Scope of nanomaterial as potential soil stabiliser in pavement engineering
DOI:
https://doi.org/10.62638/ZasMat1316Abstract
Present study explores the application of nanosilica in improving the strength of soil subgrade to reduce the pavement thickness. Changes in the plasticity characteristics of soil stabilised with nanosilica was evaluated through Atterberg limit tests. Unconfined compressive strength (UCS) tests were performed on specimen cured for 0, 7, 14 and 28 days to find the optimal percentage of nanosilica for achieving maximum strength. California bearing ratio (CBR) test indicated a substantial reduction in pavement thickness with addition of nanosilica to the soil. Results from Field emission scanning electron microscopy analysis confirmed the formation of Calcium-Silicate-Hydrate gel responsible for strength improvement of the soil. Thus, inclusion of nanosilica can facilitate the reduction in the quantity of materials required for laying pavement.
Keywords:
clay soil, nanosilica, unconfined compressive strength, california bearing ratioReferences
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