive strength of construction joints

Takashi FUJII, Hisashi ANDO, Isamu YAMAUCHI, Toshiki AYANO

Proceedings of the Japan Concrete Institute 46 ( 1 ) 283 - 288 2024.6

粗骨材の品質がコンクリートの乾燥収縮ひずみに与える影響 Reviewed

藤井隆史, 丁上, 谷口高志, 綾野克紀

コンクリート工学年次論文集 45 ( 1 ) 244 - 249 2023.6

Characteristics of concrete using granulated blast furnace slag sand from different manufacturers Reviewed

Proceedings of the Japan Concrete Institute 44 ( 1 ) 112 - 117 2022.6

Effect of freezing speed and freezing period on freeze-thaw resistance in salt water of mortar Reviewed

Proceedings of the Japan Concrete Institute 44 ( 1 ) 580 - 585 2022.6

Permeability of Concrete Using Granulated Blast Furnace Slag Reviewed

21 115 - 120 2021.10

セメント種類と養生方法がコンクリートの性能に与える影響 Reviewed

河中涼一, 藤井隆史, 綾野克紀

第29回プレストレストコンクリートの発展に関するシンポジウ論文集 273 - 278 2020.8

粗骨材がコンクリートの凍結融解抵抗性に与える影響 Reviewed

藤井隆史, Wang],L, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文集20 285 - 290 2020.8

CORROSION INHIBITION EFFECT OF CONCRETE WITH BLAST FURNACE SLAG SAND Reviewed

Takashi Fujii, Ryoichi Kawanaka, Toshiki Ayano

Advances in Construction Materials (Proceedings of ConMat'20) 2020.8

ポリプロピレン短繊維を添加したコンクリートの凍結融解抵抗性に関する研究 Reviewed

河中涼一, 田中湧麿, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 42 ( 1 ) 185 - 190 2020.7

セメントの種類が蒸気養生を行ったコンクリートの強度および凍結融解抵抗性に与える影響 Reviewed

王亮, 田中湧磨, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 42 ( 1 ) 701 - 706 2020.7

高炉スラグ細骨材を用いたコンクリートの鋼材腐食抑制効果に関する研究 Reviewed

藤井隆史,河中涼一,綾野克紀

コンクリート構造物の補修，補強，アップグレード論文集 19 279 - 284 2019.10

埋設型枠背面の空洞におけるとセメント系材料の補修方法に関する検討 Reviewed

水野剣一,谷口修,綾野克紀

コンクリート構造物の補修，補強，アップグレード論文集 19 2019.10

結合材の種類が高炉スラグ細骨材を用いたコンクリートの性能に与える影響 Reviewed

田中湧磨, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 41 ( 1 ) 65 - 70 2019.6

Study on PC slabs of concrete using blast-furnace slag aggregate Reviewed

65A 615 - 623 2019.3

高炉スラグ細骨材を用いたコンクリートの塩分浸透性と鋼材腐食に関する研究 Reviewed

綾野克紀, 中山敦郎, 藤井隆史

コンクリート構造物の補修，補強，アップグレード論文報告集 18 ( 6 ) 25 - 30 2018.10

高炉スラグ細骨材を用いたコンクリートの強度、収縮、クリープおよびアルカリシリカ反応抑制効果に関する研究 Reviewed

藤井隆史, 綾野克紀

コンクリート工学年次論文集 40 ( 1 ) 99 - 104 2018.6

DRYING SHRINKAGE STRAIN AND PORE SIZE DISTRIBUTION OF CONCRETE CURED AT HIGH TEMPERATURE Reviewed

Koki OISHI, Takashi FUJII, Toshiki AYANO

Cement Science and Concrete Technology (Japan Cement Association) 71 355 - 362 2018

高炉スラグがコンクリート中の鋼材腐食に与える影響 Reviewed

藤原斉, 中山敦郎, 藤井隆, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集 17 29 - 34 2017.10

Evaluation of Silicate-based Surface Impregnation by using Micro Cracking Concrete Specimen Reviewed

Toshiki Ayano, Takashi Fujii, Masahiro Yamamoto, Hisashi Ando

Proceedings of The 8th International Conference on Water Repellent Treatment and Protective Surface Technology for Building Materials (Hydrophobe VIII) 180 - 186 2017.10

Effect of curing and admixture on freeze-thaw resistance of BFS concrete Reviewed

Takashi Fujii, Mamoru Yamauchi, Toshiki Ayano

Proceedings of ICCM2017 320 ( 22 ) 2017.10

The effect of granulated blast furnace slag on chloride diffusivity of concrete Reviewed

Takashi Fujii, Hitoshi Fujiwara, Toshiki Ayano

ADVANCES IN CONSTRUCTION MATERIALS AND SYSTEMS (Proceedings of an International Conference (ICACMS 2017)) 3 361 - 368 2017.9

Toshiki AYANO, Takashi FUJII

Journal of the Society of Materials Science, Japan 66 ( 8 ) 588 - 593 2017.8

Experimental and numerical investigation of static and fatigue behavior of mortar with blast furnace slag sand as fine aggregates in air and water Reviewed

Muhammad Aboubakar Farooq, Yasuhiko Sato, Toshiki Ayano, Kyoji Niitani

Construction and Building Materials 143 429 - 443 2017.7

高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与える養生方法および増粘剤の影響 Reviewed

山内守, 野口光明, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 39 ( 1 ) 829 - 834 2017.6

高炉スラグ細骨材がコンクリートのフレッシュ性状に及ぼす影響 Reviewed

浦野真次, 田中博一, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 39 ( 1 ) 1267 - 1272 2017

高炉スラグ細骨材を用いたプレキャスト部材の研究開発 Reviewed

綾野克紀, 二井谷教冶, 細谷多慶, 高橋克則

プレストレストコンクリート 59 ( 6 ) 80 - 85 2017

高炉スラグ細骨材を用いたコンクリート床版の輪荷重走行疲労試験 Reviewed

杉田篤彦, 二井谷教治, 藤井隆, 綾野克紀

第25回プレストレストコンクリートの発展に関するシンポジウム論文集 167 - 172 2016.10

5年間実環境に曝露したPC上部工の実物大供試体における乾燥収縮ひずみ Reviewed

小林仁, 河中涼一, 藤井隆, 綾野克紀

第25回プレストレストコンクリートの発展に関するシンポジウム論文集 ( 4 ) 547 - 550 2016.10

STATIC AND FATIGUE BEHAVIOR OF MORTAR USING BLAST FURNACE SLAG FINE AGGREGATES IN WATER Reviewed

Muhammad Aboubakar Farooq, Yasuhiko Sato, Toshiki Ayano, Takashi Fujii

EASEC-14, the fourteenth East Asia - Pacific Conference on Structural Engineering and Construction 1268 - 1273 2016.1

EFFECT OF GROUND GRANULATED BLAST FURNACE SLAG AND FLY ASH ON RESISTANCE TO FREEZING AND THAWING OF CONCRETE WITH BLAST FURNACE SLAG SLAD

