Comparative Study of Fly-ash Based with Bentonite Based Recycled Aggregate Concrete

Abstract

Concrete as a building material has taken over the world during the last few decades. It is also evident that with the increase in use, the demand is increasing and supply is shrinking day by day due to excessive use of material. Our biggest challenges now are competition against time, economy and limiting material resources. One of the waste materials that has been widely in use in the rest of the world is recycled aggregate. Although the production of the recycled aggregate in Pakistan is not that much high as in rest of the world but if we do not take the steps now then it will become a concern in near future. The purpose of this research study is to produce economical concrete by developing two types of concrete mixes, i.e. incorporating recycled aggregate and fly ash as partial substitution of coarse aggregate and cement respectively, and incorporating recycled aggregate and bentonite as partial substitution of coarse aggregate and cement respectively. This exploration is a challenge to carry out an evaluation of the mechanical properties such as strength and workability of concrete, containing fly ash, using recycled aggregates, and bentonite based concrete using recycled aggregate. Also, to make a comparative study of natural aggregate concrete with fly-ash based RAC, and bentonite based RAC having same mix design compressive strength.