Treatment of Saline Soil with Soil Water Isolating Coagulant

Expansion problems occurred in many electricity substation yard site in Lanzhou, which caused severe cracking of adjacent concrete road and affectted the operation safety of the substation. A new soil water isolating coagulant (SWIC) was used to solve such problems. The water absorption, expansion in water, unconfined compressive strength, and softening coefficient of the specimen added different dosage of SWIC were tested after curing for 7 days. The results show that the addition of SWIC can significantly improve the unconfined compressive strength, whether air dried or immersed in water for 24 h. The softening coefficient which indicate the water resistance was improved, and the water absorption, water expansion were reduced. The infiltration of water and expansion problems can be effectively reduced as it was used in engineering.