Abstract
This investigation is conducted to study of the effect of adding of the milted clay brick powder(MCBP) with the
admixture (silica fume) (SF) on the properties of clay brick. All specimens of bricks were made from al_furat
factory soil . three levels of addition were used for (MCBP) ,(2%,4%,and8%by weight of dry soil)and three levels of
addition were used for (silica fume)(3%,6% and 9% by weight of dry soil). All specimens were mixed ,molding and
placing by hands with special mold. The experimental results showed that the increasing of addition
(MCBP)without silica fume increases of compressive strength and decreases water absorption and efflorescence in
clay brick, but the silica fume addition is decreased of compressive strength and increases the absorption of water and efflorescence phenomena