THE EFFECT OF USING ASH RESIDUES OF OLIVE FRUITS ON THE PROPERTIES OF CEMENT MORTAR
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This research aims at studying the effect of the use of the burnt olive oil waste ash (OWA) resulting from olive plant wastes as a partial cement replacement (5%, 7% and 10%) on the properties of cement mortar. The ash burning temperature varies as 600, 700, 800 and 900˚C, and time as 6, 7, 8 hours. The mortar cured in air and water were prepared with 0.42 w/c ratio and sand to water ratio of 1.5 by mass. The results showed that the 600˚C was efficient in terms of contribution to strength, specific gravity while 7% cement-OWA replacement mixture was found to favour flowability of the mortar compared to 5 and 10% substitution. Extending OWA burning time temperature to 900˚C and 8hrs increased its porosity and water absorption of the resulting mortar. The OWA slowed down the setting time which made it suitable in the hot weather concreting practice.