Potentials of Palm Kernel Shell Ash as Partial Replacement of Lime on the Geotechnical Properties of Lateritic Soil for Road Construction
- Author Michael O. Dada
- Co-Author Omolade R. Olulope
- DOI
- Country : Nigeria
- Subject : Civil Engineering
Keywords : Palm kernel shell ash, Lime, Lateritic soil, Geotechnical properties, Stabilization, Road Construction
Abstract
The possibility of complementing poor lateritic soils with Palm Kernel Shell Ash (PKSA) and subsequent stabilization of the resulting composite mix with lime was investigated. The scope was limited to strength characteristics and cost analysis of the mix. Meanwhile, the PKSA was analyzed to be pozzolanic. Its oxides contents were similar to that of lime, though calcium content was much lower. The natural lateritic soil samples used were tested and found to be unsuitable for sub–base and base course of roads. Lateritic soil samples stabilized with Lime - PKSA of 2 to 8% satisfied the requirements for use as road sub – base. Stabilized lateritic soil containing 6-8% of the additives was suitable for base course in terms of CBR >30%. The PKSA is therefore recommended as partial replacement of lime in lateritic soil stabilization because of the strength and durability properties and reduced cost of stabilized soils.
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