Title: The application of agricultural wastes to improve lateritic soil performance: a review

Authors: Alexander Eniola Akintunde; Olukorede Michael Osuolale

Addresses: Transportation and Environmental Research Group, Department of Civil Engineering, Ladoke Akintola University of Technology, Nigeria ' Transportation and Environmental Research Group, Department of Civil Engineering, Ladoke Akintola University of Technology, Nigeria

Abstract: An effort to contribute to the actualisation of global goals has necessitated finding solutions to agricultural waste, which currently creates a nuisance for the environment. This study examined the application of some agro-waste in enhancing the geotechnical qualities of lateritic soils for construction purposes. The wastes taken into account are rice husk ash (RHA), bagasse ash (BA), etc. These wastes were collected and calcined to achieve high pozzolanic at temperatures 500-800°C at a time of 1-4 hours. It was observed that the CBR, permeability characteristics, etc., of the examined wastes met the required criteria set by international standards, which affirms the efficacy of these wastes as an environmentally friendly stabiliser for construction. In addition, agro-waste with high CaO content, e.g., RHA performs best when combined with lime or cement. However, no stand-alone agro-waste stabiliser has yet to be explored in the studies, and therefore, recommendations are provided for future work.

Keywords: lateritic soil; soil stabilisation; agro-wastes ash; environmental sustainability; geotechnical properties; road construction.

DOI: 10.1504/IJEE.2023.132631

International Journal of Environmental Engineering, 2023 Vol.12 No.2, pp.123 - 145

Received: 05 Sep 2022
Accepted: 23 Jan 2023
Published online: 31 Jul 2023 *

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