High-strength fiber reinforced foamed cement insulation board and preparation method thereof

Abstract

The invention relates to a high-strength fiber reinforced foamed cement insulation board and a preparation method thereof. The foamed cement insulation board is mainly prepared from water and the following raw materials by weight: 95-96 parts of ordinary Portland cement, 4.0-5.0 parts of silica fume, 0.50-0.60 part of a water reducing agent, 6.0-7.0 parts of a foaming agent hydrogen peroxide, 1.6-2.0 parts of calcium stearate, 0.5-0.6 part of a coagulant, 5.5-6.5 parts of microcrystalline foam glass slag, 7.0-8.0 parts of a styrene-acrylic emulsion and 0.45-0.60 part of polypropylene fiber; wherein the water-binder ratio is 0.55-0.57. According to the invention, the microcrystalline foam glass slag and the styrene-acrylic emulsion are used as inorganic-organic reinforcing materials, the obtained high-strength fiber reinforced foamed cement insulation board is good in appearance quality, low in heat conductivity coefficient, good in heat preservation and insulation performance, fireproof and flame-retardant performance, high in strength, low in volume water absorption, good in freeze-thaw cycle resistance, good in durability and long in service life.

Description

technical field [0001] The invention belongs to the technical field of foamed cement boards, and in particular relates to a high-strength fiber-reinforced foamed cement insulation board and a preparation method thereof. Background technique [0002] In recent years, civil buildings, especially commercial housing construction industry, have developed rapidly, and high-rise and super high-rise buildings have emerged continuously; for the purpose of weight reduction, heat insulation and energy saving, the external insulation materials of building exterior walls are mostly organic materials, such as polystyrene Foam (EPS), extruded polystyrene foam (XPS), polyurethane foam (PU), etc. Although these organic materials have good thermal insulation performance, they have poor heat resistance and are easy to burn. Because the external wall insulation structure is often continuous Yes, once a fire burns somewhere, the flame will quickly spread up and down, and burn left and right. The...

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Problems solved by technology

[0005] In the prior art, in order to pursue the light weight and low price of the foamed cement insulation board and meet the use standard of the ultra-light board, the thermal conductivity of the board is reduced by reducing the dry apparent density of the board, and the foaming strength is increased to increase the porosity of the board. The mechanical properties and strength tend to drop sharply. At the same time, due to the increase of open pores, connected pores and micro-cracks, the water absorption rate of the board will also increase sharply. Higher water absorption rate will further reduce the strength and durability of the foamed cement insulation board. Shorten Its service life also limits its construction in winter and its promotion and use in cold regions

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