Abstract
Palm oil fuel ash (POFA) and ceramic sludge (CS) are waste materials that found produced abundantly in the palm oil and the porcelain industrial sectors respectively. However, these waste materials are improperly managed that proved can give adverse impacts to the environment and human’s health. This research was carried out in order to identify the potential of POFA and CS as partial cement replacement materials in cement paste. POFA was prepared at 10, 20, 30 and 40 % replacement of Ordinary Portland cement (OPC) and CS was prepared at 60 % substitution of the cement paste. The effects of POFA and CS in the cement paste in term of compressive strength at 1, 3, 7, and 28 days of curing were also determined. The results indicated that the optimum compressive strength of cement paste was achieved by P2 containing 10 % POFA: 30 % OPC: 60 % CS. As a result, the utilisation of POFA and CS as partial cement replacement materials can significantly reduce the high amount of OPC usage apart of reducing the environmental problems and human’s health problems.
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