IMPROVEMENT SOME OF CEMENT MORTAR PROPERTIES CONTAINING NANO METAKAOLINE OR RICE HUSKS ASH

Abstract

The research aim is to know the improvement extent of some mortar properties like compressive,tensile and flexural strength for the partial substitution of mortar cement by the natural pozzolanic materials of high activity as Nano metakaoline or rice husks ash at ratios of 2%, 3%, 4%, 5% and 6% of its cement weight. Research requirement are (205) samples, (25) samples for reference cement paste standard consistency with initial & final setting time and reference mortar compressive , tensile and flexural strength. (180) Samples are the mixed cement mortar samples for compressive , tensile and flexural strength as per the above substitution ratios for ages of (3) and (7) days. Results showed that the best substitution ratio by Nano metakaolineis(3%) of cement weight for the compressive strength was increased by (110.11%), tensile by (90.49%) and flexural strength by (85.59%) more than their reference mortar strength and the best substitution ratio by rice husks ash is(4%) of cement weight for the compressive strength was increasing by (83.34%) , tensile by (75.67%) and flexural strength by (66.53%) more than their reference mortar strength and the mortar has its good workability during the work.