Low-heat micro-expansive cement

Abstract

The invention discloses low-heat micro-expansive cement and relates to the technical field of engineering materials. The low-heat micro-expansive cement is prepared by mixing the following components in parts by weight: 2-30 parts of vanadium-titanium mineral slag, 2-30 parts of phosphorus slag, 20-62 parts of granulated blast furnace slag, 18-45 parts of cement clinker, 7-15 of gypsum or anhydrite and 0.2-5 parts of other additives. The low-heat micro-expansive cement disclosed by the invention is adopted, thus vanadium-titanium slag resources are comprehensively utilized; and under the condition that the resources are deficient, the vanadium-titanium slag, the phosphorus slag and the like are used to replace the formula of the existing low-heat micro-expansive cement, thus production cost is reduced, and the physical property of the produced cement meets the requirement of GB2938 cement standard.

Description

[0001] technical field [0002] The invention relates to the technical field of engineering materials, in particular to a low-heat micro-expansion cement. Background technique [0003] The hydraulic cementitious material with low heat of hydration and micro-expansion properties made of granulated blast furnace slag as the main component, added with appropriate amount of Portland cement clinker and gypsum, is called low-heat micro-expansion cement. It is mainly suitable for concrete and mass concrete that require low heat of hydration and compensation for shrinkage, and is also suitable for projects that require impermeability and sulfate corrosion resistance. [0004] For example, the publication number is CN1175559, and the publication date is that the Chinese patent literature on March 11, 1998 discloses a low-heat micro-expansion cement whose raw material composition includes cement clinker, granulated blast furnace slag and phosphorus slag, hemihydrate gypsum or Sol...

AI Technical Summary

Problems solved by technology

[0005] Most of the existing technologies represented by the above-mentioned patent documents use high-quality granulated blast furnace slag as the main raw material, but because the high-quality slag resources required for the production of low-heat micro-expansion cement are becoming less and less, the price of granulated blast furnace slag is also increasing. The higher the increase, the higher the production cost of cement will be.