FUJII Takashi, AYANO Toshiki

Cement Science and Concrete Technology 70 ( 1 ) 355 - 362 2016

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Cement Association

<p>This paper shows the effect of ground granulated blast furnace slag and fly ash on freeze-thaw resistance of concrete with blast furnace slag sand. When granulated blast furnace slag sand is used as sand, the high resistance to freezing and thawing action can be expected even if AE agent is not used. Concrete with 50％ of water to cement ratio keeps over 90％ of relative dynamic modulus of elasticity till 300 cycles of freezing and thawing action regardless of period of curing. In the case of using ground granulated blast furnace slag as a part of the binder of the concrete with granulated blast furnace slag sand, by performing sufficient wet curing, the high-resistance to freezing and thawing can be expected same as using just ordinary portland cement. On the other hand, in the case of using a fly ash in a part of the binder of the concrete with granulated blast furnace slag sand, enough resistance to freezing and thawing cannot be obtaining even if cured in water until the age of 91days. In order to exhibit the effect of improving the freeze-thaw resistance by granulated blast furnace slag sand, the selection of a suitable admixture and sufficient wet curing are important.</p>

File： 70_355.pdf

DOI： 10.14250/cement.70.355

高炉スラグ細骨材を用いたコンクリートのスケーリングに与える粒度分布の影響 Reviewed

山内守, 中溝翔, 藤井隆史, 綾野克紀

コンクリート工学年次論文集（日本コンクリート工学会） 38 ( 1 ) 963 - 968 2016

高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与える結合材および養生の影響 Reviewed

杉田篤彦, 白川輝, 藤井隆史, 綾野克紀

コンクリート工学年次論文集（日本コンクリート工学会） 38 ( 1 ) 969 - 974 2016

高炉スラグを用いたコンクリートの中性化、塩化物イオン浸透性および電気抵抗性に関する研究 Reviewed

藤井隆史, 堀水紀, 藤原斉, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集（日本材料学会） 16 2016

PRACTICAL APPLICATION OF PRECAST CONCRETE MEMBER WITH SUPER-HIGH DURABILITY CONCRETE Reviewed

Toshiki Ayano, Takashi Fujii, Katsunori Takahashi, Kyoji Niitani, Kazuyoshi Hosotani

Proceedings of EASEC-14 S3,464 2016

Improvement of durability of concrete by granulated blast furnace slag sand

Takashi Fujii, Atsuhiko Sugita, Toshiki Ayano

Sustainable Construction Materials and Technologies 2016- 2016

Effect of sand and binder to chemical resistance of mortar and concrete Reviewed

T. Fujii, T. Ayano, P. Jariyathitipong, K. Hosotani

Life-Cycle of Structural Systems 1663 - 1670 2015.1

緻密化した高炉徐冷スラグ粗骨材を用いたコンクリートの強度および変形特性に関する研究 Reviewed

白川輝, 藤井隆史, 高橋克則, 綾野克紀

コンクリート工学年次論文集 37 ( 1 ) 79 - 84 2015

高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与えるブリーディングの影響 Reviewed

藤井隆史, 中溝翔, 細谷多慶, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集（日本材料学会） 15 106 - 104 2015

高炉スラグを用いたコンクリートの中性化，塩化物イオン浸透性および時間依存性変形に関する研究 Reviewed

藤井隆史, 細谷多慶, 杉田篤彦, 綾野克紀

コンクリート工学年次論文集 37 ( 1 ) 637 - 642 2015

超高耐久プレストレストコンクリート部材の実験的研究 Reviewed

杉田篤彦, 二井谷教治, 綾野克紀, 藤井隆史

第24回プレストレストコンクリートの発展に関するシンポジウム論文集 747 - 752 2015

RESISTANCE TO FREEZING AND THAWING OF CONCRETE WITH GRANULATE BLAST FURNACE SLAG SAND Reviewed

Fujii, T, Sugita, A, Ayano, T

Proceedings of the Fifth International Conference on Construction Materials(Conmat’15) 1331 - 1338 2015

EFFECT OF COPPER COMPOUNDS AND ZINC COMPOUNDS ON SETTING OF MORTAR Reviewed

UENAKA Kazumasa, SAITO Tadashi, FUJII Takashi, AYANO Toshiki

Cement Science and Concrete Technology 68 ( 1 ) 164 - 170 2014

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Cement Association

The drying up of the natural aggregate resources becomes the problem. The slag is an industrial by-product attracts attention as substitute aggregate. Ferro-nickel slag and copper slag are made a standard in Japan Industrial standard（JIS）as concrete aggregate. But the slag is hardly used on the construction site. The slag contains many type heavy metals. There is possibility that heavy metals in the slag retard cement hydration. Therefore, it is necessary to know the effect that heavy metals give on hydration of cement for utilization of slags as concrete aggregate. This paper shows retardation effects of four kinds of copper compounds and four kinds of zinc compounds on setting of mortar. Basic copper carbonate, copper（Ⅰ）oxide, copper（Ⅱ）oxide, copper（Ⅱ）sulfate pentahydrate, zinc oxide, zinc nitrate hexahydrate, basic zinc carbonate and zinc sulfide were used. It was found that setting retardation effect of each compound was different according to the form of the metal salt. Basic copper carbonate had highest effect of setting retardation in four kinds of copper compounds. And zinc oxide had highest effect of setting retardation in four kinds of zinc compounds. In addition, basic copper carbonate and zinc oxide had more high setting retardation effect. In this paper, it was shown that using basic copper carbonate and zinc oxide together caused 20 days delay of setting times of mortar.

File： 68_164.pdf

DOI： 10.14250/cement.68.164

RESISTANCE TO FREEZING AND THAWING ON CONCRETE WITH BLAST FURNACE SLAG UNDER CHLORIDE ATTACK ENVIRONMENT Reviewed

高炉スラグ細骨材によるコンクリートの凍結融解抵抗性改善に関する研究 Reviewed

森雅聡, 藤井隆史, Paweena JARIYATHITIPONG, 綾野克紀

コンクリート工学年次論文集 36 ( 1 ) 1078 - 1083 2014

JARIYATHITIPONG Paweena, FUJII Takashi, HOSOTANI Kazuyoshi, AYANO Toshiki

Cement Science and Concrete Technology 67 ( 1 ) 427 - 433 2014

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Cement Association

It has been found that when the steam-curing method is used, even AE concrete with a lower water to cement ratio as 40％ cannot provide acceptable resistance to freeze and thaw. In this study, the compressive strength and the freezing and thawing resistance of concrete, containing ground granulated blast furnace slag as a binder and granulated blast furnace slag sand as a fine aggregate, has been investigated. Several mixtures of concrete with different water to binder ratios and ground granulated blast furnace slag to binder ratios, as well as mixtures with and without the AE agent, have been experimented upon. The curing method is also one of the control parameters in this investigation. The results show that the freezing and thawing resistance of concrete can be improved by using granulated blast furnace slag as a part of the binder. Moreover, the freezing and thawing resistance can be improved greatly when granulated blast furnace slag sand is also used as a fine aggregate. Furthermore, not only the freezing and thawing resistance of normal concrete is improved, but the freezing and thawing resistance of non AE agent concrete and steam-curing method concrete is improved as well.

