Faculty Profiles - AYANO Toshiki

Papers - AYANO Toshiki

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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

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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

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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

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

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

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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