IMPACT TEST ON RECYCLED COARSE AGGREGATE BASED SELFCOMPACTING CONCRETE

Abstract

Self-compacting concrete (SCC) is a highly flowable type of concrete that spreads into the form without the
need for vibration. SCC is a non-segregating concrete that is placed by means of its own weight. SCC requires
considerably more quantity of fine particle as compared to traditional concrete to achieve self-compactibility. Reused
Aggregate is called as Recycled Coarse Aggregate (RCA) which is mainly obtained by crushing concrete of
demolished concrete structures. In this study, Nan-Su method of mix design is employed to obtain mix-proportions for
SCC and two grades of concrete mixes were used. This study aims to evaluate the impact resistance of SCC by
replacing NCA with different percentages of RCA (25%, 50%, 75%, 100% ) in unprocessed and various processed
states(500R, 1000R, 1500R, 2000R). For mix-A at 75% replacement of RCA and 1000 revolutions, for mix-B at 75%
replacement of RCA and 500 revolutions maximum impact resistance was found.