A performance-adjusting admixture of magnesium phosphate cement-based composite material

Abstract

The invention discloses a magnesium phosphate cement-based composite material property modifying additive. The additive comprises components in percentage by weight as follows: 9.8%-17.9% of an expanding agent, 4.9%-9.0% of a shrinkage reducing agent, 12.8%-23.3% of organic fibers, 1.4%-5.0% of a fiber dispersing agent, 20.1%-33.0% of a viscosity modifier, 12.2%-33.5% of a thickening time control agent and 4.4%-12.5% of a superplasticizer. The magnesium phosphate cement-based composite material property modifying additive comprises the simple components, the preparation technology is simple and rapid, the environment applicability is high, the usage method can be flexibly chosen according to construction site equipment and technology conditions, and construction operation and efficiency improvement are facilitated; a magnesium phosphate cement-based composite material prepared from the additive has the characteristics of wide thickening time control range, high mechanical property, good volume stability, excellent bonding property, good durability and the like, service performance of magnesium phosphate cement repair materials and reinforcement materials are greatly improved, and application and popularization of the 3D printing technology in the building field are particularly facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a performance-adjusting admixture for magnesium phosphate cement-based composite materials. Background technique [0002] Magnesium phosphate cement-based composite material is a new type of sustainable inorganic cementitious material based on the acid-base chemical reaction and physical interaction between magnesium oxide and soluble phosphate. In the 1980s, it received widespread attention from western countries, making magnesium phosphate cement-based composite materials show broad application prospects in emergency repair and construction and repair and reinforcement engineering applications. At the same time, with the recent application of 3D printing technology in the construction field, due to its good buildability, extrudability, cohesiveness and early strength characteristics, magnesium phosphate cement-based composite materials are used as 3D printing materia...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a magnesium phosphate cement-based composite material performance adjustment admixture, improve magnesium phosphate cement repair materials, reinforcement materials and 3D printing magnesium phosphate cement hard to control setting time, poor environmental applicability, poor volume stability, and poor bonding performance and poor durability

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