Thermal-insulation material for prefabricated building exterior walls

Abstract

The invention discloses a thermal-insulation material for prefabricated building exterior walls. The thermal-insulation material is prepared from 100 parts by mass of a composite material and 120-140 parts of a curing agent through reacting and foaming, wherein the composite material is prepared from the following components in parts by mass: 85 to 100 parts of ordinary Portland cement, 55 to 62 parts of slag Portland cement, 6 to 9 parts of fly ash, 14 to 18 parts of expanded perlite, 16 to 24 parts of polypropylene fiber, 0.8 to1.5 parts of ash calcium powder, 40 to 55 parts of melamine formaldehyde resin, 48 to 54 parts of a polyurethane oligomer, 4 to 6 parts of polyacrylamide, 38 to 42 parts of sodium bicarbonate, 15 to 22 parts of a phosphorus-containing flame retardant and 1.1 to 1.4 parts of N, N-dimethylbenzylamine, wherein the curing agent is toluene diisocyanate. The thermal-insulation material has the advantages of being low in thermal conductivity, high in cracking resistance, deformation-free and cracking-free and can be applied to exterior wall external insulation of building energy-saving projects.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a thermal insulation material for an assembled building exterior wall. Background technique [0002] The traditional mortar block wall is labor-intensive and materials-intensive. In addition, it becomes construction waste after demolition, which wastes materials, pollutes the environment and occupies cultivated land. Prefabricated buildings refer to buildings assembled on site with prefabricated components. The advantage of this kind of building is that the construction speed is fast, it is less restricted by climatic conditions, it saves labor and can improve the construction quality. The prefabricated building not only simplifies the relatively complex construction work of traditional mortar-bonded blocks, but also improves work efficiency. More importantly, the prefabricated building can be reused many times after disassembly. [0003] Concrete usually uses cement...

AI Technical Summary

Problems solved by technology

At present, the lightweight thermal insulation materials used in external thermal insulation projects are mainly organic combustible materials represented by polystyrene foam, which have serious fire hazards.

In recent years, large-scale building fires caused by the use of such organic flammable thermal insulation materials are not uncommon, which have caused hundreds of millions of major economic losses and most personal casualties