Effect of natural zeolite additives on physical and hydraulic properties of expansive soil stabilized with cement

Expansive soils are considered as an overall challenge especially for civil engineers. Such soils swell when given an access to water and shrink when they dry out. The most common and economical method for stabilizing these soils is using of the additives that prevent volume changes. Variation, improve and optimize the physical and hydraulic properties of soil with use of additives including zeolite and cement additives have been considered for always. In this study the effect of cement in rang of 3 g/kg and zeolite in range of 4, 8 and 12 g/kg of soil as additives content on physical and hydraulic properties of soil contain percent and pressure swell and sorptivity(S) were investigated. The results showed that the addition of mixture of zeolite and cement into soil in different amounts effect on physical and hydraulic properties of soil in a different way. In general, the addition of a mixture of zeolite and cement helps to reduce percent and pressure swelling of soils in different contents. Combination zeolite and cement with soil decrease sorptivity of specimens. As, the maximum reduction for specimens occurred in application of 8 g/kg zeolite and 3 g/kg of cement.