Investigation on Properties of Concrete with Palm Oil Fuel Ash as Cement Replacement

Abstract Pozzolanic materials in concrete works are increasing and are expected to continuously increase in the years ahead because of technological advancement and the desire for sustainable development. This study presents some experimental results on the behavior of Palm Oil Fuel Ash POFA in concrete. Specimens containing 5 15 25 35 and 45 POFA were prepared at constant water-cement ratios of 0.5 with superplasticizer content of 0.5 with cement. Workability in terms of slump and strength properties were studied and compared with control specimen. The Study discovered that the workability of POFA concrete was quite satisfactory in the expected range while the compressive tensile and flexural strengths increased with POFA replacement up to 25 15 and 15. Consequently the general optimum strength for all variable hardening tests was found at 15 POFA replacement.