Abstract
The runoff of soil particles occurs severely during snow melting or rainfall in cold region.Freezing and melting cycles affect the soil structure and slaking properities. The authors investigated that the effect of calcium addition on the decrease in slaking percentage. Soil structure became stable after the addition of CaCl2 solution. As Ca(OH) 2 suspension was hardly to infiltrate the soil,Ca(OH)2 suspension was only effective to increase the stability of soil surface.However,the protection effect was remarkable when Ca(OH) 2 solid was mixed in the soil. It is possible to protect the consolidated slopes with the spreading CaCl2solution. Also, Ca(OH)2 solid should be mixed in the soil to protect the slopes at the reclamation.
