A STUDY ON THE PERFORMANCE OF FLY ASH AND SAND MIXES AS SUB-GRADE AND FILL MATERIAL

Satyanarayana.P.V.V, Rahul.Ch, Uday Kiran.Ch, Raghava Rao E.V

Abstract: An excellent road network is an asset to any developing country particularly India and a perfect road network would complement its development. In pavements the most commonly used materials are sand, murrum, natural soils, etc., for sub-grade and fill material which proves to be a costly affair in terms of construction as well as maintenance. To maintain the quality and economy in construction, materials obtained from industrial wastes like pond ash, fly ash and bottom ash can be used. For this study a combination of fly ash and sand mixed at various proportions have been studied for geotechnical characteristics like compaction, strength characteristics like angle of shearing resistance, CBR etc. The results obtained from the tests show that these mixes attained high dry densities with high CBR and shear strength values. From the experimental data, it is also seen that a dosage of 40-50% of sand to the fly ash generates CBR values greater than 10% and angle of shearing resistance greater than 36? can be used as sub-grade and fill materials in geotechnical applications

Keywords: Fly ash, Sand, CBR, Sub-grade

DOI: https://doi.org/10.15623/ijret.2016.0505015