Fast setting cement and its preparation method and application

Abstract

The invention discloses rapid-condensation hard cement as well as a preparation method and application thereof. The rapid-condensation hard cement is prepared from the following raw materials in percentage by mass: 56 to 62 percent of Al2O3, 37 to 43 percent of CaO, 0.01 to 0.5 percent of SiO2 and 0.01 to 0.5 percent of Fe2O3. The preparation method of the rapid-condensation hard cement speciallycomprises the following steps: (1) stirring the raw materials in all proportions at high speed until the raw materials are evenly mixed to obtain a blank material; (2) slowly putting the blank material into an electric arc furnace, and heating to 1600 DEG C; (3) blowing high-pressure air and quickly cooling the heated blank material to obtain a ripe material; (4) pulverizing the ripe material; (5)performing separation to obtain fine powder to obtain a final product. The invention also discloses application of the rapid-condensation hard cement in building materials. The rapid-condensation hard cement disclosed by the invention is low in cost, has simple procedures, and is convenient and quick to operate; moreover, the cement can be rapidly condensed during natural ventilation, external circulation water connecting packaging, high-pressure air blowing and cooling, and the problem of difficult construction of the concrete in winter is solved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fast setting cement and its preparation method and application. Background technique [0002] The strength of concrete is derived from the hydration reaction between cement and water, which then produces a colloidal compound that binds steel bars and sand and gravel. The most basic requirement of hydration reaction is water and suitable temperature, and the rate of hydration decreases as the temperature drops. When the water is lower than 0°C, the water begins to expand, which will cause certain damage to the concrete structure. When the temperature When it continues to decline, the moisture in the concrete begins to change from liquid phase to solid phase, and the moisture that can participate in the hydration of cement becomes relatively less, the hydration in cement decreases, and the degree of strength growth of cement decreases accordingly. If the temperature co...

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Problems solved by technology

[0005] The above methods ensure the quality of cement construction in winter, but the cost is high, the process is complicated, and the operation is cumbersome

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