Mitigating effect of fly ash on the asr-related expansion of mortar using reactive aggregate at the pessimum proportion

T. Ikeda, Y. Kawabata, Hidenori Hamada, K. Yamada

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

The limiting of alkali content in concrete is effective on mitigation of ASR and total alkali content in concrete are limited under 3kg/m3 in Na2Oeq in Japan. Flowever, ASR was evidenced in some structures in which alkali content was limited under 3kg/m3. One of the reasons why ASR was caused in limited alkali condition is considered as a pessimum phenomenon. This study focuses on the mitigating effect of fly ash on the ASR-related expansion of mortar using the reactive aggregate at the pessimum proportion. In this study, 3 types of andcsites were used as reactive aggregate. These aggregates had the pessimum proportion of 30% by mass at ccmcnt alkali of 1.20%. Thus, mitigating effect of fly ash was evaluated by mortar expansion test in which the reactive aggregate was mixed at the pessimum proportion and at 100% of total aggregate. As a result, the mitigating effect of fly ash with the replacement level of 20 vol.% became much less at the pessimum proportion than at 100% of reactive aggregate ratio. High replacement level of fly ash is expected to be demanded in the case of the pessimum condition.

本文言語英語
ホスト出版物のタイトルAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010
出版社Hokkaido University Press
ページ473-482
ページ数10
ISBN(印刷版)9784832903609
出版ステータス出版済み - 1 1 2010
イベント2nd International Conference on Durability of Concrete Structures, ICDCS 2010 - Sapporo, 日本
継続期間: 11 24 201011 26 2010

出版物シリーズ

名前Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010

その他

その他2nd International Conference on Durability of Concrete Structures, ICDCS 2010
Country日本
CitySapporo
Period11/24/1011/26/10

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Ocean Engineering
  • Building and Construction

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