File： 67_427.pdf

DOI： 10.14250/cement.67.427

SETTING RETARDATION PROPERTY OF MORTAR USING INORGANIC COMPOUND

コンクリートの乾燥収縮ひずみに及ぼす養生時の温度履歴の影響 Reviewed

藤井隆, 大石幸紀, 沖花智之, 綾野克紀

コンクリート工学年次論文集 36 ( 1 ) 490 - 495 2014

FREEZING AND THAWING RESISTANCE OF CONRETE WITH BLAST FURNACE SLAG Reviewed

Takashi Fujii, Toshiki Ayano

Proceedings of the International Conference Non-Traditional Cement & Concrete V 53 - 56 2014

Cracking Control Technology for Concrete Using Urea Reviewed

H. Tanaka, T. Ayano

Concrete Journal 52 ( 4 ) 303 - 308 2014

A study of drying shrinkage for securing durability of PC bridge Reviewed

Ryoichi Kawanaka, Hitoshi Kobayashi, Tsutomu Sakimoto, Toshiki Ayano, Toyoaki Miyagawa

3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 T4-8 4 377 - 389 2013.8

Effect of chemical admixture on property of fresh mortar using sludge water Reviewed

Takashi Fujii, Tadashi Saito, Toshiki Ayano

3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 e030 2013.8

Strength and durability of concrete with blast furnace slag Reviewed

Paweena Jariyathitipong, Kazuyoshi Hosotani, Takashi Fujii, Toshiki Ayano

3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 e029 2013.8

モルタルの硫酸浸食速度に及ぼす配合および養生の影響 Reviewed

田中俊光, 古澤貴治, 藤井隆史, 綾野克紀

セメントコンクリート論文集 66 223 - 228 2013

有機系混和剤を添加したスラッジ水を用いたモルタルのフレッシュ性状改善効果とその評価方法に関する研究 Reviewed

斉藤忠, 高田元気, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 35 ( 1 ) 217 - 222 2013

THE SULFURIC ACID RESISTANCE OF CONCRETE WITH BLAST FURNACE SLAG Reviewed

Paweena Jariyathitipong, Kazuyoshi Hosotani, Takashi Fujii, Toshiki Ayano

Proceeding of First International Conference on Concrete Sustainability (ICCS13) 581 - 586 2013

コンクリートの耐久性に及ぼす高炉スラグ細骨材の影響

藤井隆, Paweena Jariyathitipong, Kazuyoshi Hosotani, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集 13 1 - 6 2013

UENAKA Kazumasa, SAITO Tadashi, FUJII Takashi, AYANO Toshiki

Cement Science and Concrete Technology 67 ( 1 ) 203 - 209 2013

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Cement Association

This study relates to retardation effects of some inorganic compounds on a set of cement mortar. Zinc oxide, Basic zinc carbonate, Copper（Ⅰ）oxide, Copper（Ⅱ）oxide and Basic copper carbonate were used as an inorganic set retarder. Additionally, mixtures of those compounds were tested to examine a combination effect. It was found that retardation effect of zinc compounds was bigger than that of copper compounds. The difference of retardation effect between the zinc compounds was small. And the difference of retardation effect between the copper compounds was also small. Using basic copper oxide and zinc oxide together made the retardation effect bigger than single use of zinc oxide or basic copper carbonate. Particularly, in the case of using a mixture of zinc oxide and basic copper oxide in the ratio of 2：1 by mass, setting of mortar was retarded up to about 10th day. Remixing the mortar shortened the set time, that is to say, decreased the retardation effect. Compressive strength of the mortar at the 28th day was comparable to that of plain mortar. It means those retarders do not affect on the compressive strength at such an age.

File： 67_203.pdf

DOI： 10.14250/cement.67.203

DURABILITY OF CONCRETE WITH LOW-HEAT PORTLAND BLAST FURNACE SLAG CEMENT AND BLAST FURNACE SLAG FINE AGGREGATE Reviewed

Measurement of drying shrinkage strain with full-scale test specimens for a PC box girder Reviewed

Hitoshi Kobayashi, Tsutomu Sakimoto, Takashi Fujii, Toshiki Ayano, Toyo Miyagawa

fib Symposium TEL-AVIV 2013: Engineering a Concrete Future: Technology, Modeling and Construction, Proceedings 161 - 164 2013

速硬性混和剤を用いたコンクリートの生コンクリート工場での実用化に関する研究

鳴川拓志, 森上廣茂, 寺石文雄, 藤井隆史, 綾野克紀

第17回生コン技術大会研究発表論文集 7 - 12 2013

Application of Concrete with Urea to RC Rigid Frame Viaduct Reviewed

TANAKA H., ISHIMOTO H., NODA H., AYANO T.

Concrete Journal (Tokyo. 1963) 50 ( 8 ) 689 - 694 2012.8

繰返し荷重下における鉄筋付鋼製型枠床版の底鋼板の剥落防止に関する研究 Reviewed

古澤貴治, 佐野洋次, 藤原斉, 綾野克紀

コンクリート工学年次論文集 34 ( 1 ) 415 - 420 2012

スラッジ水を用いたモルタルのフレッシュ性状に及ぼす化学混和剤の効果 Reviewed

藤井隆史, 斉藤忠, 高田元気, 綾野克紀

コンクリート工学年次論文集 34 ( 1 ) 160 - 165 2012

微細なひび割れを持つコンクリート試験体の作製方法とそれを用いたひび割れ補修材の性能確認試験方法に関する研究 Reviewed

Masahiro Yamamoto, Naru Tanimura, 藤井隆, Hisashi Ando, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集 12 467 - 472 2012

浅切り方式によるコア応力解放法の提案とその適用性 Reviewed

渡瀬博, 二井谷教治, 高橋聖二, 石田真知, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集 12 49 - 54 2012

