No abstract

Slopes are required in the construction of Highways, Railways, Earthen dams, canal banks, levees and at many other locations. The construction of embankment over the ground is not possible in a vertical way. The Soil can be piled up with slope only. The cost of earthwork is minimum if the slopes are steepest but the Steeper slopes are not safe as per stability conditions because it may fail in shear. The only force acting on the piled earth is gravity force. This gravitational force produces shear in the soil and causes slippage. The failure lead to loss of property and life. There is a lesser chance of slippage of soil if we provide more bottom width compared to its top width. But it requires more area and more earth to fill. So, it is uneconomical. In the present study, the soil was collected from the highway extension project, from the geotechnical investigation it was identified that the soil shear strength was quite low. To improve shear characteristics and to decrease the dry density of soil, it is to be stabilized with a lightweight material, possessing good frictional characteristics. A waste by-product was identified from the industry of nearest village called Manganese (Mn) slag. The soil was stabilized with various percentages of Mn slag, from the geotechnical characterization, an optimum % of slag is selected as 10 %. An embankment slope is assumed for further slope stability analysis. The analysis is carried out on two slopes, one is made with ordinary soil and the other is soil stabilized with optimum Mn slag %. Both stabilized soil embankment and ordinary soil embankment are analysed by using the Method of slices and the final results were compared.

Soil stabilization means alteration of soil properties to meet the specified engineering requirements. Lime and cement was commonly used as stabilizer for altering the properties of soil. Earth reinforcements was commonly done using Geo synthetics. From the recent study it is observed that solid waste material such as waste tyre rubber is utilized for the intended purpose with or without lime and cement. Now a days it is necessary to utilize the waste effectively with technical development in each field. The old abondedtyres from road vehicles are stockpiled throughout the country. This leads to various environmental problems which include air pollution associated with open burning of tyres, harmful contaminants and aesthetic pollution. There are non biodegradable and the waste tyre rubber has become a problem of disposal. This project is intended to utilize the feasibility of worn out tyre rubber can be used as a stabilizing material for soil in pavements. The waste tyre rubber is mixed with soil in various percentages and carried out different tests results by forming normal and rubber stabilized soil and calculate various properties that may strengthen road pavement by achieving it economically. This not only minimizes the pollution occurred due to waste tyres but also the use of conventional aggregate which is available in exhaustible quantity.