THE USE OF QUARRY DUST AS A PARTIAL REPLACEMENT OF SAND IN CONCRETE

Abstract

ABSTRACT This research work focused on the use of quarry dust as a partial replacement for sand in concrete production. The physical tests were carried out on the aggregates while workability tests on the fresh concrete were also carried out. 0, 25, 50, 75 and 100 percentage replacement of sand with quarry dust was use to cast concrete cubes for grade 20 concrete, the concrete cubes were cure for 28 days and their compressive strength was obtained by using crushing machine, from the results obtain it shows that at 100% sand replacement with quarry dust gives values of the compressive strength to be higher than that in the design mix target strength. The water absorption tests were also carried out on the cubes made from various mixes. The results shows increase in water absorption rate as the proportion of quarry dust increases in the concrete mix when compared with the control. The summary of the results obtained is as shown in table 4.6.6.