Desulfurization gypsum basic steel slag composite gelled material and preparation method thereof
A technology of composite cementitious material and desulfurized gypsum, which is applied in the field of desulfurized gypsum-based steel slag composite cementitious material and its preparation, can solve the problems of low utilization rate of steel slag and desulfurized gypsum, and facilitate large-scale production, improve utilization rate, alkali moderate effect
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Embodiment 1
[0036] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:
[0037] Take the specific surface area as 3800-4000cm 2 / g, the fineness is 300 mesh desulfurization gypsum 850g, the specific surface area is 3000-4500cm 2 / g, the fineness is 300 mesh steel slag 150g, and the activator is 20g, and the activator is mixed with sodium silicate, kaolin, and potassium aluminum sulfate respectively accounting for 20%, 30%, and 50% of the weight of the activator.
[0038] Prepared in the following way:
[0039] (1) Grinding the steel slag in a Φ500×500mm test mill for 2-4 hours, sieving it for later use; sieving the desulfurized gypsum to remove large particles for later use;
[0040] (2) measure the standard consistency water consumption of the cementitious material with a gypsum plaster consistency meter, measure the water of the standard consistency water consumption with a measuring cylinder, pour it into the st...
Embodiment 2
[0044] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:
[0045] 650g of desulfurization gypsum, 350g of steel slag, and 1g of activator, the activator is mixed with sodium silicate, kaolin, and potassium aluminum sulfate, respectively accounting for 20%, 30%, and 50% of the weight of the activator.
[0046] The preparation method is the same as that of Example 1, except that the curing method is changed to the standard curing of a temperature of 20±2° C. and a humidity of 95%.
Embodiment 3
[0048] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:
[0049] 900g of desulfurization gypsum, 100g of steel slag, and 10g of activator, the activator is mixed with sodium silicate, aluminum sulfate, kaolin, and potassium aluminum sulfate, which account for 9%, 30%, 30%, and 31% of the weight of the activator, respectively. to make.
[0050] The preparation method is the same as Example 1, except that the curing method is changed to natural curing in the air (temperature 20±2°C) for 1 day, and then put into a curing box for standard curing (temperature 20±2°C, humidity 95%).
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