CEMENT-BASED SOLIDIFYING MATERIAL FOR HIGH PRESSURE SPRAYING PROCESS, AND HIGH PRESSURE SPRAYING PROCESS

摘要

PROBLEM TO BE SOLVED: To provide a cement-based solidifying material for a high pressure spraying process which attains the reduction in the clogging at the pipeline, screen or nozzle part and the wear of the nozzle part in a foundation improvement execution machine, and a smooth improvement construction is achieved, and to provide a high pressure spraying process using the same.;SOLUTION: The cement-based solidifying material for a high pressure spraying process comprises portland cement and II type anhydrous gypsum powder, and in which the mass ratio of the portland cement/II type anhydrous gypsum is 0.5/99.5 to 8/92, and the water content in the II type anhydrous gypsum powder is 0.03 to 2 mass%.;COPYRIGHT: (C)2009,JPO&INPIT