A Study on Utilization of Recycled Aggregate and Pond Ash in Road Construction (original) (raw)
An excellent road network is an asset to any developing country and India in particular as it is one of the largest countries in the world and a perfect road network would complement its development. The road transport forms the arterial infrastructure to facilitate trading and transport of passengers and commodities. A flexible pavement which is the mostly used form of pavement has four component layers namely surface, subgrade, Sub-base and Base courses. Which are comprised of materials like natural aggregate, sand, Morrum etc, are proved to be costly affair in terms of construction as well as maintenance. For the purpose of easy maintenance and cheaper construction maintaining the same quality, materials obtained from demolishment activities and industrial wastes like recycled aggregate, pond ash, fly ash, bottom ash, GGBS can be used. For this study a combination of recycled concrete aggregate and pond ash mixed at different proportions has been studied for geotechnical characteristics such as compaction, gradation and strength characteristics. The pond ash has been used as a replacement to the material below the size 4.75mm . The results from this study are there by used in evaluating this combination of materials can be used in the pavement design and construction. Maximum CBR value was obtained at 30% dosage of pond ash is 55. From the experimental data, it is also seen that a dosage of 30-40% of pond ash to the recycled aggregate generates CBR values greater than 60% can be used for base course and greater than 30% has a sub base course materials as a replacement to natural aggregate and sand.
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