Mechanical Performance of Palm Oil Fuel Ash Blended Concrete for Sustainable Construction

The increasing cost of cement and CO2 gas emissions associated with its usage and production has led to the search for an alternative binder for sustainable environment. This research examines the mechanical performance of palm oil fuel ash (POFA) as binder in concrete for sustainable construction. Ninety (90Nos) cubes (150mm), Ninety (90Nos) cylinders (300mmlong × 150mmdia) and Seventy-two (72Nos) beams (750mm × 150mm × 150mm) specimens were produced at varying POFA percentage replacement of 0 -50% at 10% interval with a water to cement ratio of 0.55 and a mix ratio of 1:1.5:3. Physical properties, chemical compositions and mechanical properties were investigated at the fresh and hardened stages. Coefficient Equations Approach method was used for predicting the mechanical performance of POFA blended concrete. The results showed that palm oil fuel ash exhibited some pozzolanic properties and can be classified as class N pozzolan. The degree of workability increases gradually as the POFA increased from 0 to 50% replacement level. High strength was recorded at 10% replacement in all mechanical tests carried out. At 10% replacement of POFA, compressive strength value of 30.2N/mm2 was