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Effect of Industrial Waste and Chemical Additives on CBR Value of Clayey Soil

B M Patil and K A Patil
Civil Engineering Department, Government College of Engineering, Station Road, Aurangabad (431005)

Abstract—The construction of rural road in clayey soil is a challenge to civil engineer due to its low California Bearing Ratio (CBR) value. This paper deals with the effect of industrial waste and chemical additives on the CBR value of soil. The various industrial waste like fly ash, pond ash and stone dust mixed in clayey soil with RBI Grade 81 as chemical additives in different proportions and its soaked CBR value determined in the laboratory. The CBR value of subgrade soil is less than 2%, it is required to replace this soil by good quality granular material. If the granular materials are not available near the site, the cost of construction of road increases due to transportation of these materials. To overcome this problem, it is possible to improve the CBR value of subgrade soil by using various industrial waste and RBI Grade 81. The CBR value of untreated soil is 2.56%. The CBR value of treated soil with 20% pond ash and 4% RBI Grade 81 is 12.74%. The percentage increase in CBR value is 397% than untreated soil. If the CBR value of subgrade soil improved the thickness of road section also reduces which help to reduce the cost of construction. 

Index Terms—clayey soil, CBR value, industrial wastes, RBI grade 81, subgrade soil

Cite: B M Patil and K A Patil, "Effect of Industrial Waste and Chemical Additives on CBR Value of Clayey Soil," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 4, pp. 243-247, November 2013.