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Ionic soil stabilizer was used to reinforce expansive soil and improve its working performance. 4 groups of stabilized soil with different mixture proportion were designed to investigate the effects of improvement. The expansibility and strength of stabilized soils were studied through a series of tests. The chemical composition, cation exchange capacity, microstructure and BET surface area were tested...
There are more than 55 kilometers subgrade in NGZQ-5 section of Nanning-Guangzhou high-speed railway passenger dedicated line. A large number of filling material along the construction section is high expansive clay soil, and it must be improved by physical or chemical methods. The liquid and plastic limits, expansibility, mechanical strength and water stability of expansive soil is studied. The results...
According to the existing theories of soil mechanics and fluid mechanics, as well as the features about the water and soil curves of unsaturated expansive soil. It is obtained the equations about gaseous water transfer and liquid water transfer of unsaturated expansive soil. It is be seen from coefficients in the equation that water migration bringing water content changes relating to moisture gradient,...
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