Geotechnical Properties of Landmark University Lateritic Soil Stabilized with Cassava Peel Ash
1Gana A.J; 2Adewara Sunday O.; 3Aremu Charity. O & 1Oluwatomisin A.G
1Department of Civil Engineering, Landmark University, Omu-Aran, Kwara State
2Department of Economics, Landmark University, Omu-Aran, Kwara State
3Department of Agriculture, Landmark University Omu-Aran, Kwara State
Email: phildebo123@gmail.com
ABSTRACT
This research work investigated the geotechnical properties of lateritic soil stabilized with cassava peel ash. The natural soil sample was gotten from Landmark University, Omu-Aran, Nigeria, and were subjected to preliminary soil tests such as natural moisture content, specific gravity and atterberg limit at its natural state. Engineering tests such a direct shear test, permeability and unconfined compressive strength tests were also carried out on the lateristic soil at their natural states and at when the cassava peel ash were added to the soil at varying proportions of 0,2,4,6,8 and 10% by weight of soil. The result of the strength tests showed that cassava peel ash enhanced the strength of the interitic soil. The unconfined compressive strength improved from 16.7kN/m2 at natural state to 298.7 kN/m2 at 10% cassava peel ash. The cohesion values also increased from 63 kN/m2 at natural state to 115 kN/m2 at 8% cassava peel ash. The coefficient of permeability values of the modified soil indicates its potential as an embankment fill material with good drainage capacity. The microstructural images of the natural soil and stabilized soil also gave an indication to the effect of cassava peel ash on the soil fabric. Cassava peel ash has a promising potential for stabilizing and improving the properties of lateritic soil.
Keywords: Geotechnical properties, Landmark University Lateritic Soil, Cassava Peel Ash
