Abstract: A grouting mix slurry with high sulfate resistant and retarding characteristics was specially developed for soils in a coastal area with high sulfate contents a complicated hydrological conditions. This grouting mix uses high sulfate resistant cement as a base matrix added with bentonite and bentonite, hydroxypropyl methyl cellulose, sodium hexametaphosphate as flyash in order to improve the stability, flowability, initial setting time as well as the sulfate resistance. The optimum mix design was obtained through the orthogonal experiments.

Key words: High Sulfate Resistant Cement, Stability Slurry, Retarder, Fly-ash