THE EFFECT OF COARSE AGGREGATE SHAPE ON THE PROPERTIES OF CONCRETE

Abstract

In plain concretes coarse aggregates amongst other constituents of concrete are known to contribute the highest in terms of strength and volume although its shape tends to affect the property of both fresh and hardened concrete. This paper investigates the effect of aggregate shape on properties of plain concrete. Four shapes of aggregates were considered- irregular, round, flaky and angular. Concrete cubes having dimensions of 150×150×150 mm were cast and cured for 7, 14, 21 and 28days and their fresh and hardened properties were determined. From the slump test results it was observed that the round shape aggregate has the highest workability 36.67mm and also the compressive strength of the angular shape aggregate at 28 days is the highest with 20.60N/mm2.