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- W2116739640 abstract "3 Abstract: Soil composition in urban environment is changing daily due to human and industrial activities. Organic and inorganic materials are added to soil at uncontrolled rate. The research focused on the influence of calcium sulphate salt on the shear strength properties of subsoil. Twenty one samples of subsoil were obtained from a borrow pit in Ibadan, Nigeria. The samples were subjected to 0, 10, 30, 50 4 and 70 g/l concentrations of CaSO salt solution for 364 days. During the curing period, soil samples 4 chemical properties such as cation exchange capacity CEC, exchangeable calcium Ca and sulphate SO 2 + 2- were monitored. Also, their cohesion and angle of friction properties were measured. Using multiple linear regression statistical analysis tool, predictive model for generating the subsoil cohesion and angle of friction was developed and validated. The laboratory results showed that there were initial increments in 4 soil angle of friction and cohesion due to presence of CaSO salt. The Ca brought about formation of 2 + strong bond among clay minerals responsible for the increments observed. The model revealed that the increments were not permanent and subsequent reduction in soil geotechnical properties would occur. There was high tendency for the soil to regain its uncontaminated cohesion and angle of friction properties 4 with time. The time was found to be function of the magnitude of CEC, exchangeable Ca and SO 2+ 2 -" @default.
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- W2116739640 date "2009-01-01" @default.
- W2116739640 modified "2023-09-23" @default.
- W2116739640 title "Influence of Calcium Sulphate on Subsoil Cohesion and Angle of Friction" @default.
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