IMPROVEMENT OF EXPANSIVE SOILS USING ENVIRONMENTALLY FRIENDLY POZZOLANIC MATERIAL

Abstract

Clayey soil with a high degree of flexibility and a poor bearing capacity is always problematic for structures. Montmorillonite is the main component of Nandipur, Gujranwala clay. The activity of the soil is increased by montmorillonite. In order to increase unconfined compressive strength and decrease the activity of clayey soil, this study intends to utilize an environmentally friendly and economically viable material , that is the Ginni Pozzolan. In order to identify the soil index qualities, samples from Nandipur Gujranwala were gathered.These included the Particle Size Analysis, Atterberg Limits, and Specific Gravity tests. The results obtained from the laboratory tests were used to classify the soil by USCS classification as highly plasticity clay (CH). The Standard Compaction test was performed to obtain the maximum dry density and the corresponding optimum moisture content. Untreated clay and clay with additions were tested for their unconfined compression strengths. Additionally, the activities of untreated and additive-added clay were evaluated. After the addition of 1% Ginni pozzolan and 5% lime, soil stability has greatly increased. In addition to laboratory testing, the UCS values of untreated clay and clay with additions were simulated using the Abaqus programme. With the addition of 5% lime and 1% Ginni pozzolan to clay, software also demonstrated an increase in unconfined compressive strength.