Light-burned dolomite cement

Abstract

The invention discloses light-burned dolomite cement which comprises the following components in parts by weight: 100 parts of light-burned dolomite, 10-50 parts of industrial waste slag, 10-40 parts of reinforcing and thickening agent and 0.5-15 parts of water resistant additive. The light-burned dolomite cement has the advantages of solidification quickness, strengthening earliness, high strength, good water resistance and freeze resistance, consumes a large quantity of industrial slag, conforms to the environmental protection requirement and has wide raw material resource.

Description

technical field [0001] The invention relates to a cement, in particular to a light-burned dolomite cement with fast setting, early strength, high strength, good water resistance and frost resistance. Background technique [0002] Ordinary Portland cement is currently widely used as a cementitious material, but the temperature of burning Portland cement clinker is as high as 1450°C, which consumes a lot of high-quality limestone, clay, iron powder and other raw materials, and every ton of cement produced has to be discharged 1 ton of carbon dioxide gas aggravates the greenhouse gas effect of the earth, so it is an unsustainable cementing material with high consumption, high energy consumption and high pollution. In order to reduce energy consumption, it is of great social and practical significance to adopt other low-consumption, low-energy-consumption, and low-pollution cementing materials such as gypsum and light-burned magnesia cement. However, the gypsum cementitious mat...

AI Technical Summary

Problems solved by technology

However, the gypsum cementitious material has low strength and poor water resistance, so it is difficult to truly replace the existing ordinary Portland cement. However, light-burned magnesia cement mixed with magnesium chloride or magnesium sulfate solution has great application value and market prospects.

Chinese invention patent ZL00122936.2 discloses an aluminum-silicon-magnesium cement, which consists of 100 parts of magnesium oxide, 80 parts of fly ash, 60 parts of river sand, 80 parts of 25-degree magnesium chloride solution, 4.4 parts of sodium silicate, and 4.4 parts of silicic acid sol (solution), 8.8 parts of 18-degree aluminum sulfate (solution), 88 parts of 28-degree magnesium sulfate (solution), and 8.8 parts of 30-degree sulfuric acid (solution) are mixed and prepared, but the composition of this patented product contains both powder and It has a solution and contains sand at the same time, and it can only be mixed and used on the construction site or in the factory workshop. In fact, it belongs to a kind of magnesia cement wet-mixed mortar, which does not belong to the cement cementitious material in the strict sense, and cannot be packaged as a kind of Cement products in the modern sense

In addition, the sources of magnesium oxide in the above-mentioned patented products are concentrated in Haicheng City and Dashiqiao City of Liaoning Province and Laizhou City of Shandong Province in my country. They are obtained by calcination of magnesite. Due to geographical limitations, it is difficult to promote and apply nationwide

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