Concrete additive

Abstract

The invention discloses a concrete additive. The concrete additive comprises the active ingredients of: 10-20 parts of polymeric polyol, 10-20 parts of polyether alcohol amine, 25-30 parts of triethanolamine and 20-30 parts of a porous nano modifying material mixture, wherein the nano mixture comprises a hybrid NA-BTC nano porous material and a SiO2@COF nano material. The cement additive is formedby the composition of the polymeric polyol, polyether alcohol amine, triethanolamine and 20-30 parts of the porous nano modifying material mixture, so that the fluidity of cement is improved greatly,and the porous nano modifying material mixture mainly comprises the hybrid NA-BTC nano porous material and SiO2@COF nano material; due to a special network skeleton structure, the concrete additive can adheres to the cement, and has strong hydrophilicity, so that the fluidity of the cement is improved greatly.

Description

technical field [0001] The invention relates to a concrete additive. Background technique [0002] With the development of machinery and equipment in the direction of large-scale and precision, equipment installation has put forward higher requirements for precision and speed, and the technical and economic requirements for materials used in foundation grouting, steel bar reinforcement\engineering reinforcement are more urgent. For this reason, the inorganic grouting material that is used for purposes such as crack repair and equipment installation begins to be developed at home and abroad since the 1980s. Cement-based grouting material is a special construction dry powder mortar with cement, sand, admixture, etc. as the main raw materials. After being evenly mixed in the factory, it is transported to the site and can be used directly after adding water and mixing. It has good durability, high fluidity, and high strength. , No shrinkage and other advantages. [0003] Howev...

AI Technical Summary

Problems solved by technology

[0003] However, when the existing grouting materials are in use, when some large-scale and super-large equipment are installed in actual projects, due to the very large mass of the equipment itself and the heavy load during operation, the early and late compressive strength and fluidity of the grouting materials will be affected. raised higher demands

Insufficient fluidity will cause the grouting material to fail to fill the entire space, resulting in multiple voids, or even grouting voids; and the grouting material will foam after being stirred with water, so there will be a gap between the equipment base and the grouting layer, which will affect the connection between it and the equipment base. Density

Therefore, the existing cement-based grouting materials can no longer meet the requirements

Moreover, the existing grouting materials still have the problems of easy cracking and shrinkage, insufficient early plastic expansion of the grouting material, small effective bearing surface with the matrix, surface voids, and slow strength development in the later stage.

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