Method for preparing building materials by utilizing industrial by-product gypsum
A technology of industrial by-product gypsum and building materials, which is applied in the field of comprehensive utilization of industrial by-product gypsum and aluminosilicate industrial waste to manufacture building materials. It can solve the problems of low strength and poor durability, achieve high strength and overcome fatal Defects, the effect of simple production process
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Embodiment 1
[0044] The specific surface area will be 600 m 2 / kg fluorine gypsum 400g (40%), specific surface area 600 m 2 / kg slag 300g (30%), specific surface area 780 m 2 / kgP·O42.5 50g (5%) of cement and 250g (25%) of river sand with a fineness modulus of 2.8 are dry mixed in a mixer for 3 minutes; then add 180g of water (18% of the dry mass of all solid materials) , an additional 1.5g of alkaline activator (accounting for 0.5% of the slag powder) was added to the water, and wet mixed for 10 minutes; after standing for 15 minutes, the pressure was maintained at 40MPa for 30s to obtain a super-strong material body; it was cured in a concrete curing room at room temperature and saturated water 28 days to get super high-strength material C 1 , after resting for 1 hour, curing in saturated steam at 100°C for 9 hours, the super-high-strength material C 2 , compressive strength see figure 2 .
Embodiment 2
[0046] Put 2500g of fluorogypsum and 2500g of phosphorus slag into a 500×500mm standard ball mill to grind for 50min to obtain a specific surface area of 650 m 2 / kg of mixture, take 620g of mixture (of which dry fluorine gypsum accounts for 31% of the total dry basis material, phosphorus slag accounts for 31% of the total dry basis material), and the specific surface area is 480 m 2 / kg P·O4 2.5 cement 80g (accounting for 8% of the total dry basis material) and 300g of river sand with a fineness modulus of 2.8 (accounting for 30% of the total dry basis material) are dry mixed in the mixer for 4min; then add 180g of water (plus the water brought in by gypsum accounts for 18% of the total dry material), add an additional 1.8g of alkaline activator (accounting for 0.6% of the CFB powder) in the water, wet mix for 8 minutes; after standing for 30 minutes, under 45MPa Hold the pressure for 15s to obtain a super-strength material green body; in the laboratory (temperature 20°C-31...
Embodiment 3
[0048] Put 2800g of fluorogypsum and 2200g of water-quenched slag into a 500×500mm standard ball mill to grind for 65min to obtain a specific surface area of 580 m 2 / kg of mixture, take 670g of mixture (of which fluorine gypsum accounts for 37.5% of the total dry basis material, water quenching slag accounts for 29.5% of the total dry basis material), and the specific surface area is 600 m 2 / kg P·O4 2.5 cement 90g (accounting for 9% of the total dry basis material) and 240g of machine-made sand with a fineness modulus of 3.2 (accounting for 24% of the total dry basis material) are dry mixed in the mixer for 3min; then add 200g of water (plus the water brought in by gypsum accounted for 20% of the total dry-based material), an additional 1.4g of alkaline activator (accounting for 0.47% of the water-quenched slag powder) was added to the water, and wet mixed for 9 minutes; after standing for 30 minutes, the Hold the pressure at 45MPa for 50s to produce a super-strength mater...
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Abstract
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