Compressive strength
Cube specimens of mortar were prepared to conduct the compressive strength test according ASTM C-109. The test was
made for determining 3, 7 and 28 days compressive strengths The results indicated that the compressive strength of hardened blended cement paste containing different percentages,partial replacement of cement, of olive waste slightly decrease with olive waste content. This is mainly due to the decrease of amount of cement in blended cement paste. This leads to a decrease in the amount of hydration products such as C3S and C2S which are responsible for strength development as well as increase of porosity of the blended paste when the olive waste percentage increases up to 12% the compressive strength considerably decreases. This is due to the increase in the amount of olive waste that leads to significant retard of hydration.