Magnesium phosphate cement-base porous material and preparation method thereof

Abstract

The invention discloses a magnesium phosphate cement-base porous material and a preparation method thereof. The preparation method is characterized by comprising the following steps: taking the following raw materials in parts by mass: 5-40 parts of dead burnt magnesite, 10-35 parts of ammonium dihydrogen phosphate, 2-15 parts of borax, 10-60 parts of fly ash, 10-60 parts of quartz sand, 0.3-1 part of metallic zinc or iron powder and 5-20 parts of water; uniformly mixing the dead burnt magnesite, ammonium dihydrogen phosphate, borax, fly ash, quartz sand and metallic zinc or iron powder to obtain a powder mixture; adding the powder mixture into a container with a stirring device, adding water while starting time keeping, stirring slowly for 15-30 seconds, stirring quickly for 1.5-3 minutes, stopping stirring for 15 seconds, and stirring quickly for 3-5 minutes to obtain a slurry; and forming the slurry, and curing to obtain the magnesium phosphate cement-base porous material. The porous material disclosed by the invention has the advantages of early strength, quick hardening, favorable acid / alkali attack resistance, favorable thermal-insulation property, low carbon and environment friendliness, and is mainly used as a thermal-insulation material.

Description

technical field [0001] The invention belongs to inorganic thermal insulation materials, and relates to a magnesium phosphate cement-based porous material and a preparation method thereof. The invention uses magnesium phosphate cement to prepare phosphate cement-based porous material in a metal air-entraining manner, and the prepared porous material product is mainly used as thermal insulation material. Background technique [0002] Thermal insulation materials can be used to reduce indoor and outdoor heat loss and effectively reduce air-conditioning loads, and are an important part of building energy conservation. With the improvement of the country's requirements for building insulation materials, inorganic insulation materials have a good development prospect. In the prior art, building heat insulation materials mainly include polystyrene board, rock wool board and ordinary foamed concrete. It is an inorganic fiberboard made of high-temperature melting as the main materi...

AI Technical Summary

Problems solved by technology

Since the polystyrene particles in the polystyrene board are flammable, the foam board can only be flame-retardant and fire-resistant, with the highest grade of B1. The high temperature of the extruded board production process leads to the decomposition of some flame retardants, resulting in poor fire resistance.

The activity of basalt in rock wool board is low, resulting in low strength

Ordinary foam concrete has high requirements on the foaming process, and requires 18 to 24 hours for curing. It has the defects of low strength and poor fire resistance. Therefore, it is urgent to develop a new type of energy-saving thermal insulation material with high strength, non-combustibility, good chemical stability, and environmental friendliness.

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