Limestone powder can be used for concrete as a partial replacement of Portland cement so that concrete becomes more environment-friendly construction material. One of the great applications of limestone powder added cement concrete might be a cement concrete pavement since the concrete pavement consumes massive quantity of Portland cement. However, it has been reported recently that Alkali-Silica Reaction (ASR) occurs on the cement concrete pavement causing a serious damage. This study investigates the resistance of limestone powder added cement mortar to ASR. The mortar used very high reactive silicious aggregate for accelerated ASR. Experimental procedures followed ASTM C 1260 and variables included different replacement levels of limestone powder in the mortar mix.

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