A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a cement early-strength admixture which contains 34-58% of anhydrous calcium sulphoaluminate and 42-66% of monocalcium aluminate. The cement early-strength admixture is free of organic matters. The preparation method comprises the following steps: uniformly mixing calcic waste, bauxite and desulfurized gypsum, adding water (the water-to-cement ratio is 0.3-0.42), grinding for 4-7 hours, pouring the slurry into a mold, forming, and demolding to obtain a sample; and carrying out isothermal curing on the sample at 65-95 DEG C for 15-24 hours, cooling, crushing, calcining at 800-1000 DEG C for 60-120 minutes, taking out, quenching, and milling to obtain the cement early-strength admixture. The early-strength admixture prepared by the method provided by the invention has the advantages of early strength and setting acceleration, and does not need to add any organic matter which is harmful to the human body.
The invention discloses a cement early-strength admixture which contains 34-58% of anhydrous calcium sulphoaluminate and 42-66% of monocalcium aluminate. The cement early-strength admixture is free of organic matters. The preparation method comprises the following steps: uniformly mixing calcic waste, bauxite and desulfurized gypsum, adding water (the water-to-cement ratio is 0.3-0.42), grinding for 4-7 hours, pouring the slurry into a mold, forming, and demolding to obtain a sample; and carrying out isothermal curing on the sample at 65-95 DEG C for 15-24 hours, cooling, crushing, calcining at 800-1000 DEG C for 60-120 minutes, taking out, quenching, and milling to obtain the cement early-strength admixture. The early-strength admixture prepared by the method provided by the invention has the advantages of early strength and setting acceleration, and does not need to add any organic matter which is harmful to the human body.
European Patent Office | 2017