鉄筋付鋼製型枠床版の鉄筋防食効果と底鋼板の剥離対策に関する研究 Reviewed

Takaharu Furusawa, Hirotsugu Sano, Hitoshi Fujiwara, 藤井隆, 綾野克紀

コンクリート構造物の補修，補強，アップグレード論文報告集 12 89 - 94 2012

尿素を用いたひび割れ低減コンクリートの開発 Reviewed

田中博一, 根本浩史, 橋田浩, 河井徹, 綾野克紀

セメント・コンクリート ( 775 ) 18 - 23 2011.9

CRACK OF RC BEAM WITH STEEL-MAKING SLAG CONCRETE Reviewed

Yui OZEKI, Takashi FUJII, Hisahiro MATSUNAGA, Toshiki AYANO

Cement Science and Concrete Technology 64 ( 64 ) 515 - 521 2011.2

FUJII Takashi, DAN Yasuhiro, JARIYATHITIPONG Paweena, AYANO Toshiki

Cement Science and Concrete Technology 65 ( 1 ) 413 - 419 2011

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Cement Association

Low-heat Portland blast furnace slag cement is the cement which raised a ratio of the ground granulated blast furnace slag and reduced the specific surface area of cement by blaine. When Portland blast furnace slag cement is used by binder, the temperature rise of concrete is lower than that of using ordinary Portland cement. In the case that low-heat Portland blast furnace slag cement is used by binder, the temperature rise of concrete is more low that of using Portland blast furnace slag cement which the specific surface area of cement by blaine is high. In the case of using Portland blast-furnace slag cement which raised a ratio of the ground granulated blast furnace slag, compressive strength and carbonation of concrete are worse than that of using ordinary Portland cement. However, sulfuric acid attack resistance is higher than that of using ordinary Portland cement. And in the case of using blast furnace slag sand together, resistance of sulfuric acid attack is more high. In addition, the drying shrinkage strain of concrete with Portland blast furnace slag cement and blast furnace slag sand is smaller than that of using ordinary Portland cement and crushed sand. And in the case that concrete with Portland blast furnace slag cement and blast furnace slag sand cured in stream, the drying shrinkage strain becomes small more.

File： 65_413.pdf

DOI： 10.14250/cement.65.413

Application of low shrinkage concrete using urea to actual structure Reviewed

Hirokazu TANAKA, Toru KAWAI, Hiroaki NODA, Toshiki AYANO

Proceedings of the Japan Concrete Institute 33 ( 1 ) 491 - 496 2011

A Study on Influence of Quality of Fly Ash on Characteristics of Fly Ash Reviewed

Kazuyuki TAKAHASHI, Tadashi SAITOH, Takashi FUJII, Toshiki AYANO

Concrete Proceedings of the Japan Concrete Institute 33 ( 1 ) 965 - 970 2011

Effect of Gypsum and Curing to Drying Shrinkage of Concrete with Low-Heat Portland BFS Cement Reviewed

Takashi FUJII, Yasuhiro DAN, Kazuyoshi HOSOTANI, Toshiki AYANO

Proceedings of the Japan Concrete Institute 33 ( 1 ) 503 - 508 2011

Mechanical properties of sulfuric acid resisting cement composites containing blast furnace slag applied for precast concrete products Reviewed

Satoru Matsuoka, Makoto Kawakami, Toshiki Ayano

Zairyo/Journal of the Society of Materials Science, Japan 59 ( 10 ) 757 - 762 2010.10

Rapid test of drying shrinkage strain of concrete Reviewed

Takashi TANIGUCHI, Jun-ichi WATANABE, Takashi FUJII, Toshiki AYANO

Proceedings of the Concrete Structure Scenarios 10 249 - 254 2010

Practical Application of Cement Composites Containing Ground Blast Furnace Slag for Precast Concrete Products Reviewed

Satoru MATSUOKA, Kazuyoshi HOSOTANI, Toshiki AYANO, Makoto KAWAKAMI

Proceedings of the Concrete Structure Scenarios 10 221 - 228 2010

銅スラグのコンクリート用材料への有効利用に関する研究 Reviewed

渡辺純一, 田村裕美, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 32 ( 1 ) 1535 - 1540 2010

硫酸環境下におけるコンクリートの耐久性設計に関する研究 Reviewed

西野隆, 藤井隆史, 細谷多慶, 綾野克紀

コンクリート工学年次論文集 32 ( 1 ) 659 - 664 2010

RESISTANCE OF CONCRETE WITH GRANULATED BLAST FURNACE SLAG SAND TO SULPHURIC ACID ATTACK Reviewed

Toshiki Ayano, Hisahiro Matsunaga, Takashi Fujii

ADVANCES IN CONCRETE STRUCTURAL DURABILITY: PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON DURABILITY OF CONCRETE STRUCTURES ICDCS2010 3 449 - 456 2010

PC橋上部工における部材内部の湿度移動に着目した応力解析 Reviewed

河中涼一, 小林仁, 藤井隆史, 綾野克紀

第19回プレストレストコンクリートの発展に関するシンポジウム論文集 509 - 514 2010

高炉水砕スラグを用いたセメント硬化体のプレキャストコンクリート製品への実用化に関する研究 Reviewed

松岡智, 細谷多慶, 綾野克紀, 川上洵

コンクリート構造物の補修，補強，アップグレード論文報告集 10 221 - 228 2010

鉄鋼スラグ水和固化体の各種耐久性に関する研究 Reviewed

松永久宏, 藤井隆, 綾野克紀

コンクリート工学年次論文集 32 ( 1 ) 1529 - 1534 2010

Effect of type of fine aggregate on the resistance of concrete to sulfuric acid attack Reviewed

T. Ayano, T. Fujii

Proceedings of the 6th international conference on concrete under severe conditions (consec'10), 2 803 - 811 2010

A new stress estimation method considering time-dependent behavior of concrete Reviewed

K. Niitani, H. Watase, K. Sakata, T. Ayano

Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures 1197 - 1203 2009.12

EFFECT OF TYPE OF FINE AGGREGATE ON THE RESISTANCE OF MORTAR TO SULPHURIC ACID ATTACK Reviewed

Toshiki Ayano, Takashi Fujii, Kenji Sakata

Concrete Durability and Service Life Planning – ConcreteLife’09 213 - 220 2009.9

高炉水砕スラグを用いたセメント硬化体の耐硫酸性に関する研究 Reviewed

藤井隆史, 細谷多慶, 松永久宏, 綾野克紀

コンクリート工学年次論文集 31 ( 1 ) 847 - 852 2009

RESISTANCE OF CONCRETE WITH GRANULATED BLAST FURNACE SLAG SAND TO SULFURIC ACID ATTACK Reviewed

Toshiki Ayano, Hisashiro Matsunaga, Takashi Fujii, Kenji Sakata

Proceedings of ConMat'09 4th International Conference on Construction Materials: Performance, innovations and Structural Implications 2 921 - 926 2009

Solidification Technology for Incineration Ash Using Cement Materials

Suzuki Kazuyuki, Fujii Takashi, Ayano Toshiki, Ono Yoshiro

Journal of the Japan Society of Material Cycles and Waste Management 20 ( 5 ) 320 - 331 2009

Durability of concrete with blast furnace slag Reviewed

Takashi FUJII, Takashi NISHINO, Kazuyoshi HOSOTANI, Toshiki AYANO

Proceedings of the Concrete Structure Scenarios 9 57 - 62 2009

鉄鋼スラグ水和固化体の強度発現性に及ぼすアルカリ刺激材の影響 Reviewed

松永久宏, 藤井隆史, 綾野克紀

コンクリート工学年次論文集 31 ( 1 ) 1831 - 1836 2009

ESTIMATION OF EFFECTIVE PRESTRESS OF PRESTRESSED CONCRETE MEMBERS Reviewed

H. Watase, K. Niitani, Toshiki Ayano, Kenji Sakata

Proceedings of ConMat'09 4th International Conference on Construction Materials: Performance, innovations and Structural Implications 2 1143 - 1148 2009

