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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010
PublisherHokkaido University Press
Pages473-482
Number of pages10
ISBN (Print)9784832903609
Publication statusPublished - Jan 1 2010
Event2nd International Conference on Durability of Concrete Structures, ICDCS 2010 - Sapporo, Japan
Duration: Nov 24 2010Nov 26 2010

Publication series

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

Other

Other2nd International Conference on Durability of Concrete Structures, ICDCS 2010
CountryJapan
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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