Basic magnesium oxysulfate composite cementing material double-doped with fly ash and mineral powder and preparation method

• Main Authors: GAO JIANMING, HE DONGLING
• Format: Patent
• Language: Chinese; English
• Published: 30.07.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention provides a basic magnesium oxysulfate composite cementing material double-doped with fly ash and mineral powder. The basic magnesium oxysulfate composite cementing material is prepared from the following raw materials in parts by weight: 49.7 to 66.6 parts of light calcined magnesia powder, 24.4 to 32.8 parts of magnesium sulfate heptahydrate, 4 to 19.1 parts of fly ash, 2 to 12.7 parts of mineral powder and 0.5 to 0.6 part of citric acid. According to the invention, the fly ash and the mineral powder are used as raw materials to prepare the magnesium oxysulfate composite cementing material, so that the preparation cost of the cementing material is reduced, resources are saved, and meanwhile, the application of the magnesium oxysulfate cement in the market is expanded. In addition, the prepared cementing material can effectively improve the mechanical strength of cement, reduce volume shrinkage and improve the volume stability and water resistance of the cement. 本发明提供了一种双掺粉煤灰和矿粉的碱式硫氧镁复合胶凝材料，其原料以