Effects of using pumice, lime and marble in stabilization of expansive soils

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Abstract
Expansive soils can cause severe damage to infrastructure. Extensive studies have been carried out on the stabilization of clayey soils using lime. Recently, the effect of pozzolanic materials on stabilization expansive soils has gained the attention of researchers due to their high content of SiO2 and Al2O3, which catalyze pozzolanic reactions. Turkey is rich in natural pozzolana, lime, and marble. However, few studies have been conducted to investigate the effect of adding natural pozzolana on the geotechnical properties of lime and marble-treated expansive soils. This study aims to fill that gap by conducting laboratory tests to examine the influence of pumice, lime, and marble, both individually and in combination, on the geotechnical characteristics of expansive soils. Pumice was added to soil in a range of 0%-25% with increments of 5%, whereas marble and lime are added to soil within the range of 0%-15% and 0%-8%, respectively. The study investigates consistency limits, compaction parameters, and swelling parameters. Results show that expansive soils can be successfully stabilized by combining pumice, marble, and lime.

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