Enhancing the durability of sustainable concrete: a study on ternary blended agro-waste ash incorporating rice husk ash and sugarcane bagasse ash

In this research, the potential advantages of using agro-industrial waste, rice husk ash and sugarcane bagasse ash as pozzolanic materials to produce sustainable concrete are covered. Ordinary Portland cement (OPC) was partially replaced with rice husk ash (RHA) and sugarcane bagasse ash (SBA), starting at 0% (referred to as the control mix) and continuing to reach 30% at intervals of 5%. By maintaining a maximum replacement rate of 30%, starting with 30% SBA and 0% RHA, maintaining 70% OPC constant, and gradually raising RHA by 5% and lowering SBA by 5% in concrete, the combination of SBA and RHA was also investigated. Manufactured sand completely replaces river sand. The workability of freshly produced concrete was evaluated using a slump cone test. This study evaluated the impact of RHA and SBA on workability, sorptivity, saturated water absorption, impact resistance, and resistance to chloride penetration using a rapid chloride penetration test with eighteen M-30 grade concrete mix. The workability of sustainable concrete was found to be lower than that of regular concrete. In durability testing observations, OPC and RHA combination shows high chloride penetration ranging from 5 to 65% increase. The sorptivity of sustainable concrete gradually rose with SBA & RHA content. A relationship observed between saturated water absorption and RHA replacement percentage. The experimental results suggest that employing 5% SBA and 5% RHA as individual or combined partial cement replacement materials could yield optimal outcomes.