Utilization of Palm Oil Boiler Ash (POBA) as a partial replacement of sand in foamed concrete / Mohamed Khatif Tawaf Mohamed Yusof ... [et al.]

Industrial by-products derived from agricultural crops are observed as viable resources for the development of environmentally friendly and durable concrete. Undesirable waste generated from agricultural activities has distinct properties that make it suitable for proper application in concrete production. For additional cementitious materials, oil palm kernel shell (OPKS), coconut shell, fly ash, rice husk ash (RHA), and oil palm shell are some of the wastes that can be utilized because of their pozzolanic qualities, which enhance the mechanical properties of solid concrete. The goal of this study is to assess the potential of palm oil boiler ash (POBA) to be used in foamed concrete as a partial replacement material. It has been discovered that adding POBA to the foamed concrete matrix boosts the compressive strength of the concrete blends by filling the voids in the concrete with fine POBA particles, which function as a filler and improve the compressive strength of the concrete. The compressive strength and density values for 12% POBA as a sand replacement were found to be the highest of any percentage of POBA replacement. It has been demonstrated that adding POBA to the foamed cellular concrete structure matrix helps in pores formation, producing a lightweight product with a better compressive strength. The results of this study suggest that POBA can be employed as a supplementary cementing ingredient.