Anti-freezing anti-cracking cement foaming heat preservation board

Abstract

The invention relates to the technical field of heat preservation construction materials, in particular to an anti-freezing anti-cracking cement foaming heat preservation board. The heat preservationboard is prepared from cement, coal dust, water glass, a cold-resistant flexibilizer, aluminum oxide fibers, a foaming agent, a foam stabilizer, a water reducer, an anti-freezing agent and water, wherein the cold-resistant flexibilizer is a novel material compound by various elastic materials, high-hardness fillers and the like. Cement is a mixture made by blending Portland cement with magnesium oxychloride cement according to a mass ratio of 8:1; the water reducer is a lignin water reducer or a poly-carboxyl water reducer or a melamine water reducer; the foaming agent is hydrogen peroxide; the foam stabilizer is calcium stearate; the anti-freezing agent contains propylene glycol butyl ether, glycol butyl ether acetate and diethylene glycol. The thermal conductivity of the heat preservation board is low, and the heat preservation performance is great. The cold-resistant anti-freezing performance of the materials is great, the tenacity is high, and the heat preservation board is not easily fractured at low temperature.

Description

technical field [0001] The invention relates to the technical field of thermal insulation building materials, in particular to a frost-resistant and crack-resistant cement foam thermal insulation board. Background technique [0002] With the continuous development of energy-saving work in residential construction in my country, building energy-saving methods of external wall insulation are becoming more and more popular. However, the plastic foam building insulation materials currently used on a large scale, such as extruded board, polyurethane foam, rubber powder polystyrene particles, phenolic foam board, modified phenolic fireproof insulation board, etc., will emit thick smoke and other harmful gases when burning. In order to prevent fire or control dense smoke, they added flame retardants, curing agents, smoke suppressants, etc., but none of them solved the fundamental problem. The inherent properties of organic substances determine that these materials have relatively ...

AI Technical Summary

Problems solved by technology

[0004] Conventional cement foam insulation board has the advantages of low thermal conductivity, good heat preservation effect, outstanding wear resistance, good adaptability, and high early strength. However, the cold resistance and frost resistance of cement foam insulation board are generally poor, and the toughness of the board is insufficient. ;It is more brittle at low temperature, so the insulation board is easy to crack and fall off

Moreover, with the prolongation of use time, the strength of cement foam insulation board is more obvious, and the durability is relatively insufficient.

[0005] Invention patent authorization announcement number CN103739253B announced a vitrified micro-bead cement foam insulation board and its preparation method. A vitrified micro-bead is added to the technical solution, and its light weight and hollow characteristics are used to improve the heat preservation of the insulation board. performance, reducing the density of the insulation board; but this cement foam insulation board still has the disadvantages of poor frost resistance, insufficient toughness, and easy aging and cracking

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