Authors : A.M. Dauda, J.O. Akinmusuru, O.A. Dauda and O.T. Durotoye
Abstract: This research investigates the effect of stabilizing with Perinwinkle Shell Powder (PSP) on the geotechnical properties of expansive soil. A comparison of the stabilization effect of PSP to that of commonly use Ordinary Portland Cement (OPC) on the expansive soil sample was also carried out. Preliminary test was carried out on the un-stabilized soil samples for the purposes of identification and classification, i.e, natural moisture content, specific gravity, liquid limits, plastic limits, plastic index after which engineering tests such as compaction and California Bearing Ratio (CBR) tests on the expansive soil at its natural un-stabilized state. The engineering tests was repeated on the soil samples stabilized with 2-10% PSP and OPC, respectively. Cement as expected shows a progressive increase in the Maximum Dry Density (MDD) of the soil sample from 1875-2294 kg/m3 from 2-10%, respectively. This represent 22% increase in the MDD from the un-stabilized state. For PSP, the Maximum MDD was recorded at 6% PSP addition with a value of 1974 kg/m3, representing a mere 5.3% increase in MDD of the soil from the un-stabilized state. For both stabilizing agent the Optimum Moisture Content (OMC) increases from 13.65-13.83% and from 11.72-14.41% for cement and Periwinkle Shell powder, respectively. For PSP CBR from 5.8-19.7%. Periwinkle Shell powder is therefore a fairly good stabilizer for expansive soil.
A.M. Dauda, J.O. Akinmusuru, O.A. Dauda and O.T. Durotoye, 2018. Geotechnical Properties of Expansive Soil Stabilized with Periwinkle Shells Powder. Agricultural Journal, 13: 56-59.