Micro-mechanical modelling for the prediction of alkali-silica reaction (ASR) expansion: Influence of curing temperature conditions

Abstract The alkali-silica reaction causes long-term degradation of microstructure of cement paste and aggregate, and as results in macroscopic expansion. In this paper, a micro-mechanical expansion model was developed coupling with the damage and thermodynamic theory. First of mortar thermal coefficients were estimating to determine the true expansion due to ASR based on EPMA and MIP results and expansion proposed in this paper were compared with analysis results of Suwito’s and Multon’s model. The results indicate that the increasing of temperature conducted reduced fluctuations of ASR expansion coefficient of cement paste. In addition, our proposed model accurately reproduces the true-dependency of expansion due to ASR with the lowest error. Overall, the proposed microscopic expansion model is able to apply for numerical analyse of deteriorated due to ASR concrete structure designs with in the deterioration of ASR in the future.

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