Open AccessImprovement of Pavement Subgrade Soil using Millet Husk Ash for Rural Roads
Author(s) -
Anish Kumar,
Roop Kishor,
Chaitanya Nidhi
Publication year - 2020
Publication title -
international journal of engineering and advanced technology
Language(s) - English
Resource type - Journals
ISSN - 2249-8958
DOI - 10.35940/ijeat.d7212.049420
Subject(s) - husk , subgrade , water content , environmental science , bulk density , moisture , california bearing ratio , mathematics , geotechnical engineering , soil science , soil water , materials science , engineering , composite material , botany , biology
This paper focuses on the improvement of subgrade soil by using Millet Husk Ash (MHA). MHA is a commonly available material found in a significant quantity as India is the largest producer of millet in the entire world. The MHA was mixed in soil by partially replacing the soil by weight in 0%,2.5%,5%,7.5%,10%,12.5% and 15%. The soil in its natural state was in the form of intermediate plastic clay whose dry density got reduced and the optimum moisture content got increased after stabilization. The CBR and UCS values increased initially but showed a decrease after a certain point. The sudden transition from increasing values to decreasing values marks a peak point showing the optimum content of MHA. The optimum content of the ash was found to be 10%. A significant increase in the values of UCS and CBR was also observed.