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

Abstract

The present invention relates to a method for preparing a new type of cement clinker, comprising the following steps: S01 obtaining raw materials, the raw materials comprising dolomite, clay and a mineralizer; S02 grinding and mixing the raw materials to obtain a mixture one; S03 adding The mixture is put into a calcining device for calcination at 800-1200° C. and kept at a temperature of 1-3 hours; S04 is cooled and ground after the calcination is completed to prepare. The cement clinker mainly contains MgO minerals with low exothermic C2S and expansion effect, and the micro-expansion generated after hydration makes up for the shrinkage of the cement.

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, and belongs to the field of cement minerals. Background technique [0002] Concrete is currently the most widely used building material in the field of construction, but it is often damaged due to various reasons before reaching the design life. One of the key factors is that the shrinkage of cement-based materials causes the volume of concrete to be unstable, which makes Concrete cracks and shortens its service life, and severe shrinkage cracking behavior can even lead to engineering accidents. Generally, the shrinkage behavior of concrete is caused by the shrinkage deformation of the contained cement-based material. At present, the amount of concrete materials is increasing rapidly, and the shrinkage behavior of cement-based materials in concrete has attracted the attention of domestic and foreign experts and scholars, an...

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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