Faculty Profiles - AYANO Toshiki

Papers - AYANO Toshiki

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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

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

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

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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

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

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

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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

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分離低減剤の種類が高流動コンクリートの諸性質に及ぼす影響 Reviewed

阪田憲次, 綾野克紀

セメントコンクリート論文集 49 ( 49 ) 498 - 503 1995.6

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