A kind of magnesium oxychloride cement and preparation method thereof
A technology of magnesium oxychloride cement and light-burned magnesia, which is applied in the field of magnesia cementitious materials, can solve the problems of easy deformation, frost return, and halogen return of products, and achieve the effect of stable phase structure, prevention of hydrolysis and performance loss
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Embodiment 1
[0031] Take by weighing light-burned magnesium oxide (active MgO content is 60%) 10kg, mass concentration is the magnesium chloride solution 3.58kg of 10%, coagulant calcium chloride 0.018kg, triethanolamine 0.02kg, retarder trisodium phosphate 0.05kg, 0.04kg of citric acid, 0.15kg of surfactant lignosulfonate, 0.8kg of industrial waste fly ash containing SiO2, 0.10kg of curing agent methyl methacrylate emulsion, 0.12kg of metal or metal oxide copper powder, 0.08 of manganese ore powder kg, high alumina cement, and 6.2 kg of water, calcined light-burned magnesia at 750°C for 1.2 hours, and then mixed all the ingredients to obtain magnesium oxychloride cement. After inspection, the pass rate of its brine and frost return is 95.5%, the pass rate of water resistance is 96.2%, and the qualified products will not deform for 5 years. The inspection method is as follows:
[0032] 1) Inspection of returning brine and returning frost.
[0033] Brine return and frost return are relati...
Embodiment 2
[0041] Take by weighing light-burned magnesium oxide (active MgO content is 60%) 10kg, mass concentration is 3.58kg of magnesium chloride solution of 10%, coagulant sodium sulfate 0.02kg, triethanolamine 0.02kg, retarder oxalic acid 0.04kg, phosphoric acid 0.04kg , surfactant naphthalate 0.1kg, containing SiO 2 0.6kg of industrial waste silica fume, 0.12kg of curing agent styrene-acrylic emulsion, 0.12kg of metal or metal oxide zinc oxide, 0.15kg of sodium methyl silicate, 0.15kg of high alumina cement, and 6.2kg of water. Calcined at 750°C for 1.2 hours, and then mixed all the ingredients to obtain magnesium oxychloride cement. The detection method is the same as that in Example 1, and the qualified rate of returning brine and frost is 96.2%, and the qualified rate of water resistance is 97.0%. Qualified products will not be deformed for 5 years.
Embodiment 3
[0043] Take by weighing 10kg of light-burned magnesium oxide (active MgO content is 60%), mass concentration is 3.58kg of magnesium chloride solution of 10%, coagulant aluminum sulfate 0.03kg, triethanolamine 0.03kg, retarder oxalic acid 0.03kg, zinc sulfate 0.03kg kg, surfactant ethyl silicate 0.04kg, containing SiO 2 1.0kg of industrial waste slag, 0.04kg of curing agent chlorine partial emulsion, 0.04kg of metal or metal oxide boron oxide, 0.06kg of rosin acid soap, 0.06kg of high alumina cement, 6.2kg of water, calcined light-burned magnesia at 750°C After 1.5 hours, mix all the ingredients evenly to obtain magnesium oxychloride cement. The detection method is the same as that in Example 1, and the pass rate of its return to brine and frost is 95.8%, and the pass rate of water resistance is 96.5%. Qualified products will not be deformed for 5 years.
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