Drying shrinkage of steel-making slag concrete Reviewed

T Fujii, T Ayano, K Sakata

Proceeding on 33rd Conference on Our World In Concrete & Structures 179 - 184 2008

モルタルの耐硫酸性に細骨材の種類が及ぼす影響 Reviewed

綾野克紀, 小河内誠, 藤井隆史, 入矢桂史郎

コンクリート工学年次論文集 30 ( 2 ) 559 - 564 2008

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

本論文は,モルタルの耐硫酸性に及ぼす細骨材の影響を示したものである。セメントには,普通ボルトランドセメントおよび水和反応によって生じる水酸化カルシウムの生成量を抑制する耐酸性セメントを使用した。川砂を細骨材に用いた場合には,耐酸性セメントを用いることで,モルタルの耐硫酸性が著しく向上する。一方,高炉スラグ細骨材を用いた場合には,セメントの種類による影響は小さく,高い耐硫酸性を示すことを明らかとした。

File： 030-01-2094.pdf

細骨材の種類が鉄鋼スラグ水和固化体の耐久性に及ぼす影響 Reviewed

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10641457

高炉スラグを用いたモルタルの耐硫酸性に関する研究 Reviewed

藤井隆史, 小河内誠, 綾野克紀, 阪田憲次

コンクリート構造物の補修，補強，アップグレード論文報告集 Vol.8 65 - 70 2008

Drying shrinkage of recycled concrete Reviewed

Ayano,Toshiki, Fujii,Takashi, Sakata,Kenji

Creep, shrinkage and durability mechanics of concrete and concrete structures ( 1 ) 805 - 810 2008

藤井隆史, 春田正一, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 30 ( 2 ) 493 - 498 2008

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

本論文は,細骨材の種類が鉄鋼スラグ水和固化体の耐久性に及ぼす影響を示したものである。製銅スラグを細骨材に用いた鉄銅スラグ水和固化体は,普通コンクリートに比べて,圧縮強度,中性化,塩化物イオンの浸透性および耐硫酸性が劣る。これに対して,細骨材に高炉スラグを用いた鉄鋼スラグ水和固化体は,圧縮強度の増加は小さいものの,中性化,塩化物イオンの浸透性および耐硫酸性は改善されることが明らかとなった

File： 030-01-2083.pdf

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10641446

APPLICATION OF DISCARDED LIMESTONE POWDER INCLUDING CALCIUM FLUORIDE TO SELF-COMPACTING HIGH PERFORMANCE CONCRETE Reviewed

Liang Wang, Akihiro Tasaka, Takashi Fujii, Toshiki Ayano

62 550 - 556 2008

Effect of aluminum hydroxide on control of alkali-aggregate reaction Reviewed

Akina Ishii, Takashi Fujii, Jun-Ichi Watanabe, Koji Kataoka, Toshiki Ayano

Zairyo/Journal of the Society of Materials Science, Japan 56 ( 8 ) 736 - 741 2007.8

鉄鋼スラグ水和固化体の変形特性に関する研究 Reviewed

赤本淳, 藤井隆史, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 29 ( 2 ) 493 - 498 2007.7

鉄鋼スラグ水和固化体の耐薬品性に関する研究 Reviewed

藤井隆史, 藤木昭宏, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 29 ( 2 ) 499 - 504 2007.7

FREEZING AND THAWING RESISTANCE OF STEEL-MAKING SLAG CONCRETE Reviewed

Takashi Fujii, Toshiki Ayano, Kenji Sakata

Journal of Environmental Science for Sustainable Society 1 1 - 10 2007.1

水酸化アルミニウムを用いたコンクリートの耐久性に関する研究 Reviewed

田中誠司, 片岡宏治, 渡辺純一, 綾野克紀

コンクリート工学年次論文集 29 ( 1 ) 493 - 498 2007

電気炉酸化スラグを用いた耐酸性補修モルタルに関する研究 Reviewed

藤井隆史, 小河内誠, 綾野克紀, 阪田憲次

コンクリート構造物の補修，補強，アップグレード論文報告集 Vol.7,pp.185~190 2007

RESISTANCE TO FREEZING AND THAWING OF STEEL-MAKING SLAG CONCRETE Reviewed

Toshiki Ayano, Takashi Fujii, Kenji Sakata

Proceeding of consec'07 Concrete Under Server Conditions Environment and Loading 717 - 724 2007

Steel making slag concrete as sustainable construction materials Reviewed

K. Sakata, T. Ayano, T. Fujii

Proceedind of Special Sessions 131 - 141 2007

DIFFUSION OF CHLORIDE IONS IN CEMENT-BASED MATERIAL Reviewed

Toshiki Ayano, Kazuyoshi Hosotani, Kentaro Yamamoto, Kenji Sakata

Proceeding on International RILEM-JCI Seminar on Concrete Durability and Service Life Planning ConcreteLife'06 33 - 40 2006.3

最近のコンクリート工学進歩の動向 Reviewed

綾野克紀

セメント・コンクリート ( 718 ) 44 - 48 2006

ケイ酸ナトリウム系補修材がコンクリートの打継ぎ面の付着強度に及ぼす影響 Reviewed

藤井隆史, 安藤尚, 綾野克紀, 阪田憲次

コンクリート構造物の補修，補強，アップグレード論文報告集 2006

鉄鋼スラグ水和固化体の凍結融解抵抗性改善に関する研究 Reviewed

藤井隆史, 藤木昭宏, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 28 ( 1 ) 1607 - 1612 2006

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

鉄鋼スラグ水和固化体は,通常のセメントコンクリートと同等の強度発現が可能でありながら,凍結融解抵抗性が劣る場合があることも知られている。鉄鋼スラグ水和固化体は,骨材に用いた溶銑予備処理スラグから溶出するカルシウムイオンにより高炉スラグ微粉末が刺激され硬化する。AE剤を用いても凍結融解抵抗性が劣る原因を本研究では明らかとする。凍結融解抵抗性を改善するには,結合材の一部をセメントとすること,細骨材にカルシウムイオンの溶出の少ない高炉スラグ細骨材を用いることが適当であること,多量に生成される水酸化カルシウムをポゾラン材料で消費させる必要があることを示す。

File： 028-01-1265.pdf

製鋼スラグの吸水率が鉄鋼スラグ水和固化体の耐久性に及ぼす影響 Reviewed

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10640059

DURABILITY IMPROVEMENT OF STEEL-SLAG CONCRETE Reviewed

Toshiki Ayano, Takashi Fujii, Kenji SAKATA

Kenji Sakata Symposium on Properties of Concrete 269 - 284 2006

BEHAVIOR OF RC SLABS USING SHORT FIBER COMPOSITE MATERIALS UNDER STATIC AND DYNAMIC LOADING Reviewed

Mahmoud Abo, El-Wafa Ahmed, Toshiki Ayano, Kenji Sakata

Proceeding of The Eighth East Asia-Pacific Conference on Structural Engineering & Construction 2005.12

