Lightweight antifreezing straw fiber thermal insulation wallboard and manufacturing method therefor

Abstract

The invention discloses a lightweight antifreezing straw fiber thermal insulation wallboard and a manufacturing method therefor. On the one hand, straw fibers are subjected to high temperature steam pretreatment, then part of pectin is removed, acetic acid is added, acetylation treatment is carried out, free hydroxide radicals in cellulose are enclosed, the hydrophobic performance and the thermal stability of the material are raised, then a waterproof agent immersion method is employed for processing, the material water absorption is lowered, the alkali corrosion resistance of the material in a cement-based material is raised and the capability of resisting microorganisms from depolymerization is raised. On the other hand, wastes of fly ash, iron ore tailings, ceramic polishing residues and the like are modified, utilized, and blended with sulfonated ethylene propylene rubber, granulation is carried out, the intensity and the toughness of the product are raised, the product is not easy to fracture, the thermal insulation wallboard prepared according to the method is low in cost, the added modified straw fibers can absorb released energy when a cement-based material cracks, therefore extension of the crack in the cement-based material is stopped, namely, the toughness of the material is raised, the compression toughness index is raised, and the provided thermal insulation wallboard has advantages of antifreezing, ventilation and good warmth retention.

Description

technical field [0001] The invention relates to the technical field of building thermal insulation materials, in particular to a light-weight frost-resistant straw fiber thermal insulation wallboard and a manufacturing method thereof. Background technique [0002] At present, external wall insulation is mainly used for external wall insulation in my country. Compared with internal insulation, it effectively reduces the "thermal bridge" of the building structure, increases the effective space of the building, eliminates condensation, and improves the comfort of living. Moreover, the external thermal insulation technology is not only applicable to new structural projects, but also to renovation projects of old buildings, with a wider scope of application and higher technical content. Currently used external wall insulation materials such as EPS, etc., whose raw materials come from petroleum. Under the environment of a sharp increase in the price of petroleum products, EPS / XPS ...

AI Technical Summary

Problems solved by technology

However, it also causes the disadvantages of moisture absorption and water seepage. On the one hand, the plant fibers will be depolymerized by microorganisms in a water-soaked environment, which will reduce the tensile strength of the fibers; A large number of monosaccharides, oligosaccharides, lignin, etc. are proposed to cause serious retardation of cement. Therefore, it is necessary to modify the existing plant fibers to waterproof and improve the structure of the board wall so that the bone is continuous when the finished product is finished. The discontinuous structure of most of the pores ensures the solidity, waterproof and air permeability of the wall