Prediction of Swelling Characteristics of Expansive Soils

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Date
2012-05
Authors
Mohamed, Magdi
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Publisher
uofk
Abstract
Prediction of swelling potential is quite important in design of foundations on expansive soils. This paper presents and analyses the results of a laboratory investigation for the swelling characteristics, namely, swell percent at a certain surcharge pressure (Sr) and swelling pressure (SP). The 5, and the SP were measured for four expansive soils compacted at different water contents and dry densities. Analysis of the experimental results demonstrates very clearly a strong linear relationship of S, and SP with the Factor of initial soil state (F,), combination of water content, dry density and void ratio. The coefficients of this linear relationship (i.e. constant and slope) were found to depend on clay content, plasticity index and surcharge pressure. Comparison of the measured and predicted values of S, and SP using the developed equations clearly indicates the reliability of these equations.
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Keywords
swelling potential, swell percent, swelling pressure& initial soil state factor
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