EVALUATING THE PERFORMANCE OF SUSTAINABLE INTERLOCKING CONCRETE BLOCKS MANUFACTURED FROM RECYCLED CONCRETE AGGREGATE

Abstract

This paper aims to investigate the possibility of using construction and demolition concrete wastes (C&D) in the production of recycled aggregate, which in turns will be used in the production of interlocking concrete blocks. Five groups of concrete mixtures have been prepared and tested with different proportions of recycled aggregates (0%, 25%, 50%, 75% and 100%). A series of tests (density, compressive strength, flexural strength and ultrasonic test) conducted on concrete cubes and concrete blocks to select best proportion of recycling concrete aggregate (RCA) to produce recycled aggregate concrete. The best proportion of RCA was 25%. This proportion was selected to evaluate the performance of interlocking concrete blocks pavement through studying the influence of block shape, thickness, laying pattern and jointing sand based on static plate loading test.