DURABILITY IMPROVEMENT OF STEEL-MAKING SLAG CONCRETE Reviewed

Toshiki AYANO

Proc. int. Workshop on Durability of Reinforced Concrete under Combined Mechanical and Climatic Loads (CMCL) 251 - 259 2005.10

Effect of dosage of pigment on the surface color of concrete Reviewed

Takashi Fujii, Akihiro Fujiki, Hidekazu Tanaka, Toshiki Ayano

Zairyo/Journal of the Society of Materials Science, Japan 54 ( 8 ) 810 - 815 2005.8

Effect of pH on strength and durability of steel-slag hydrated matrix Reviewed

Toshiki Ayano, Takashi Fujii, Kenji Sakata

Proceedings ConMat '05 3 - 5 2005.8

Creep Prediction Model and the State of the Art Reviewed

AYANO T.

43 ( 5 ) 51 - 55 2005.5

再生骨材の吸水率が再生コンクリートの強度および耐久性に及ぼす影響

綾野克紀

コンクリートテクノ 24 ( 3 ) 52 - 57 2005.3

コンクリート中の塩化物イオンの拡散および固定化の予測に関する研究 Reviewed

細谷多慶, 森脇拓也, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 27 ( 1 ) 685 - 690 2005

藤井隆史, 藤木昭宏, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 27 ( 1 ) 1423 - 1428 2005

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

鉄鋼スラグ水和固化体は,通常のコンクリートと同程度の性能が発現可能な,副産物を利用した建設材料である。しかし,使用するスラグ骨材の品質によっては耐久性が劣る場合がある。鉄鋼スラグ水和固化体の性能を改善することを目的に,吸水率を下げた溶銑予備処理スラグを骨材として使用した。鉄鋼スラグ水和固化体の硬化後の性能に及ぼす影響を実験により確認した。とくに,耐凍害性は,吸水率の低い溶銑予備処理スラグを用いることで,エントレインドエアが連行されやすくなり,著しい改善効果が得られることを確認した。

File： 027-01-1231.pdf

コンクリート中の微細なひび割れが塩分浸透性に及ぼす影響 Reviewed

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10639408

劣化したコンクリートの塩分浸透性に関する研究 Reviewed

綾野克紀, 細谷多慶, 森脇拓也, Kenji SAKATA

コンクリート構造物の補修，補強，アップグレード論文報告集 4 143 - 148 2004.10

Resistance to cracking due to drying shrinkage by polypropylene fibers Reviewed

Kenji Sakata, Toshiki Ayano

6TH CANMET/ACI INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN CONCRETE TECHNOLOGY 133 - 146 2004.3

廃ガラスのコンクリート用材料としての有効利用に関する研究 Reviewed

藤井隆史, 田中秀和, 綾野克紀, 阪田憲次

セメント･コンクリート論文集 57 584 - 591 2004.2

Durability of Concrete with Recycled Aggregate Reviewed

Toshiki Ayano, Ryoichi Kawanaka, Kenji Sakata

Sever Conditions of Environment and Loading 1 117 - 124 2004.1

細谷多慶, 森脇拓也, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 26 ( 1 ) 1011 - 1016 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

コンクリートには,劣化に伴って微細なひび割れが発生する。従って,コンクリートの塩化物イオン浸透性はその劣化とともに変化する。本研究では,乾燥および凍結融解作用によって劣化したコンクリートの塩分浸透性を調べた。種々の浸せき期間における塩化物イオン量分布を測定し,新しい塩化物イオン拡散係数の算定式を提案した。

File： 026-01-1160.pdf

再生骨材を用いた自己充填コンクリートの二次製品への適用 Reviewed

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10638663

馬場政教, 河中涼一, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 26 ( 1 ) 1545 - 1550 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

再生骨材を用いた自己充填コンクリートの二次製品への適用を目的とし,再生骨材が自己充填コンクリートの流動性,強度および耐久性に及ぼす影響を調べた。その結果,再生骨材を用いても,高性能減水剤の添加量を増やすことで自己充填コンクリートを製造することが可能であることが分かった。コンクリートの強度および耐久性は,コンクリートの単位水量と再生骨材中に含まれる吸水量の和によって説明できることが分かった。再生骨材に含まれる吸水量を考慮することにより,二次製品に要求される力学的性能を満たす製品が製造できることを示す。

File： 026-01-1249.pdf

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10638752

Resistance to Cracking by the Incorporation of Polypropylene Fibers Reviewed

Kenji SAKATA, M.Yabuki, Toshiki AYANO

6TH CANMET/ACI INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN CONCRETE TECHNOLOGY 2004

鉄鋼スラグ水和固化体のpHが強度および耐久性に及ぼす影響 Reviewed

藤井隆史, 田中秀和, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 26 ( 1 ) 1653 - 1658 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

鉄鋼スラグ水和固化体は,製鉄所の副産物である高炉スラグ微粉末および製鋼スラグを主な原料とし,必要に応じてアルカリ刺激材等を添加して製造される。本研究によって,鉄鋼スラグ水和固化体の強度は,水粉体比の他に,練混ぜ直後のpHにも依存することが分かった。さらに,練混ぜ直後のpHをセメントコンクリートと同程度にすることで,強度のばらつきが小さく,安定して鉄鋼スラグ水和固化体を製造できることが分かった。また,鉄鋼スラグ水和固化体の耐中性化および耐鉄筋腐食性は,製鋼スラグのアルカリ性によって,長期にわたって高い性能を示すことが分かった。

File： 026-01-1267.pdf

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10638770

Strength and durability of steel-slag hydrated matrix without cement Reviewed

Takashi Fujii, Toshiki Ayano, Kenji Sakata

Proc. of the 29th Conference on Our World in Concrete & Structures 253 - 258 2004

再生骨材の吸収率が再生コンクリートの強度および耐久性に及ぼす影響 Reviewed

河中涼一, 出口雄亮, 馬場政教, 綾野克紀

コンクリート工学年次論文集 25 ( 1 ) 1283 - 1288 2003.7

乾燥下における高強度モルタルの収縮挙動に関する研究 Reviewed

蔵本修, 森脇拓也, 綾野克紀, 阪田憲次

コンクリート工学年次論文集 25 ( 1 ) 503 - 508 2003

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

PC構造物における設計自由度の拡大,部材の軽量化,高耐久性などを目的として高強度コンクリートはますますその重要性を高めている。しかしながら,コンクリートの高強度化に伴い,若材令時の収縮によるひびわれが問題となっている。高強度コンクリートの収縮ひずみを予測する場合,自己収縮の影響が大きくなる。本研究では,高強度モルタルの自己収縮ひずみの挙動を把握し,高強度コンクリートにも適用できる収縮ひずみ予測手法を提案する。

