Abstract
Physical and mechanical properties of the prepared light weight building bricks made from clay, cement kiln dust waste and sewage sludge that fired at 900, 950 and 1000 °C were evaluated and studied. Results showed that the water absorption and apparent porosity were diminished and decreased with the replacing of cement kiln dust waste at the expense of sewage sludge till 12 wt. % cement kiln dust waste content, while the bulk density, flexural and compressive strengths were improved and enhanced. Any further increase of cement kiln dust waste content more than 12 wt. %, both physical and mechanical characteristics were adversely affected. All these characteristics were more improved with the increase of firing temperature. Therefore, the optimum brick batch was that containing 12 wt. % cement kiln dust waste at 1000 °C.
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