A review of using EPS geofoam as compressible inclusion in reducing swell-shrink behaviour of expansive soils
摘要
The expansive soils are spread across large portions of arid and semi-arid regions and they cause significant swell-shrink behaviour. This paper describes the comprehensive review of the application of Expanded Polystyrene (EPS) geofoam as a compressible inclusion material to control the swell-shrink behaviour of expansive soils. The literature findings states that the billions of dollars are annually spent on infrastructure renewals due to volume changes in expansive soils which is higher than the natural catastrophes. Although traditional stabilization methods such as chemical additives have been proven to be successful, they often entail high-energy consumption and significant carbon footprints. The present review emphasizes the research efforts on EPS geofoam applications, examining material properties, historical usage, and recent technological developments. This study primarily addressed the previous findings which reveal that with the lower densities of EPS geofoam offers high compressibility features, which could capable to accommodate the swelling pressures of expansive soils in both vertical and lateral directions. The research findings states that the EPS products are ultra lightweight, high compressible and more fascinating material which offers an alternative choice to the traditional stabilizers. Also, the EPS products having environmental benefits such as lower production energy, the less transportation emission and it can be recycled. The results summarize that the EPS geofoam could be an alternative solution in reducing the adverse effect of expansive soils. In conclusion, the EPS geofoam paving the sustainable stabilization of expansive soils, guidelines and full-scale field testing are required to promote its general application in geotechnical practice.