Effect of lime water on the properties of silica fume blended cementitious composite

摘要

This study is to investigate the setting time and strength properties of cementitious composite mortars blended with silica fume by the replacement of 10, 20 and 30% of cement with two types of lime water. Concurrently, cement pastes for each of the above mix proportion are prepared to study the hydration kinetics by using XRD analysis. The ordinary potable water has been completely replaced with two types of lime water for all the samples except control samples. The results of setting time experiments show that there is a considerable reduction in the initial and final setting times for both the cases of lime water and silica fume blended cement pastes compared to control sample. The lime water with ionic level suspension tends to increase the compaction and early strength of the mortars. Though the lime waters without silica fume reduces the strength of mortars, the specimens with silica fume and lime water tends to show increase in compressive and split tensile strengths, influenced by the binary blended cementitious composites which improves both early strength and later strengths.