Stabilization of subgrade with expansive soil using agricultural and industrial By-products: A review

Abstract

Expansive soils cover a large part of India and possess certain undesirable engineering properties such as low bearing capacity and large volumetric changes which causes severe damage to the pavements. Therefore, it is necessary to improve the geotechnical properties of expansive soils so that it becomes easier to construct pavement using these expansive soils. Agricultural and industrial byproduct such as rice husk ash, sugarcane bagasse ash, fly ash, plastic waste, coir pith and fiber, calcium carbide residue, cement kiln dust, silica fume and red mud etc. are found to be useful in pavement construction. Studies have reported that the strength of stabilized soils significantly improved with the use of various types of industrial and agricultural byproduct. If these waste materials are available locally for soil stabilization, it leads to the development of cost-effective and sustainable pavement construction. Further, utilization of these byproduct as a soil stabilizer also solve the problem of their disposal. As a result, the environmental problems caused by these byproducts from industrial and agricultural will be reduced. The research paper provides an overview of the utilization of different byproducts from industry and agriculture that have been used in soil stabilization as strengthening agents.