PREDICTION OF ASR EXPANSION OF FIELD-EXPOSED CONCRETE BASED ON ACCELERATED CONCRETE PRISM TEST WITH ALKALI-WRAPPING

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  • KAWABATA Yuichiro
    PORT AND AIRPORT RESEARCH INSTITUTE, Structural Mechanics Division
  • YAMADA Kazuo
    NATIONAL INSTITUTE FOR ENVIRONMENTAL STUDIES, Research Center for Material Cycles and Wastes Management
  • OGAWA Shoichi
    TAIHEIYO CONSULTANT CO., LTD., Sales & Marketing Department
  • SAGAWA Yasutaka
    KYUSHU UNIVERSITY, Faculty of Engineering

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  • アルカリラッピングしたコンクリートの促進膨張試験に基づく野外暴露コンクリートのASR膨張挙動の予測

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This paper presented the applicability of a new laboratory expansion test in which concrete specimens are wrapped with clothes or papers containing alkali solution in order to avoid alkali leaching and drying（AW-CPT；Concrete Prism Test with Alkali-Wrapping）. The temperature-dependency of ASR expansion was characterized with fitting by modelled equation. Then the expansion behaviour of field-exposed concrete block was calculated. The results strongly suggested that the predicted expansion behaviour based on AW-CPT was well agreed with one of field-exposed concrete, compared to conventional CPT. Future perspectives were also described.

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