알칼리.실리카반응에 의한 팽창의 모델화 ( A Model for Simulating the Expansion of Alkaki-Silica Reaction )

A model for simulating the expansion of mortar bar due to alkali-silica reaction is presented. This model is based upon the mechanisms of alkali-silica reaction proposed by S.Diamond and experimental results. This model can be apply to the mortar or concrete containing a reactive constituent in the aggregate which is not readily accessible to hydroxyl ions, for example, volcanic glass, cristobalite and tridymite in the andesite. This model predicts correctly the pessimum content for given mortar mix proportion with certain alkali content and the expansion of mortar bar with time.