Effect of aggregate produced by fly ash to replace natural sand to the properties of cement mortar

Abstract

This paper presents the results of investigation on the effect of fly ash granules to replace natural sand to the properties of cement mortar.  Mortar used fly ash granules size from 4.5 mm to 0.14 mm had better properties than mortar used fly ash granules size of less than 2.5 mm and the amount of particles below of 0.14 mm size was more than 25 % by weight.  The fly ash granules content to replace sand increased it achieve bulk density of mortar decreases, the water demand for the mortar increases due to the high porosity of fly ash granules. The mortar compressive strength at 28 days had equivalent control sample compressive strength, which used of 40% fly ash granules to replace natural sand. This research result is the first step to demonstrate the applicability used fly ash granules to replace natural sand for mortar and concrete.