Cementing material with strength grade of above 200MPa and preparation method thereof

Abstract

The invention belongs to the field of building materials and particularly relates to a cementing material with a strength grade of above 200MPa and a preparation method thereof. The technical scheme includes that the cementing material with the strength grade of above 200MPa is composed of ordinary silicate clinker serving as a raw material and an appropriate mixture prepared by superfine slag powder, metakaolin, microbeads, carbon-free rice hull ash, fine limestone powder, calcined magnesium oxide, viscosity breaking and plastic retaining agent (zeolite powder and sodium gluconate) and fibers according to a certain ratio. The compressive strength and the breaking strength of the cementing material with the strength grade of above 200MPa exceed those of ordinary silicate cementing material. If the cementing material is applied to over-C100 ultra-high strength concrete, shrinkage and viscosity of the concrete can be greatly reduced, and durability of the concrete can be improved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a cementitious material with a strength level above 200 MPa and a preparation method thereof. Background technique [0002] Cement materials have always been a research hotspot in the building materials industry. There are many types of cement. With the rapid development of domestic and foreign projects, some projects have higher and higher requirements for cement. At present, ordinary cement has low strength and poor performance, and its application range is greatly restricted. Many projects not only require cement to be stronger and stronger, but also require super early strength and super high strength. [0003] The low strength of traditional cement is mainly due to the large pores in the cement products, which are mainly formed by the excess free water in the cement. In order to solve this problem, it is mainly achieved by adding mineral admixtures, polymers, r...

AI Technical Summary

Problems solved by technology

[0004] A high-strength composite cementitious material is disclosed in the existing patent. The sulphoaluminate cement and high-alumina cement used in the document are all rapid-hardening special cements, which are characterized by early strength, but have defects such as poor durability and easy cracking.

The components disclosed in the document contain a large amount of organic materials such as polymers and coupling agents, which are high in cost, poor in thermal stability, and poor in resistance to external environmental erosion.

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