Improvement in properties of subgrade soil by using pond ash and chemical additive (original) (raw)

The crust thickness of road depends on strength of subgrade soil and traffic intensity. The cost of construction of road depends on the crust thickness and available material. The cost of construction of road increases, if good quality materials are not available in nearby areas of road construction sites. This problem can be solved by improving the geotechnical properties of subgrade soil. This paper deals with the improvement in properties of subgrade soil like Maximum Dry Density (MDD), Optimum Moisture Content (OMC) and California Bearing Ratio (CBR) value be addition of additives. The pond ash is a thermal power plant waste and RBI Grade 81 is a chemical soil stabilizer used to improve the geotechnical properties of subgrade soil. The geotechnical properties of subgrade soil are improved significantly due to addition of pond ash and RBI Grade 81 together. The soaked CBR value of subgrade soil is 2.56%. The soaked CBR value of mix i.e. soil: pond ash: RBI Grade 81 in the proport...