Document Type : Original Article
Authors
1
civil engineering dept. university of tabriz- 29 bahman boulevard Tabriz Iran
2
civil Eng. Department, Marand Technical Faculty, University of Tabriz, Tabriz, Iran
3
Geotechnical Department,Faculty of Civil Engineering,Tabriz university,Tabriz,Iran
Abstract
In this paper, the effect of the water-soluble polymer of cationic polyelectrolyte and Nano-clay nanoparticles on different properties of CL clay was investigated and compared. Nano-clay with 0.5, 1, 2 and 3% dry weight of soil and cationic polyelectrolyte with concentrations of 3, 6, 9 and 12 gr/liter based on optimum water content were added to the soil, and their effects on the soil details investigated in 3,7,14 and 28 days of processing. Compressibility, Atterberg Limits, unconfined compressive strength, free swelling, pH, and moisture retaining potential tests were performed on untreated soil samples, treated with Nano-clay and treated with cationic polyelectrolyte. Both materials caused an increase in optimum moisture, compressive strength, and moisture-retaining potential, and decreased Maximum dry density and swelling. Soil pH did not change significantly. For different amounts of cationic polyelectrolyte, besides of increases in plastic limit and liquid limit of soil, changes in soil plastic index were not remarkable. Also, Nano-clay had not much effect on Atterberg Limits up to 2%. And for 3% it increased liquid limit and plastic index of soil.
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