Synergistic reaction of K⁺ and pllyvinyl alcohol on restraing swelling and hydrating behavior of expansive soil

K+ and pllyvinyl alcohol were choosen as the inhibition reagent on the hydrating and swelling behavior of expansive soil on the basis of the studies on crystalline swelling and osmosis swelling.Synergistic reaction of K+ and pllyvinyl alcohol which were thought friendly to the environment was proved by a series of tests.It would reduce the free swelling ratio,improve the granularity ingredient and enhance the stability in water.The composition of KCI solution of 7% with pllyvinyl alcohol of 0.6% was regarded as a reasonable proportion.