FRESH STATE AND MECHANICAL PROPERTIES OF SELF COMPACTING CONCRETE INCORPORATING POFA
DOI:
https://doi.org/10.11113/jt.v78.8349Keywords:
Self compacting concrete, palm oil fuel ash, workability, compressive strength, modulus of elasticityAbstract
Self-compacting concrete (SCC) is considered as a concrete, which can be placed and compacted under its own weight without vibration. The elimination of the need for compaction leads to better quality concrete and substantial improvement of working conditions. This paper investigates the fresh state and mechanical properties of self-compacting concrete incorporating palm oil fuel ash (POFA) as a substitute for cement. Portland cement (PC) was partially replaced with 0%, 5%, 10% and 15% POFA. The water to cement ratio was fixed at 0.4 for all mixtures. The workability of self-compacting concrete in terms of viscosity was determined from slump flow test (Diameter and T500), and V-funnel. The mechanical property tests were conducted on SCC cubes and cylinders to determine its compressive strength and modulus of elasticity. The results indicate that replacement of 5% POFA is the optimum value for cement replacement to obtain high workability and mechanical properties of concrete. SCC achieved the highest compressive strength at 28 days, which is 38.4 MPa, and MOE of 31.6 GPa with 5% POFA replacement.
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