Steel slag is generated as a solid waste material during the production of a specific type of steel from melted iron. Engineers are often faced with the problem of constructing roadbeds on or with soils, which do not possess sufficient strength to support wheel loads imposed upon them either in construction or during the service life of the pavement. It is, at times, necessary to treat these soils to provide a stable sub-grade or a working platform for the construction of the pavement. In the broad sense, the comprehensive utilization of slag will have significant benefits in three major ways. Firstly, there will be a substantial reduction in environmental pollution due to changes in current practice, whereby the existing material is disposed off by dumping and stockpiling. Secondly, the use of such material will supplement, or replace, the need for using natural materials, thereby resulting in protection of natural, non- renewable resources and a reduction in energy requirements associated with the winning of natural materials. Thirdly, there exists the possibility of altering, or modifying, physical and chemical properties of the basic materials to produce special engineering materials which can be utilized for specific applications. The availability of steel slag in an industrial area is in abundant amount; so that it is economical to use steel slag nearby industrial area (city or town). To find out engineering properties of soil & steel slag as a sub- grade, various tests were carried out such as Grain size analysis, Grain Determination of consistency, specific gravity, Standard Procter test for obtained Maximum dry density and optimum moisture content and California Bearing Ratio (CBR).
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