A method for preparing a prefabricated concrete exterior wall panel integrated with structural insulation and decoration

Abstract

The invention discloses a preparation method of a structural heat insulation and decoration integrated prefabricated concrete external wall plate. The preparation method comprises the steps: wholly wrapping an organic heat insulation plate by steel plate boxes, and then, connecting the plurality of steel plate boxes into a heat insulation layer with an integrated planar structure in a welding way, wherein all the steel plate boxes are always kept level and are located in the same plane, and a splicing seam between every two adjacent steel plate boxes can be controlled to be very small, so that the cold and hot bridge phenomena are seriously weakened; the organic heat insulation plate is wholly wrapped by the steel plate boxes to ensure that water in wet base concrete and water in other external environments cannot be permeated into the organic heat insulation plate again, so that the condition that the heat insulation property of the organic heat insulation plate is lowered due to humidity caused by water immersion can be avoided, and furthermore, the heat insulation property, service life and durability of the structural heat insulation and decoration integrated prefabricated concrete external wall plate are improved.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to a method for preparing a prefabricated concrete exterior wall panel integrated with structural insulation and decoration. Background technique [0002] Building energy conservation is the need to achieve sustainable development, and building fire protection is the need for social security. Both must be taken into account, and neither is possible without the other. At present, my country's energy-saving requirements for building exterior walls are 75% and above, and the fire protection requirements for building exterior walls are to meet Class A fire protection requirements. [0003] Prefabricated concrete exterior wall panels are used for the shear walls of prefabricated buildings. Most of the structures are inner leaf walls, insulation layers and outer leaf walls arranged sequentially from the inside to the outside. The insulation layer and the outer leaf walls p...

AI Technical Summary

Problems solved by technology

[0007] 1). The specific process above includes two times of concrete pouring and vibrating. The first time is for pouring and vibrating the outer leaf wall, and the latter is for pouring and vibrating the inner leaf wall. However, there is only one steam curing, that is, before the outer leaf wall The insulation board is paved before curing and forming, and then a layer of wet-base concrete is poured and vibrated on the top of the insulation board. The leaf wall concrete and the inner leaf wall concrete are both viscous slurry. In the process of smoothing and vibrating the inner leaf wall concrete with external force, the external force spreads downwards and it is easy to press the insulation board that was originally paved into a plane. High and low, crooked, resulting in a single insulation board is no longer flat, resulting in most of the insulation boards are no longer in the same plane, so that the integrity of the insulation layer is destroyed, the gap between adjacent insulation boards The joint gap is too large, and the hot and cold bridge phenomenon is very prominent, resulting in poor thermal insulation performance of the prefabricated concrete exterior wall panel integrated with thermal insulation and decoration of the structure;

[0008] 2). The thermal insulation performance of the existing popular organic thermal insulation boards is relatively good, but this thermal insulation performance refers to the thermal insulation performance of the organic thermal insulation board in the original dry state, but once the organic thermal insulation board encounters water and becomes damp, its thermal insulation performance will be greatly improved. Therefore, in the prior art, it is required that the water absorption rate of the organic insulation board should be as small as possible, and in the construction of the external wall insulation system, it is necessary to fill the joints in the facing layer with sealing waterproof glue to prevent external water It flows from the joints in the facing layer and finally penetrates into the insulation layer to make the insulation board wet and damp, reducing the insulation performance and durability of the insulation layer. However, in the above specific process, the concrete of the outer leaf wall and The concrete of the inner leaf wall is viscous slurry, and a large amount of water contained in the two will inevitably seep into the organic insulation board laid between the two, so that the organic insulation board will be soaked and become damp. Furthermore, during the steam curing process in the later stage, high-temperature water should continue to be added to the concrete of the outer leaf wall and the concrete of the inner leaf wall. Inevitably, the supplemented high-temperature water will continue to penetrate into the organic insulation board, thereby intensifying the organic insulation. The wet state of the board seriously reduces the thermal insulation performance of the organic thermal insulation board. Even if there is a drying and dehydration process in the later stage, the thermal insulation performance of the organic thermal insulation board soaked in water cannot be restored to the original dry state. Just like a piece of paper, after being soaked in water, even if it is air-dried, it will not return to its original appearance and quality

Images