Method for preparing building insulation material employing straws and bamboo poles

Abstract

The invention discloses a method for preparing a building insulation material employing straws and bamboo poles, and belongs to the field of building insulation materials. The agricultural wastes straws and bamboo poles are utilized to the maximal extent; and the building insulation material has heat preservation and insulation properties, fireproof and flame-retardant properties and antiseptic and mildew-proof effects, and can be applied to the requirements of urbanization and new rural construction. The mechanical strength is improved by virtue of the bamboo poles; the breaking strength is improved; in addition, the heat conductivity coefficient can be effectively reduced; the bamboo is a hollow material has relatively small heat conductivity coefficient, and the straws and the bamboo poles are compounded together, so that the heat conductivity coefficient of a building material product is reduced. The problems of interface characteristics, corrosion prevention and water absorption of the straws and the bamboo poles are solved by a silane coupling agent and an acrylic resin emulsion; and an inorganic cementing material and the combining capacity thereof are improved by the coated isolation effect. Through technological innovation and innovation of a preparation method, the straw-bamboo pole-inorganic composite building insulation material with excellent performance is prepared; the volume usage of the straws in the building material can reach 50%-80%; and full utilization of the straws is realized.

Description

technical field [0001] The invention belongs to the field of building thermal insulation materials, and utilizes agricultural residues such as straw and bamboo poles to the greatest extent, together with inorganic gelling materials and auxiliary additives, and the prepared building thermal insulation materials have thermal insulation, fire and flame retardancy, anticorrosion and mildew resistance, and can be used for urbanization and new rural construction needs. Background technique [0002] China has a vast territory, with 1.8 billion mu of arable land, and is a large agricultural country. There are about 800 million tons of agricultural residues produced every year, ranking first in the world, of which rice straw accounts for about 200 million tons, wheat stalks account for about 150 million tons, and corn stalks account for about 300 million tons. [0003] As the use of traditional fires and grazing declines, large agricultural surpluses are underutilized. The amount o...

AI Technical Summary

Problems solved by technology

At present, the product forms that have been developed include: wood-based panels, degradable tableware, straw matches, conversion into alcohol, production of carbon black, and lightweight wall panels. The above-mentioned conversion products consume less than 5% of agricultural residues and are limited by various conditions Not yet widely available

[0013] At present, there are still the following problems in the composite of agricultural residues and inorganic cementitious materials: (1) Agricultural residues contain a large amount of lignin, cellulose and sugars, which are highly hydrophilic, and the agricultural residues swell after absorbing water, making Agricultural residues and inorganic gel materials are destroyed before forming a firm bond, which affects the overall strength of building materials

If sugar and degreasing work is adopted to address the above problems, the process, equipment and cost will increase. For building materials, it is difficult to be economically feasible, and ultimately it will not be able to form large-scale application and promotion.

(3) The volume of agricultural residues added to inorganic composite building materials is generally between 10% and 30%, which cannot solve the problem of a large amount of agricultural residues.

(4) The mechanical properties of inorganic composite agricultural residues are relatively weak, especially the worst bending performance, only 1-2MPa, which is severely broken during the handling process, and the loss is even more serious when producing large-size plate products

(6) Inorganic composite agricultural residue building materials are still insufficient in terms of anti-corrosion and anti-mildew, and have not attracted enough attention, resulting in restrictions on application in humid environments, mainly due to poor anti-corrosion and anti-mold technology for agricultural residues. of

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