File： 025-01-1078.pdf

1028 形状寸法の異なるビニロン繊維の混合効果に関する研究(短繊維コンクリート) Reviewed

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10637908

Evaluation and Comparison of Sealed and Non-sealed Shrinkage of High Strength Concrete Reviewed

T. Ayano, O. Kuramoto, K.SAKATA

6TH CANMET/ACI INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN CONCRETE TECHNOLOGY 2003

Mixing Effect of Different Sizes of Synthetic Fibers on Concrete Reviewed

K.SAKATA, M. A. EL-Wafa, T. Ayano

6TH CANMET/ACI INTERNATIONAL CONFERENCE ON DURABILITY OF CONCRETE 2003

Fire resistance of polypropylene fiber reinforce concrete Reviewed

Masuo Yabuki, Mahmoud Abo El-Wafa Ahmed, Toshiki Ayano, Kenji Sakata

Zairyo/Journal of the Society of Materials Science, Japan 51 ( 10 ) 1123 - 1128 2002.10

Effects of particle-size characteristics of limestone powder on flowability of self-compacting high performance concrete Reviewed

Masanori Baba, Ryou Oh, Ryouichi Kawanaka, Toshiki Ayano, Kenji Sakata

Zairyo/Journal of the Society of Materials Science, Japan 51 ( 10 ) 1099 - 1104 2002

CHARACTERISTICS FIBER COMPOSITE CONCRETE AT HIGH TEMPERATURES Reviewed

Mahmoud Abo El-WafaAhmed, Masuo Yabuki, Kenji Sakata, Toshiki Ayano

The First fib Congress 2002 Concrete Structures in the 21 century 2002

EVALUATION AND COMPARISON OF SEALED AND NON-SEALED SHRINKAGE OF HIGH STRENGTH CCONCRETE Reviewed

Osamu Kuramoto, Toshiki Ayano, Abo El-Wafa, Kenji Sakata

The First fib Congress 2002 Concrete Structures in the 21 century 2002

EXPERIMENTAL STUDY ON STABLE PRODUCTION OF SELF-COMPACTING HIGH PERFORMANCE CONCRETE Reviewed

Hiroto Arima, Masayoshi Sadakane, Toshiki Ayano, Kenji Sakata

The First fib Congress 2002 Concrete Structures in the 21 century 2002

綾野克紀, 斉藤忠, Abo El-Wafa Mahmoud, 阪田憲次

コンクリート工学年次論文集 24 ( 1 ) 213 - 218 2002

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本コンクリート工学協会

本論文は,ビニロン繊維の混入効果が,コンクリート断面に存在するビニロン繊維の総表面積と高い関係にあることを示したものである。このことに基づけば,異なる寸法のビニロン繊維を混合した場合の方が,同じ寸法のもののみを混入した場合よりも,あるコンクリート断面に存在する繊維の総表面積は広くなり,ビニロン繊維の混入効果も高くなる。この混合効果を,コンクリートの割裂強度,乾燥収縮ひび割れに対する抵抗性および繰返し荷重下におけるRC部材のひび割れ進展抑制効果で確認した。

File： 024-01-1028.pdf

Influence of Coarse Aggregate on the Shrinkage of Normal and High-Strength Concretes

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10637275

CRACKING CONTROL OF CONCRETE STRUCTURES UTILIZING FIBER COMPOSITE MATERIALS

Mahmoud Abo El-Wafa, Toshiki Ayano, Osamu Kuramoto, Kenji Sakata

Third Middle East Symposium on Structural Composites for Infrastructure Applications 2002

EFFECT OF CRACKING ON SERVICEABILITY OF FIBROUS CONCRETE

Toshiki Ayano, Mahmoud Abo, El-Wafa Ahmed, Kenji Sakata

Proceeding of the 10th International Conference on Fracture, ICF10069 2001.12

ポリプロピレン繊維によるコンクリートの補強効果に関する研究 Reviewed

綾野克紀, Mahmoud Abo, El-Wafa Ahmed, 矢吹増男, 阪田憲次

複合劣化コンクリート構造物の評価と維持管理計画に関するシンポジウム論文集 73 - 78 2001.3

Adam Ihab, Sakata Kenji, Ayano Toshiki

Journal of the Faculty of Environmental Science and Technology,Okayama University 6 ( 1 ) 41 - 45 2001.2

炭酸銅を用いたコンクリートの遅延特性に関する研究 Reviewed

吉川寛和, 綾野克紀, 阪田憲次

コンクリート工学年次論文報告集 23 ( 2 ) 91 - 96 2001

Influence of coarse aggregate on the creep of normal and high-strength concretes Reviewed

Adam, I, T Ayano, K Sakata, O Kuramoto

2001 SECOND INTERNATIONAL CONFERENCE ON ENGINEERING MATERIALS, VOL II 173 - 182 2001

Resistance to cracking due to drying shrinkage by polypropylene fiber Reviewed

T Ayano, MA El-Wafa, M Yabuki, K Sakata

2001 SECOND INTERNATIONAL CONFERENCE ON ENGINEERING MATERIALS, VOL I 705 - 712 2001

Concrete with Copper Slag Fine Aggregate (Specoal Issue on Aggregates and Admixtures for Concrete) Reviewed

AYANO Toshiki, KURAMOTO Osamu, SAKATA Kenji

Journal of the Society of Materials Science, Japan 49 ( 10 ) 1097 - 1102 2000.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Materials Science, Japan

Copper slag is a by-product yielded from a copper refinery. The annual amount of copper slag in Japan is two million tons. The copper slag has been used for cement material, sand blasting, reclamation and so on. However, most of the copper slag is stacked high as waste since the production exceeds demand. This study on the application of copper slag as fine aggregater for concrete has been started with the expecation of large amounts of consumption. Many researchers have already found it possible to use a copper slag as a concrete aggregate. However, it also has been clear that the concrete with copper slag has some problems. One of them is excess bleeding attributed to the glassy surface of copper slag. Another problem is the delay of setting time of concrete with copper slag nevertheless it produced at the same refinery. The delay of setting time is more than one week in some cases although the durability in concrete is not affected by it. In this paper, the strength, setting time and durability of concrete with copper slag is clarified. It is shown that the delay of setting time does not have a negative influence on durability. Furthermore, the solution will be given in this paper.

