Inorganic binding material for assembled prefabricated parts, and preparation method and application thereof

Abstract

The invention provides an inorganic binding material for assembled prefabricated parts, and a preparation method and an application thereof. The inorganic binding material is prepared from a componentA and a component B, wherein the component A comprises, by weight, 50-100 parts of a magnesium compound, 15-35 parts of fly ash, 0.5-1.5 parts of a superplasticizer and 6-12 parts of a composite retarder; and the component B comprises, by weight, 15-30 parts of phosphate, 50-120 parts of quartz sands, 0.5-5 parts of fibers, 1-3 parts of a waterproofing agent and 3-6 parts of a pH stabilizer. Theinorganic binding material for assembled prefabricated parts has the advantages of adjustable solidification time, high bonding strength, high tensile strength, good bonding durability, low shrinkage,good weather resistance, good high temperature resistance, low cost and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to an inorganic bonding material for an assembled prefabricated component, a preparation method and an application. Background technique [0002] In recent years, with the rapid development of my country's real estate industry, bridges and tunnels and other engineering construction industries, and the increasing attention to housing industrialization, prefabricated components for housing, bridges and tunnels have begun to recover quietly. Assembled prefabricated components are one of the important directions for the development of my country's building structures. It is conducive to the development of my country's building industrialization, improving production efficiency and saving energy. For prefabricated structural systems, the construction of node connections between components is one of the key processes. Improving the bonding performance of component ...

AI Technical Summary

Problems solved by technology

From the perspective of binder types, ordinary cement-based binders mainly have problems such as long setting time, low early strength, poor bonding performance, easy shrinkage, and limited use environment. There are problems such as high cost, toxicity, poor environmental protection, poor durability, and complicated construction. Modified special cement-based, especially magnesium phosphate cement-based adhesives have early strength, match the properties of concrete materials, cure at room temperature, and have strong adhesion. and other characteristics, it has certain advantages in being used as a binder

However, magnesium phosphate cement still has some problems when it is used as the interface binder of prefabricated components: for example, when it is used alone, the setting is too fast, the setting time cannot be adjusted, the bonding strength is relatively low, the volume stability is poor, and the fluidity is poor, etc.

At present, most of the magnesia raw materials used in magnesium phosphate cement are dead-burned magnesia (magnesia), which is magnesite (MgCO 3 ) obtained by calcination at high temperature (above 1300 ° C), the energy consumption of raw materials is high, the carbon emission of processing is high, and it is not environmentally friendly, and the activity of dead-burned magnesia is low, and the reaction rate with phosphate salt is slow, so it is used in low temperature environment restricted

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