Forming protective surface coating of sand asphalt in sandy soils

摘要

935,818. Soil stabilization; sub-aqueous walls. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. July 30, 1962 [Aug. 1, 1961], No. 29183/62. Classes 68 (1) and 68 (2). A protective surface layer of sand asphalt is formed over sandy soil by directing a jet of water on to the soil in such a way that the sand and water together are violently agitated to some depth, whilst bitumen emulsion is simultaneously directed at and entrained in the sand agitated by the water. The emulsion is preferably of a rapid-setting type containing a cationic emulsifier. Specification 838,840 is referred to.