A critical appraisal on strength, mineralogy and morphology of clayey soil stabilised with nano additive's

• Published in: Geomechanics and geoengineering : an international journal Vol. 19; no. 5; pp. 840 - 867
• Main Authors: Chaudhary, Vaibhav, Yadav, Jitendra Singh, Dutta, Rakesh Kumar
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 02.09.2024
• Subjects: microstructure; Nano additives; strength; Weak soil
• ISSN: 1748-6025; 1748-6033
• DOI: 10.1080/17486025.2024.2324869

Civil engineering projects are always at high risk of failure when constructed on weak or soft soils due to their lower shear strength and settlement issues. This study summarises the influence of various Nano additives such as Nano aluminium oxide, Nano magnesium oxide, Nano copper, Nano clay, Nano carbons and Nano calcium carbonateon the strength, mineralogical and morphological properties of problematic soils as reported by the researchers. The strength properties such as unconfined compressive strength, direct and triaxial shear strength, and California bearing strength were enhanced with the incorporation of Nano additives up to the optimum amount of dosage in the soil. The very low amount of dosage of Nano additives provided a dramatic change in the strength due to their higher specific surface area as compared to the traditional additives such as cement and lime. The mineralogical and morphological studies showed denser and stiffer soil matrices and depict the formation of new cementitious compounds. From the detailed review of past literature, it can be concluded that the inclusion of a small amount of Nano additives in soil is capable of some shadowing the negative effect of problematic soil for construction purposes.