The Effect of Rice Husk Ash Mixture as a Fine Aggregate Substitution on Concrete Compressive Strength
Pengaruh Campuran Abu Sekam Padi Sebagai Substitusi Agregat Halus Terhadap Kuat Tekan Beton
DOI:
https://doi.org/10.21070/ups.12468Keywords:
rice husk ash, fine aggregate, concrete, compressive strength, substitutionAbstract
Concrete use in construction encourages the utilization of agricultural waste as an environmentally friendly alternative material. This study analyzed rice husk ash (ASP) as a partial replacement for fine aggregate in concrete, focusing on compressive strength, slump, and volume weight. A quantitative experimental method was used with ASP substitution levels of 0%, 5%, 10%, and 15% of fine aggregate weight. Thirty six cylindrical specimens measuring 10 cm × 20 cm were tested at 7, 14, and 28 days, with three specimens for each variation. The results showed that increasing ASP content reduced concrete slump and volume weight. At 28 days, average compressive strengths were 21.71 MPa, 21.67 MPa, 16.19 MPa, and 7.59 MPa for 0%, 5%, 10%, and 15% ASP, respectively. The 5% substitution produced 21.67 MPa, exceeding the design strength of 20.75 MPa. Therefore, 5% was the highest ASP substitution level that met the design quality under study conditions.
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