Study Of Crushed Glass As Replacement Of Fine Aggregate In Concrete For Rigid Pavements

Abstract

 The uncompact voids content of a fine aggregate provides some general measure of its angularity and texture as voids content increases with angularity and decreases for a well-graded material. The voids content affects the concrete mix design and performance. A high voids content of aggregates typically requires more cement paste to provide the same workability for a given mix design

The voids content was determined according to BSEN1097-3 1998:(Tests for mechanical and physical properties of aggregates – Part 3). This test uses a sample of dry aggregate which is 1.2 to 1.5 times the mass of aggregate required to fill the test container. This container is filled to over flowing by resting the scoop on top of the rim of the container - this prevents aggregate segregation. Surplus aggregate is then removed from above the top of the container and the aggregate surface is levelled with a straight edge, taking care not to compact any part of the upper surface.