File： 49_1097.pdf

DOI： 10.2472/jsms.49.1097

The use of physical phenomena to predict time effects in cracked reinforced concrete beams

Other Link： https://jlc.jst.go.jp/DN/JALC/00070328325?from=CiNii

Factors affecting creep and shrinkage of high-strength concrete : Part Ⅱ Reviewed

Adam I, Toshiki Ayano, Kenji Sakata

the 8th Arab Structural Engineering Conference 2000.8

Resistance to Cracking by Drying Shrinkage of Concrete with Polypropylene Fiber Reviewed

AYANO Toshiki, SAKATA Kenji, YABUKI Masuo, HOSODA Tsunemasa

22 ( 2 ) 325 - 330 2000.6

Durability of concrete with copper slag fine aggregate Reviewed

T. Ayano, K. Sakata

American Concrete Institute, ACI Special Publication SP-192 141 - 157 2000.4

Improvement of concrete with recycled aggregate Reviewed

Kenji Sakata, Toshiki Ayano

American Concrete Institute, ACI Special Publication SP-192 1089 - 1108 2000.4

Effct of Ambient temperature and Humidity on Creep and Shrinkage of Concrete Reviewed

Kenji Sakata, Toshiki Ayano

American Concrete Institute, ACI Special Publication SP-194 215 - 235 2000

Creep of high-strength concrete incorporating different coarse aggregates

Adam, I, Ayano, T, Sakata, K

7th International Conference for Building and Construction 2000

Influence of Silica Fume on the Creep and Shrinkage of High-Strength Concrete Reviewed

ADAM Ihab, AYANO Toshiki, SAKATA Kenji

22 ( 2 ) 619 - 624 2000

MOISTURE DISTRIBUTION, DIFFUSION COEFFICIENT, AND SHRINKAGE OF CEMENT-BASED MATERIALS Reviewed

Toshiki Ayano, Kenji Sakata, Folker H. Wittmann

CONCRETE LIBRARY INTERNATIONAL 36 207 - 226 2000

再生細骨材を用いたコンクリートの耐久性に関する研究 Reviewed

綾野克紀, 阪田憲次, 大地勝

セメント・コンクリート論文集 53 559 - 565 1999.12

2143 Study on Diffusion Coefficient for Concrete Reviewed

AYANO Toshiki, SAKATA Kenji

21 ( 2 ) 853 - 858 1999.7

粗骨材の品質がコンクリートの乾燥収縮およびクリープに及ぼす影響 Reviewed

セメント・コンクリート論文集 52 656 - 661 1998.10

M. A. Rahman, T. Ayano, K. Sakata

Magazine of Concrete Research 50 ( 3 ) 219 - 227 1998.9

Language：English Publishing type：Research paper (scientific journal) Publisher：Thomas Telford Ltd.

A method of calculating the time effects on cracked reinforced concrete (RC) members, based on actual physical phenomena, is presented. The redistribution of stress due to the migration of the neutral axis, and the consequent elastic and creep recovery are included in the calculation using the method of time-discretization. A simplified multiplier derived from the initial/time-dependent curvature, which is a function of the long-term strain factor, is used to calculate the time-dependent deflection. The concrete non-linear creep model established on axially loaded specimens is modified by introducing a parameter to account for the steel restraining effect on the creep deformation of RC flexural member. The modified model also considers the effect of the compression of the steel on the creep of the RC member. The calculated values are compared with laboratory measured values for several test beams of different cross-sectional properties reported in the literature. The proposed method gives results that are in good agreement with experimental results.

File： macr.1998.50.3.219.pdf

DOI： 10.1680/macr.1998.50.3.219

PCに関する試験および測定入門講座(8)PCのクリ-プ測定・乾燥収縮測定 Reviewed

Effect of Temperature and Relative Humidity on Concrete Creep and Shrinkage Reviewed

Kenji Sakata, Toshiki Ayano

ACI: Recent Advances in Concrete Technology SP 179-59 1043 - 1058 1998.6

Diffusion and Shrinkage of Self-Compacting High Performance Concrete Reviewed

Toshiki Ayano, Kenji Sakata

ACI: Sixth CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete SP-178 559 - 570 1998

外気の温度および湿度が変化する下でのコンクリートのクリープ予測 Reviewed

セメント・コンクリート論文集 51 808 - 811 1997.12

Effect of admixture on properties of Self-Compacting High Performance Concrete Reviewed

Toshiki Ayano, Kenji Sakata

ACI: 5th CANMET/ACI International Conference on Superplasticizer and Other Chemical Admixtures in Concrete SP-173 297 - 310 1997.10

Time-effect on the flexural cracks under service load

Atiqure Rahman, Toshiki Ayano, Kenji Sakata

Proc. of the 22th Conference on Our World in Concrete&Structures 299 - 306 1997.8

綾野克紀

プレストレスト・コンクリ-ト 39 ( 4 ) 109 - 114 1997.7

Prediction of the effect of temperature on shrinkage of concrete Reviewed

Kenji Sakata, Toshiki Ayano

International Conference on Engineering Materials 647 - 657 1997.6

1116 Concrete Shrinkage Strain under the Actual Atmosphere Reviewed

AYANO Toshiki, SAKATA Kenji

19 ( 1 ) 709 - 714 1997.6

Time-Dependent Deformation Analysis of RC Member Considering Non-Linearity of Concrete Creep : Reviewed

M.A. Rahman, AYANO Toshiki, SAKATA Kenji

Proceedings of the Japan Concrete Institute 19 ( 1 ) 781 - 786 1997.6

Language：Japanese Publishing type：Research paper (scientific journal)

This paper focuses on the applicability of the non-linear concrete creep law in the time-dependent deformation analysis of reinforced concrete members. To calculate the creep strain of flexural member using the creep law established on the axially loaded specimen, a parameter is introduced to account the steel restraining effect. In numerical calculation the method of time-discretization is used. The non-linear creep response is calculated due to the stress acting in an individual time-step and successively added. The present method gives better agreement with the experimental results in compare to the conventional methods of prediction.

File： 019-01-1128.pdf

Influence of urea in concrete Reviewed

Shaaban Mwaluwinga, Toshiki Ayano, Kenji Sakata

Cement and Concrete Research 27 ( 5 ) 733 - 745 1997.5

Study of mix design method for self-compactable high performance concrete with lime stone powder Reviewed

Kenji Sakata, Toshiki Ayano

Zairyo/Journal of the Society of Materials Science, Japan 45 ( 9 ) 993 - 1000 1996.9

Study on the Durability of Low Heat Highly Flowable Concrete Incorporating Urea Reviewed

Kenji Sakata, Toshiki Ayano

High Strength/High Performance Concrete-BHP96 1333 - 1339 1996.3

高流動コンクリートに関する技術の現状と課題 Reviewed

綾野克紀

土木学会,コンクリート技術シリーズ ( 15 ) 169 - 177 1996

1023 Study on Properties of Low Heat and Highly Flowable Concrete : Reviewed

MWALUWINGA Shaaban, AYANO Toshiki, KAMETAKA Seiji, SAKATA Kenji

17 ( 1 ) 139 - 144 1995.6

Language：English Publishing type：Research paper (scientific journal)

The purpose of this study is to develop the concrete which has both properties of low heat and high flowability. The high flowability is to guarantee the durability of concrete without any compactions. Low heat of hydration is to apply this concrete into mass concrete constructions. hi this paper, the results of the experiment conducted to investigate the flowability, heat of hydration, setting times and strength of low heat and highly flowable concrete will be discussed.

File： 017-01-1023.pdf