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Agricultural waste utilization can mitigate environmental threats from rice husks and coconut shells regarding waste management and disposal, such as turning these byproducts into ashes. Rice husk ash... (RHA) and coconut shell ash (CSA) have been used to replace cement due to their pozzolanic properties. This investigation aimed to utilize and evaluate RHA and CSA as partial cement replacements for concrete hollow blocks (CHB). There were one control (0%) and 10%, 20%, and 30% replacements observed where each has the varied RHA and CSA proportions. CHB with 20% replacement (15% RHA, 5% CSA) has the highest mean compressive strength of 2.72 MPa, while 30% (15% RHA, 15% CSA) has the lowest mean water absorption of 110.909 kg/m3. Based on the findings, a conclusion is drawn that a combination of RHA and CSA can be utilized as a partial cement replacement for CHB.続きを見る
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