Modified self-insulating composite external wall material

Abstract

The invention discloses a modified self-insulating composite external wall material, and belongs to a gypsum building material. The material comprises the following components in percentage by weight: 75 to 84 percent of gel material, 0.2 to 1.5 percent of heat insulating material, 3 to 6 percent of modifying agent and 12 to 18 percent of water; the gel material consists of gypsum, fly ash, cement and lime, wherein the gypsum and the fly ash are in the majority; the heat insulating material is one or more of polyphenyl granules, rice hulls, straws, saw dust and expanded perlite; and the modifying agent is a common salt compound or a mixture of the common salt compound, aluminum powder and polyvinyl chloride (PVC) latex powder. The external wall material for manufacturing external wall building blocks or external wallboards by optimized proportion and modification treatment remarkably improves the comprehensive performance of water prevention, heat insulation, shock resistance and pressure resistance; and production and construction are convenient, the raw materials are easily obtained, industrial and agricultural byproducts are fully utilized, and environmentally-friendly and energy-saving requirements are met.

Description

technical field [0001] The invention relates to a gypsum building material, in particular to a modified self-insulating composite outer wall material used for making frame structures and outer wall blocks of shear wall buildings. Background technique [0002] Wall material reform is an important measure to protect land resources, save energy, comprehensively utilize resources, and improve the environment, and is an important part of the sustainable development strategy. Building energy conservation is an important field of my country's energy conservation work. Under the strong promotion of policies, the market for building exterior wall insulation and energy-saving materials has developed rapidly. Over the years, all kinds of new wall materials for building exterior walls have emerged in an endless stream, such as organic materials, inorganic materials, composite materials, chemical synthesis materials and so on. While each has advantages, there are many major disadvantage...

AI Technical Summary

Problems solved by technology

[0004] 1. The water resistance of gypsum is extremely poor, and it will powder when it meets water. It cannot be used in places with continuous humidity such as external walls, kitchens, bathrooms, and toilets.

[0005] 2. The texture of gypsum is brittle and fragile, with low flexural and pull-out strength. It is prone to damage and missing edges and corners during molding, transportation and construction, which limits the development of industrialization

[0006] 3. The gypsum building materials cannot be evenly blended with lightweight thermal insulation materials, which affects the thermal insulation effect; the formed wall materials have hot and cold channels, and the strength is not uniform

[0007] 4. Gypsum building materials cannot be mixed with fly ash and cement components in batches. After batch addition, the initial setting time is greatly prolonged, the production cycle is long, and factory production is difficult to achieve; the second is the early strength of fly ash. No, when the curing temperature is low after forming, it is not good for strength growth, and the block will appear "powdering" phenomenon

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