Plant fiber reinforced inorganic light composite and preparation method thereof

Abstract

The invention discloses a plant fiber reinforced inorganic light composite which is mainly prepared from magnesium chloride hexahydrate, magnesium sulfate heptahydrate, light calcined magnesia, water, a water reducer, a reinforcing agent, reinforcing fibers, a foaming agent, an exciting agent, a stabilizer and adjusting admixture. The preparation method comprises steps as follows: magnesium chloride hexahydrate, magnesium sulfate heptahydrate and water are mixed to be made into a saline solution; light calcined magnesia, the water reducer and the reinforcing agent are added to the saline solution, the mixture is stirred at a constant speed, and an inorganic sizing material is obtained; the reinforcing fibers are added to the inorganic sizing material and stirred at a constant speed, the adjusting admixture, the stabilizer and the exciting agent are dropwise added slowly, finally, the foaming agent is added quickly, the mixture is stirred at a high speed, and a foamed inorganic sizing material is obtained; the foamed inorganic sizing material is poured into a die, left to stand for foaming, removed from the die and maintained, and the plant fiber reinforced inorganic light composite is obtained. The composite has the advantages of high pressure resistance, high bending resistance, low density, no formaldehyde, aging resistance, mildew resistance, termite resistance, moisture-proof performance, no deformation, sound and heat insulation, good heat preservation and the like.

Description

technical field [0001] The invention belongs to the field of construction and decoration materials, and in particular relates to a plant fiber reinforced inorganic lightweight composite material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of high-rise buildings, in order to meet the requirements of thermal insulation and earthquake resistance and reduce the load of roof beams and columns, the demand for lightweight porous building composite materials is increasing. In the prior art, the preparation of lightweight composite materials is usually by adding a foaming agent to the cementitious material or mixing polystyrene foam, polyurethane foam, etc. with the cementitious material, but the strength of the lightweight material produced by this technology is not high , prone to cracking, collapse and other problems, and the fire performance is not high. Especially with the occurrence of more and more fire accidents...

AI Technical Summary

Problems solved by technology

The magnesium-based inorganic cementitious materials have become a new type of building material that has attracted much attention due to their high strength, fast coagulation speed, and excellent flame-retardant properties. However, due to uneven technical levels, the product quality is very low. Stable, so still needs improvement

[0003] Chinese patent application 201510469444 discloses an invention patent for fiber-reinforced composite materials, which uses plant fibers, but in this application, organic polymers are selected as the matrix material, and the main reinforcing fibers are glass fibers and inorganic whiskers. Fibers are added in the form of powder mainly for filling effect. It can be seen that the composite material of this invention is actually a wood-plastic composite material reinforced by glass fiber and inorganic whiskers, and the organic high molecular polymer mentioned in this application is a product of petroleum refining, which will intensify the world energy consumption

[0004] Chinese patent application 201510429245 discloses a method for preparing magnesia sulphoaluminate cement and fiber-reinforced composite materials. Although the board solves the problem of poor mechanical properties of magnesia sulphoaluminate cement, the composite board has a high density and poor thermal insulation performance, which makes it difficult to meet the needs of modern buildings for thermal insulation, shockproof, environmental protection and energy saving