Experimental Study on Ionic Soil Stabilizer Reducing Adsorbed Water of Clay

摘要

With fast research and development, economic and effectual methods and theories about reducing adsorbed water of clay have been the focal point of all over the world all the time. This experiment studies and uses a new kind of economic and suitable Ionic Soil Stabilizer (ISS for short). How to reduce the adsorbed water of clay is researched. Two kinds of different clays are treated by different matches of ISS and water at first. Then the Atterberg limits test, direct shear test, shrinkage test, free swell test, zeta potential and cation - exchange capacity test are carried on. A lot of results are achieved: when the plastic index decreases, the cohesion increases in the sliding soil of landslide; when the shrinkage limit decreases, the free swell falls and the zeta potential and cation - exchange capacity decrease in the red clay after mixed the ISS. The mechanism is that the clay soil is mixed the ISS, which can replace the exchangeable cation of clay particle surface, change the pair-electricity layers of clay soil particle surface, decrease the thickness of adsorbed water, reduce the cation - exchange capacity, and transfer the hydrophilic clay soil to the hydrophobic by the function of physics and chemistry. National Natural Science Foundation of China (No. 40672188).