Influence of some chemical admixtures on shrinkage of high performance mortar

Abstract

     High performance mortar has specific performance advantages over conventional mortar in restoring the concrete and reinforced concrete structures where the high compressive strength, cohesive strength and durability are necessary considered. But high performance mortar mixtures are usually produced with water/binder mass ratios (W/B) in the range of 0.2-0.4, and incorporate with highlyactive pozzolans such as silica fume (SF), fly ash (FA), and slag; so it cannot avoid the volume changes occur in mortar and concrete as a result of drying, self-desiccation, chemical reactions, and temperature change. Shrinkage and cracking are always the frequent properties in the research fieldconcrete, particularly early-age cracking is considered. This paper assessed the influence of some chemical admixtures on shrinkage of high performance mortar for two mixtures (W/B = 0.22 and 0.40).