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Concrete strength investigation using agricultural waste ash in place of some of the cement
Abstract
This study reports on research done to determine the strength properties of cement concrete composed of two agricultural wastes, namely groundnut husk ash (GHA) and rice husk ash (RHA), along with Ordinary Portland Cement (OPC). Cubes were cast using replacement percentages of 0.25, 2.5, 5, 7.5, 10, and 12.5% for both ashes. The purpose of the chemical analysis was to determine the pozzolana characteristics of RHA and GHA. The density and slump were found to drop from 2440 kg/m3 to 2237 kg/m3 and from 70 mm to 27 mm, respectively. Moreover, compressive strength falls in relation to control mix with the exception of 10% replacement. Chemical analysis in small areas and scanning electron microscopy (SEM) Analysis using Energy Dispersive X-ray Spectrometry (EDS) was also conducted to monitor the phase shifts.
References
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