DOI:

Keywords:

Rice husk ash, pozzolan, incineration temperature, compressive strength

Abstract

This study focuses on the optimization of the burning temperature of furnace-incinerated rice husk ash (RHA) into a concrete mix design. The primary objective is to investigate the optimum incineration temperature required to develop amorphous silica from rice husk wastes and to determine the compressive strength of blended cement partially replaced at ratios of 5%, 7.5%, 10.0%, and 12.5% of RHA, incinerated at temperatures of 600°C, 700°C, and 800°C. Concrete cubes were prepared and tested after 7, 14, and 28 days of water curing. The pozzolanic reactivity of RHA depends on the silica form, analyzed by chemical composition and x-ray diffraction. The study shows that RHA improves compressive strength, especially at early curing stages, with the optimum replacement being 7.5% RHA at 700°C.

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