Experimental study on dual-fluid-grout composite materials with slag steel modified Portland cement and sodium silicate

The effects of mass fraction of steel slag, water to binder ratio of single cemented paste, and volume ratio of double slurry on the working capability of dual-fluid gout were investigated. The optimum water to binder ratio of slag-modified Portland cement slurry is 0.6-0.8, and the optimal mass percentage range of steel slag with 20.4 μm average particle size in steel slag modified Portland cement slurry of 50%-80%. There exits an appropriate volume ratio of 4:1-6:1 between slag-modified cement slurry and sodium. According to above parameters the steel slag modified cement-silicate dual fluid gout was prepared and cured in water for 3 days after demolding, whose early average compressive strength and corresponding softening coefficient are over 40 MPa and 0.80 respectively.