Foaming magnesium cement EPS particle grade A noncombustible board and preparation method thereof

Abstract

The invention discloses a foaming magnesium cement EPS particle grade A noncombustible board. The foaming magnesium cement EPS particle grade A noncombustible board is characterized by being prepared from the following raw materials by weight: 80Kg of magnesium oxide, 5Kg of magnesium sulfate heptahydrate, 500g of nekal, 500g of calcium stearate, 10Kg of silicified straw fiber, 20Kg of hydroxyl mineral fibers, 18Kg of EPS particles, 500g of borax, 10Kg of nanofiber gypsum, 20Kg of sepiolite powder and 20Kg of magnesium chloride, wherein the silicified straw fiber is formed by spraying the mixed emulsion of sodium silicate and sodium chloride on the surface layer of the straw fibers for permeating. The preparation method comprises the steps of firstly adding water to the raw materials and stirring, secondly adding the nekal and stirring for foaming, and finally adding the EPS particles and stirring, injecting into a mold for molding, and curing at the normal temperature of 25 DEG C. The foaming magnesium cement EPS particle grade A noncombustible board prepared from the following raw materials is fireproof and thermal insulating, and reaches the fire protection glade A2. Besides, the board is good in thermal insulation properties, high in compressive strength and strong in adhesion stress.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a novel foamed magnesium cement EPS grain A grade non-combustible board. Background technique [0002] Foamed cement belongs to the closed-cell honeycomb inorganic heat insulation material. Its outstanding feature is that a large number of closed cells are formed inside the cement, which makes the cement material lighter and heat-insulating. At the same time, this honeycomb structure also makes it have A certain intensity. Due to the continuous deepening of research and development, the use of the latest cement foaming technology has been able to produce lower density foamed cement products, such as our company's ordinary Portland cement foamed insulation board, the minimum density has reached 150kg / m3, and the thermal conductivity ≤0.06w / (m·K). It can be seen that compared with air-entrained concrete, foamed cement has a lower density and lighter weight,...

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Problems solved by technology

However, the above-mentioned materials have the phenomena of back-halogenation, poor water resistance, warping deformation, hardening body swelling and frosting, which limit their use.

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