Estimation of swelling characteristics of expansive soils with influence of clay mineralogy

In the present study, characterisation and quantitative microanalysis were identified for six expansive soils of which one is natural soil, i.e. black cotton (BC) soil remaining prepared by mixing BC with different percentage bentonite. The samples characterised X-ray diffraction (XRD) scanning electron microscope (SEM). regular or irregular mixed layers justified SEM images. There are superstructures whose spacing can simply be described as ratio soil. d-Spacing was calculated Bragg’s formula observed joint committee on powder standards card equation h-k-l plane it that d-spacing decreased increasing combination. Moisture content taken below optimum moisture content, 15%, 17% 20% to determine swelling pressure found montmorillonite mineral affects characteristics soils.