EFFECT OF HIGH RANGE WATER REDUCERS (HRWR) ON THE PROPERTIES AND STRENGTH DEVELOPMENT CHARACTERISTICS OF FRESH AND HARDENED CONCRETE

Abstract

Research is underway to increase the strength of concrete with the addition of chemicaland mineral admixtures. The use of High Range Water Reducers (HRWR) has been increasedmany times in the last two decades. In this research the effect of two types of commerciallyavailable HRWR (Superplasticizers) are studied on the properties of concrete in fresh andhardened state. The strength development characteristics of concrete have been studied with theaddition of the HRWR. The research has shown the selection of appropriate HRWR for the desiredresults of concrete in fresh and hardened state is a critical decision for the performance of theWRWR.