Inorganic cementing material with stable and coordinated development of strength and volume and application of inorganic cementing material

Abstract

The invention relates to the technical field of cement-based materials, in particular to an inorganic cementing material with stable and coordinated development of strength and volume and application of the inorganic cementing material. According to the inorganic cementing material provided by the invention, the mineral composition comprises C3S, C2S, C3A and C4AF, and the sum of the mass of the C3S and the mass of the C2S is less than 68% of the total mass of the inorganic cementing material; the sum of the mass of C3A accounts for 16-18% of the total mass of the inorganic cementing material. The inorganic cementing material disclosed by the invention has relatively high strength and better volume stability, and the blending mode is more time-saving and labor-saving, so that the inorganic cementing material has more guiding significance for practical application; besides, the inorganic cementing material has relatively high strength and volume stability, and the durability of a concrete structure can be remarkably improved when the inorganic cementing material is applied to concrete.

Description

technical field [0001] The invention relates to the technical field of cement-based materials, in particular to an inorganic cementitious material with stable and coordinated development of strength and volume and its application. Background technique [0002] At present, the direct and indirect emissions of carbon dioxide produced by the cement production process are relatively high. Therefore, developing high-performance inorganic cementitious materials and reducing the amount of traditional cement clinker is one of the important ways for the cement industry to achieve energy conservation, emission reduction and sustainable development. [0003] Existing research results show that the introduction of other mineral components (such as anhydrous calcium sulfoaluminate, ) or the deployment of composite cement (such as Portland-sulfoaluminate cement system), it has been verified that it can improve the early strength of cement, and at the same time improve the volume stabilit...

AI Technical Summary

Problems solved by technology

[0006](1) For the first type of front-end raw material deployment method, uncontrollable by-products are often generated during the calcination process, and effective minerals (such as anhydrous sulfoaluminate Calcium) has a large temperature difference between the calcination temperature and the calcination temperature of other minerals, often requires secondary calcination, the calcination process is complex and the stability of the mineral composition is poor, resulting in high energy consumption during the calcination process

[0007] (2) For the second product deployment method in the second stage, although it avoids the problem of high energy consumption for calcination, due to different types and grades of silicate There are deviations in mineral composition and content between sulfoaluminate and sulfoaluminate, so it is necessary to conduct multiple experiments to verify the optimal ratio, resulting in long time-consuming deployment and cumbersome operations; and according to experience, this method can improve volume stability at the same time It will lead to a decrease in the compressive / flexural strength of cement-based materials, especially in the late stage of hydration, there may be problems such as insufficient strength development and reduced durability

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