A prefabricated concrete sandwich insulation exterior wall panel connected by W-shaped steel core and glass fiber bars

Abstract

The invention discloses a precast concrete sandwich insulation external wall panel connected by a W-shaped steel bar core glass fiber reinforced polymer, wherein the internal and external wall panels are formed by pouring common concrete or light concrete, a middle insulation layer adopts a non-inflammable or flame-resisting insulation board, and the three structures are connected integrally by a W-shaped steel bar core glass fiber reinforced polymer connecting piece. The connecting piece adopts a middle steel bar core outside which continuous glass fibers are wrapped, and fibers are wound on the surface to form cambered uneven screw threads. The connecting piece is of a W-shaped geometric shape, the space among the turning points of the connecting piece is matched with the space among the pitch points of the reinforcing mesh of the internal and external concrete wall panels, and when installed, the connecting piece penetrates through the middle insulation layer and is placed between the reinforcing meshes of the internal and external wall panels, and then is banded and fixed with the adjacent reinforcing meshes to preform the precast concrete sandwich insulation external wall panel with the W-shaped steel bar core glass fiber reinforced polymer as the connecting piece. By adopting the novel connecting piece, the technical problem of connection reliability of the precast concrete sandwich insulation external wall panel is solved.

Description

technical field [0001] The invention relates to a prefabricated concrete sandwich thermal insulation exterior wall panel with a W-shaped steel bar core and glass fiber bars as connectors, belonging to the technical field of prefabricated concrete construction engineering applications. Background technique [0002] The prefabricated prefabricated concrete sandwich thermal insulation exterior wall panel is an important prefabricated component integrating load-bearing, enclosure, heat preservation, waterproof, fire prevention and other functions. It has the advantages of simple production, quick installation, and the same life span of thermal insulation materials and structural components. The wide application of this component is conducive to meeting the requirements of "four sections and one environmental protection" of building products, and has a good development prospect under the background of the country's vigorous promotion of prefabricated buildings and the promotion of...

AI Technical Summary

Problems solved by technology

At present, the connectors used in the prefabricated prefabricated concrete sandwich insulation exterior wall panels that can be put into application at home and abroad are mainly metal and glass fiber, and there are many problems in both: although metal connectors such as steel bars have high strength and low price Low-level advantages, but the thermal conductivity of the material is large, and there is a "thermal bridge" effect, which affects the insulation effect of the wall, and the corrosion resistance of the steel bar is poor, which affects the life of the component. If stainless steel connectors are used, the cost will increase greatly; glass fiber reinforcement (GFRP) connection Although the parts have the advantages of high tensile strength, strong corrosion resistance, small thermal conductivity, and low price, their shear strength is low and they are brittle materials.

The existence of these problems has seriously hindered the large-scale application of prefabricated concrete sandwich insulation exterior wall panels in the market

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