Novel cement clinker, preparation method of cement clinker and anti-shrinkage-cracking low-heat Portland cement

Abstract

The invention relates to a novel cement clinker preparation method, which comprises: S01, obtaining raw materials, wherein the raw materials comprise dolomite, clay and a mineralizing agent; S02, grinding and mixing the raw materials to obtain a mixture I; S03, putting the mixture I into calcining equipment for calcining at the temperature of 800-1200 DEG C, and conducting heat preservation for 1-3 hours; and S04, after calcining is finished, conducting cooling and grinding, so as to obtain the cement clinker. The cement clinker mainly contains low-heat-release C2S and MgO minerals with an expansion effect, and shrinkage of cement is compensated by micro-expansion generated after hydration of the cement clinker.

Description

technical field [0001] The invention relates to a cement clinker, a preparation method of the clinker and Portland cement prepared by using the clinker, belonging to the field of cement minerals. Background technique [0002] Concrete is currently the most widely used building material in the construction field, but it often suffers from various types of damage before reaching the design life. One of the key factors is that the shrinkage of cement-based materials leads to the instability of concrete volume, which makes Concrete cracks and shortens its service life, and severe shrinkage cracking behavior can even lead to engineering accidents. Usually, the shrinkage behavior of concrete is caused by the shrinkage deformation of the contained cement-based materials. At present, the amount of concrete materials is increasing rapidly, and the shrinkage behavior of cement-based materials in concrete has attracted more and more attention from experts and scholars at home and abro...

AI Technical Summary

Problems solved by technology

However, ettringite and calcium oxide have the disadvantages of large water demand for hydration, unstable physical and chemical properties of hydration products, and uncontrollable expansion process. Although the water demand of magnesium oxide expansion agent is relatively small, all these admixtures can be used in the production process. Consumes a lot of energy, failing to achieve the purpose of energy saving and environmental protection

At the same time, the external mixing process is complicated, and these defects restrict the application of expansion agents in concrete (especially mass concrete)

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