“STRENGTH AND DURABILITY STUDY OF CONCRETE USING PARTIALLY REPLACED RECYCLED FINE AND COARSE AGGREGATES ALONG WITH SILICA FUME”

Abstract

To support the goal of “SAVE ENVIRONMENT”, today’s need is to use recycled
materials as maximum as possible. As Concrete is the most demanded material after water in present
developing countries. There is need of present globe to find the alternative materials for ingredients
of concrete which can replace natural ingredients especially aggregates. Earlier researchers have
presented good results of concrete using recycled coarse aggregates. Here an attempt is made to
prepare concrete using recycled coarse aggregates as well as fine aggregates. Coarse aggregates
have been replaced in percentages of 0,50 and 100 while fine aggregates will be replaced as
10%and 20%. 10% Silica fumes has also been used to improve the properties of the said concrete.
Three grade viz. M40, M50 and M60 of Concrete have been prepared with and without silica fume
to avail detailed study. The analysis is based on compressive strength and durability criteria.
Comparative analysis of Fresh and Hardened properties of normal concrete and concrete using
replacement of recycled coarse and fine aggregates along with and without silica fume has been
carried out, which shows that initially the replacement of recycled aggregates alone decreases the
strength. The result of compressive strength shows that replacement of coarse aggregate 50%, the
reduction in strength is 9 to 12% while for 100% the reduction in strength is 22 to 30%