Dihydrate desulfurized water-resistant gypsum heat-insulation mortar, and production method thereof
A technology for thermal insulation mortar and desulfurized gypsum, applied in chemical instruments and methods, sustainable waste treatment, solid waste management, etc., can solve problems such as unstable quality, secondary pollution, high investment, etc., to protect natural gypsum resources and save Effect of land resource and reduction of production cost
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[0032] The preparation method of dihydrate desulfurization water-resistant gypsum thermal insulation mortar of the present invention, its steps are:
[0033] 1) Decrease the attached water of dihydrate desulfurization gypsum by less than 15%, and then dry or air-dry;
[0034] 2) Simultaneously mix and stir with active material, excitation material, coagulation accelerator material and superplasticizer in proportion and measure to form composite gelling material.
[0035] 3) Take a certain amount of composite cementitious material, and then mix it with early strength agent, water retention agent, binder, lightweight aggregate, and air-entraining agent in proportion to form thermal insulation mortar.
[0036] 4) According to the amount of water (powder: water) 1:0.72 on site, mix and stir for 5 minutes, let it stand for 3 minutes, and then stir and use.
Embodiment 1
[0038] The raw material ratio of this example is:
[0039] 1. Original dihydrate desulfurization gypsum (dried or air-dried): 67%
[0041] Cement (42.5): 10.0%
[0042] Calcium oxide (250-350 mesh): 1.0%
[0044] F10 superplasticizer: 0.29%
[0045] Composite cementitious material is formed.
[0046] 2. Composite cementitious material: 300kg
[0047] Sulphoaluminate cement: 55kg
[0048] Hydroxypropyl methylcellulose: 0.8kg
[0049]Rubber powder 5044N (Wacker): 2.0kg
[0050] Polyvinyl alcohol (2488): 0.21kg
[0051] RN31 air-entraining agent: 0.06kg
[0052] Closed-cell perlite: 170kg
[0053] Test results: water consumption: 1:0.72, flexural strength: 0.5mpa, compressive strength: 0.95mpa, dry density: 465kg / m3, softening coefficient: 0.99, bond strength: 0.58mpa.
[0054] The preparation method of dihydrate desulfurization water-resistant gypsum thermal insulation mortar of the present invention is: ...
Embodiment 2
[0059] The proportioning raw materials of this example are:
[0060] 1. Original dihydrate desulfurization gypsum: 66.0%
[0061] Slag fine powder: 20.0%
[0062] Fly ash: 3.5%
[0063] 42.5 Cement: 8.0%
[0066] composite cementitious material
[0067] 2. Composite cementitious material: 350kg
[0068] Sulphoaluminate cement: 50kg
[0069] Hydroxypropyl methylcellulose: 0.8kg
[0070] Polyvinyl alcohol: 0.5kg
[0071] Rubber powder 5044N: 1.5kg
[0072] RN31 air-entraining agent: 0.06kg
[0073] Closed-cell perlite: 160kg
[0074] Test results: water consumption: 1:0.74, flexural strength: 0.35mpa, compressive strength: 0.725mpa, softening coefficient: 0.80, dry density: 490kg / m3, bond strength: 0.59.
[0075] The preparation method is:
[0076] 1) Mix the oven-dried or air-dried dihydrate desulfurized gypsum with slag powder, cement, calcium oxide, fly ash, and calcium formate according to the ratio and ...
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