Effect of Fine Content on SWCC of Sandy Soils

Dohare, Deepti and Basha, B Munwar (2018) Effect of Fine Content on SWCC of Sandy Soils. Masters thesis, Indian Institute of Technology Hyderabad.

Full text not available from this repository. (Request a copy)

Abstract

As it is know n that there is no soil which is completely pure in nature. Soils are always a mixture of one or more kind of soils like gravels, sands, silts and clays. In this thesis also, there is discussion about mixtures of sand with fines in different percentages. Th is study mainly focuses over backfills where we see this kind of mixtures. In this study, we come to know about the behavio u r of the sand and fines mixture with respect to the suction parameters. As we are going to measure suction, it means that soil is no t fully saturated; it is in unsaturated condition having four phases of soil which are soil, water, air, and contractile skin. Contractile skin is neglected during the experiments. Soil Water Characteristic Curve (SWCC) is used as a tool to observe the beh aviour of sand and fines mixture with respect to the suction values. SWCC relates gravimetric water content or degree of saturation with the suction of the soil. Suction may be total suction or matric suction or osmotic suction. With this curve, the suctio n parameters a, n and m are observed and it was seen that a parameter is increasing as the percentage of fines is increasing in the sand and fines mixture. This implies that as the fineness is increasing in the mixture, unsaturated condition occurs slowly. We can see that as the degree of saturation goes down, the suction increases to a high value. As we have sand in major proportion, suction value is not very high as compared to fully clays

[error in script]

IITH Creators: