Subgrade Stabilisation using Alkali Activated Materials: A Review

The performance of pavement construction is determined by the behaviour of the subgrade soil and its bearing capacity. Expansive subgrade soil is problematic to pavement and other types of construction activities because of its high swelling and shrinkage, necessitating stability with various materials. Soil stabilization using different chemicals has been used to enhance soil qualities to make them suitable for the desired engineering purpose. Expansive subgrade can be stabilized using alkali-activated slag, fly ash and other industry by-products and this also helps in solving disposal difficulties. A review of the literatures on this issue demonstrates the significance of studies on alkali activated materials to stabilize soil. It also demonstrates changes in the characteristics of soil following stabilization with alkali activated materials and this method is cost effective. It also contains several chemicals that, in various combinations, reduce the expansive tendency of soil. Based on the available literature, this paper examines the behaviour of soil following stabilization with alkali activated materials.