EXPERIMENTAL STUDY OF ENGINEERED CEMENT COMPOSITES WITH PARTIAL REPLACEMENT OF FINE AGGREGATES BY GRANULATED BLAST FURNACE SLAG

ABSTRACT Bendable Concrete also known as Engineered Cementitious Composites (ECC) is a new class of FRC which has strain hardening property and multiple cracking behavior in Tension and Flexure. It is an Ultra ductile concrete which can be designed with strain capacity of about 3 percent to 5 percent compared to 0.01 percent of conventional concrete.To improve the ductile property of normal concrete, Poly Vinyl Alcohol (PVA) fibers is used in place of coarse aggregates.Since bendable concrete is relatively costlier than the conventional concrete it is still under experimental stage in India. This study investigates the possibility of utilizing granulated blast furnace slag(GBS) in bendable concrete as a substitute for partial fine aggregate to reduce the environmental problems relating to fine aggregate mining and waste disposal of slag. The use of GBS will also make the bendable concrete more economical to be used in India. This investigation focuses on the comparison of compressive strength and flexural strength of normal concrete with bendable concrete. The percentage of GBS replacement considered is 30%, 40%, 50%(%weight of binder) to fine aggregate for standard water cement ratio of 0.4. The optimum replacement of GBS is found to be 40% after the various tests that are carried out for bendable concrete. Keywords: PolyvinylAlcoholfiber (PVA), GBS,Engineered Cementitious Concrete(ECC),Bendable concrete.