Behaviour of Sulfate Infected BC Soil with the Addition of Lime Stone Powder and Different Fibres

Abstract

Abstract: The stress resistant properties of soils can be improved in a variety of ways. For example, sheets, strips or rods of metal or polymeric materials can be placed in the soil to create a composite material. Researchers believe that there is a great potential of combined usage of monofibres and hybrid fibers as a stabilization materials in sulphate infected black cotton soil mix, making it stronger and durable. But not much progress has been made in this regard. The main objective of this research work is to investigate the index properties and stress resistant properties by adding stabilization materials like, lime stone powder along with monofibres and hybrid fibres. The research is proposed to address the following problems. 1. Effect of replacement of sulphate infected BC soil by stabilization material such as lime stone powder (LSP) in different percentages like 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40% and thereby determining the optimum dosage of stabilization materials. 2. Effect of addition of different monofibres such as Jute fibre (JF), Poly propylene fibre (PPF), Waste plastic fibre (WPF) and High density polyethelene fibre (HDPEF) on the properties of sulphate infected BC soils. 3. Effect of addition of different hybrid fibres such as (JF+WPF), (PPF+WPF) and (PPF+HDPEF) on the properties of sulphate infected BC soils. It is observed that the sulphate infected black cotton soil using lime stone powder as stabilization material has shown improved index properties at 15% replacement level. Unsoaked CBR value, soaked CBR value, cohesion value from direct shear test and UCC test cohesion value, all show an increasing trend upto 15% replacement of black cotton soil by lime stone powder. After 15% replacement level, all the above values go on decreasing. It is observed that the sulphate infected black cotton soil using lime stone powder as stabilization material along with monofibres has shown improved stress resistance properties when monofibres are added at 1.5% by volume fraction. From the results obtained, it may also be concluded that, the performance of HDPE fibres is better than polypropylene fibres, waste plastic fibres and jute fibres in enhancing the stress resistance properties of sulphate infected black cotton soil using lime stone powder as stabilization material. Keywords: Lime stone powder, Polypropylene fibres, Sulfate infected BC soil, Stabilization, Stress resistant