Palm Oil Fuel Ash: Promising supplementary cementing materials

Palm Oil Fuel Ash (POFA) is by-product obtained by burning of fibers, shells and empty fruit bunches as fuel in palm oil mill boilers. In this investigation, three ashes were collected from different palm oil mills around Malaysia and namely CAPOFA, ALPOFA and KTPOFA. The ashes were ground to 45 μm before replace 20% by weight of cement in concrete and mortar. The compressive strength of concretes containing POFA was tested at ages of 7, 28 and...