SOME STUDIES ON RECYCLED AGGREGATE CONCRETE WITH AND WITHOUT POLYMER

摘要

Buildings are demolished due to various reasons i. e reconstruction for better economic gains, obsolescence due to deterioration on structural performance, natural disasters and war-inflicted damages. The rate of demolition is increasing day by day and at the same time, the cost of dumping is increasing due to non-availability of appropriate site nearby. Besides scarcity of land, other problems associated with the landfill option include their silting; transportation costs, tipping fees and public opposition. Thus, recycling has been gaining wider attention as a viable option for handling of waste concrete. The recycled aggregate concrete is continued for last two decades in India. Polymer modified concrete is finding its application in various fields of construction viz., liquid retaining structures, thin shells, precast wall panels etc. because of improvement in strength and deformation characteristics as compared to normal concrete. From the experimental investigation on recycled aggregate, it is found that strength viz., compressive strength, flexural strength & split tensile strength was increased up to 10%, 40% & 35% respectively by adding 7.50% polymer by weight with respect to weight of cement. An attempt is made in this paper to use only 2% of monobond type polymer by weight with respect to weight of cement so as to compare with normal concrete.