Effect of Utilization of Nano POFA on Performance of Self-Consolidating High-Performance Concrete (SCHPC)
Recently, the application on green concrete has become a popular topic among researchers in many countries including Malaysia. The innovative green concrete made up of waste material as one of its constituents. Palm oil fuel ash (POFA) is an agricultural waste produced from burning a palm oil husk and palm kernel shell in palm oil mill boiler. Since POFA has no benefits, it abundantly disposed to the landfill which gives a negative impact on the environment and health. So, this research has introduced an innovative green concrete by incorporating POFA into the concrete as cement replacement to make it more sustainable and improve on its properties. However, this research highlighted the strength and workability of concrete incorporated with Nano-POFA (NaPOFA) through an experimental investigation with targeted strength of more than 40 MPa. In this study, POFA is oven-dry for 24 hours and sieve passing through 212 μm sieving pan to obtain micro-sized POFA (MicPOFA). Then, the production of nano-sized POFA (NaPOFA) was achieved by grinding the MicPOFA with a high energy ball milling machine along with a 10 mm size of zirconium ball for 48 hours. The POFA used as a replacement for the concrete with a percentage of 1%, 3%, 5%, 7% and 10% to the weight of the cement used. The workability of the concrete is determined by conducting a flow table test while the concrete strength is determined by conducting a compressive strength test. A compressive strength test will be conducted for days 1, 3, 7, 14 and 28 with a cube sample size of 50mmx50mmx50mm. All specimen results will be compared to the control specimen (0% nano POFA). The research finding shows that the inclusions of 1% NaPOFA as cement replacement in concrete improving on the compressive strength and workability. Thus, concrete incorporated with NaPOFA is considered environmental-friendly as cement replacement to produce a self consolidating high strength concrete.
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