Study on the geotechnical properties of fly ash and its application in soft soil stabilization

Soil stabilization had become a major issue in construction engineering and the researches regarding the effectiveness of using industrial wastes as a stabilizer were at a fast pace. This study is focused on suitability of the local fly ash to be implemented in the local construction industry for the stabilization of local soft soil specifically in such a way to minimize the waste to be disposed to the environment which can pollute the environment and cause health hazards to the public. The basic geotechnical properties of local fly ash were determined in order to understand its behaviors. The study shows the liquid limit of fly ash and clay mixture of 0%, 5%, 10%, 15% and 20% by dry weight of clay result in a declined value. The effects of fly ash addition with proportion of 0%, 60%, and 80% by soil dry weight also been investigated. The shear strength of cured sample tested was decreasing when amount of fly ash governed 80% of the total weight of mixture within the limitation based on the dry density and optimum moisture content of the fly ash