Hook-shaped reinforcing bar core continuous fiber composite connection piece for prefabricated sandwich heat insulation wall body

Abstract

The invention discloses a hook-shaped reinforcing bar core continuous fiber composite connection piece for a prefabricated sandwich heat insulation wall body. The connection piece consists of a hook-shaped reinforcing bar core continuous fiber composite bar and a bushing, wherein a main body of the hook-shaped reinforcing bar core continuous fiber composite bar is a novel composite material which takes a reinforcing bar as a ductile inner core wrapped by a rigid continuous fiber and is prepared by wrapping the surface of the reinforcing bar with a longitudinal continuous fiber through an integrated pultrusion process, then winding the outer surface of the longitudinal continuous fiber with a transverse fiber to form a wave-form continuous fiber covering layer, bending one end of the reinforcing bar into a hook after the fibers are cooled and heating and forming the reinforcing bar; the bushing is molded by a plastic injection molding process. The connection piece disclosed by the invention is simple in structure, low in manufacturing cost, low in heat conduction coefficient, high in durability and high in safety stock, and is suitable for connection of concrete plates inside and outside the prefabricated sandwich heat insulation wall body.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a hook-shaped steel bar core continuous fiber composite connector for prefabricated sandwich thermal insulation walls, which is used for making prefabricated sandwich thermal insulation concrete wall panels. Background technique [0002] Under the background of my country's vigorous promotion of prefabricated buildings and the promotion of green buildings and green construction, building products must meet the requirements of "four sections and one environmental protection". Energy-saving walls are the main means to achieve building energy conservation and have good development prospects. Insulated walls have been widely promoted as energy-saving walls in the field of construction. At present, there are three types of thermal insulation walls commonly used in engineering, including internal thermal insulation, external thermal insulation and sandwich ...

AI Technical Summary

Problems solved by technology

At present, the materials of connectors used in prefabricated precast concrete sandwich insulation walls at home and abroad mainly include metal materials and fiber reinforced composite plastics (FRP), and there are many material problems: 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, 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 significantly; fiber reinforced composite plastic (FRP) Although the connector has the advantages of high tensile strength, strong corrosion resistance, small thermal conductivity, and low price, its shear strength is low and it is a brittle material. Once it is damaged, there is no warning, no warning, and the safety reserve is not high.

Moreover, the structural forms of existing connectors mainly include rod-shaped and lattice-shaped, and generally speaking, there are disadvantages such as complicated installation process, poor work performance, large amount of materials, and high price.

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

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