Author(s): HHM Darweesh and H Abu-El-Naga

Abstract: Effect of curing temperatures on the hydration, physical and mechanical properties of the cement pastes incorporated 20% ceramic sanitary ware powder waste (CSPW) was investigated. Results showed that the curing temperatures initiated and activated the hydration process of the cement pastes. Total porosity was decreased till 60 ℃. This was reflected positively on water absorption and bulk density. The same trend was displayed with mechanical properties. The specimens of cement pastes that were hydrated at curing temperature 60 ℃ recorded the best results, where the total porosity (15.13%) and water absorption (14.97%) are the lowest, while the bulk density (2.0903 g/cm3) was the highest. Also, the flexural and compressive strengths achieved the highest values as 46.83 and 73.42 MPa, respectively. Suddenly, all the characteristic properties were slightly adversely affected with any further increase of curing temperature › 60 ℃. Consequently, the optimum water curing temperature is 60 ℃, and any higher curing temperature over than 60 ℃ must be avoided.

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