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A Simple Model for Predicting Expansion in Mortar Bars due to Alkali—Silica Reaction (Translation from Concrete Research and Technology JCI, Vol.3 No.1, 1992)

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CONCRETE LIBRARY OF JSCE NO. 20, DECEMBER 1992

A Simple Model for Predicting Expansion in Mortar Bars due to Alkali—Silica Reaction (Translation from Concrete Research and Technology JCI, Vol.3 No.1, 1992)

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Taketo UOMOTO Yasuhiko FURUSAWA

SYNOPSIS

An attempt has been made to present a kinetics—based model to predict the progress of alkali—silica reaction (ASR). The model incorporates the effect of such variable factors as size and reactivity of aggregate, alkalinity of cement matrix.

This model can simulate the observed expansion behaviors in mortar bars with different alkali content, and pessimum effects of reactive aggregate content on expansion. On the basis of the proposed model, the mecha—

nism of inorganic admixture in reducing the expansion in mortar bars due to ASR is also discussed in this paper . keywords: alkali aggregate reaction, model, kinetics, diffusion theory

T. Uomoto is a professor at the Institute of Industrial Science, University of Tokyo, Tokyo, Japan. He received his Doctor of Engineering Degree in 1981 from the University of Tokyo.

He specializes in composite materials for construction. His research interests cover the application of fiber- reinforced plastic to concrete structures, durability and freshness of concrete, diagnosis of concrete structures using nondestructive test methods and cement chemistry etc. He is a member of JSCE, JCI, ACI and JSNDI.

Y. Furusawa is a research engineer at Kajima Technical Research Institute, Kajima Corporation, Tokyo, Japan.

His research interests include durability and freshness of concrete, and cement chemistry. He is a member of JSCE and JCI.

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