A prefabricated building exterior wall

Abstract

The invention provides an exterior wall of a prefabricated building, which includes a thermal insulation board, a cover layer, an L-shaped embedded part and a cement layer. For all the panels except the inner panels, the L-shaped embedded parts include intersecting inner arms and outer arms. The length of the outer arms is greater than the thickness of the insulation board. On the wall, the end connecting the inner arm faces the cement layer inside the insulation board, the free end of the inner arm is inserted into the cement layer, and the insulation board, cover layer, L-shaped embedded part and cement are connected through the connecting piece pierced by the L-shaped embedded part. Layers are connected as one. The insulation board includes 100 parts of inorganic fiber and 1-13 parts of phenolic resin. The prefabricated building exterior wall in the present invention, through a reasonable structural layout, makes the structure of the prefabricated exterior wall simple, the exterior wall processing is convenient, combined with the new thermal insulation material, the fire prevention, isolation and mechanical properties are greatly improved.

Description

technical field [0001] The invention belongs to the field of new prefabricated buildings, in particular to an exterior wall of a prefabricated building. Background technique [0002] In recent years, with the development and promotion of prefabricated buildings in China, the external thermal insulation system of thermal insulation and decorative wall panels, as a wall thermal insulation technology, has a factory-like prefabricated anti-beating bonding process, which can ensure controllable quality and reduce construction costs. Difficulty, cycle saving, and beautiful "curtain wall" effect. [0003] However, the existing exterior walls of prefabricated buildings are still in their infancy. Generally, there are two types of sandwich structures combining cement and thermal insulation materials and two sandwich structures. There are some common problems: [0004] (1) When applying organic thermal insulation materials to the sandwich structure of prefabricated buildings, the con...

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Problems solved by technology

[0006] (3) When the sandwich structure changes in temperature and volume of the wall caused by climate change, the organic and inorganic materials do not match, and the thermal stress is large, which is likely to cause problems such as cracks, deformation, and damage to the main wall, and shorten the service life;

[0008] (5) When rock wool fire-proof and thermal insulation materials are combined with prefabricated buildings, the problem of serious performance degradation of rock wool itself after moisture absorption cannot be avoided, and rock wool and cement cannot be directly combined, and a porous cement backboard needs to be added as an intermediate layer. The structure is complex, which is likely to bring safety hazards;

[0009] (6) Regardless of whether it is a sandwich or two sandwiches, there is excessive use of adhesives so that the overall performance can only reach the B1 level of system composite fire performance;

[0010] (7) Regardless of whether it is a sandwich or two sandwiches, there is a problem that the cold bridge cannot be effectively blocked, and the thermal conductivity is greater than or equal to 0.04W / (m·K);

[0011] (8) Regardless of whether it is a sandwich or two sandwiches, the mechanical properties of the outer wall are poor, basically staying at the condition of impact resistance greater than or equal to 3J

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