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No of Pages: 15

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Abstract:

This paper examined the basic engineering and geotechnical properties of poor subgrade soils using woven geotextile to stabilize them and to also deal with the problem with lime under soaked conditions, it is intended at increasing the strength and mechanical properties of the soil even in extreme conditions. This is considered to be of great importance in civil engineering works as road structures need to be catered for during the rainy season. Subgrade soils, its properties like plasticity and strength are essential to the design of pavement structures and any road construction. Experiments were carried out to investigate the application of woven geotextile on lime stabilized lateritic soils under soaked conditions.

Geotechnical test were carried out to determine particle size analysis, atterberg, compaction and California bearing ratio test. CBR test were carried out by placing the geotextile at varying depths under soaked conditions to determine the bearing capacity of the soil. The result shows that the strength of lateritic soil is visibly increased by introducing geotextiles at different layers in the soil. It is found that geotextile placed at 3/5 the distance from the base showed higher CBR value by comparison the control result. The strength of the laterites was considerably increased. It has low maintenance, corrosion resistance, no threat to human health and increases the service life of road pavement. Geotextiles should be considered when dealing with the problems with lime and as a modernized form of improving road construction on poor laterites under soaked conditions.

Keywords: Stabilization, Geotextile, Lime, Laterite, soaked.