A kind of caulking structure with modified isocyanate buffer layer and its construction technology

Abstract

The invention relates to a joint-filling structure with a modified isocyanate buffer layer and its construction technology, belonging to the technical field of polymer materials. The utility model comprises an undercoat layer applied on the upper edge and the side of the concrete joint body, a buffer layer is arranged on the surface of the undercoat layer located on the side surface of the concrete joint body, and elastic bodies are filled between the buffer layers. Including the following steps: 1), test the moisture content of the concrete joint body ≤ 35%; 2), polish the upper edge and side of the concrete joint body until smooth and clean; 3), apply the primer evenly on the concrete joint body The upper edge and the side; 4), apply the buffer layer on the side primer by scraping; 5), pour the elastomer between the buffer layers. The invention can not only effectively solve the problem of primer and elastic body falling off, but also make the bonding strength of the concrete joint filling structure ≥ 2.5 MPa, and the fracture occurs inside the elastic body, protecting concrete-primer, primer-buffer Layer, buffer layer-elastomer interfaces are intact.

Description

technical field [0001] The invention relates to a joint-filling structure with a modified isocyanate buffer layer and its construction technology, belonging to the technical field of polymer materials. Background technique [0002] As an important connecting part between bridge girder ends, bridge joint filling plays an important role in the shock absorption and waterproof performance of bridge ends. In the traditional sense of caulking, two shaped steels are pre-embedded in the cement at both ends of the gap, and then the rubber sealing strip is inserted into the shaped steel, and the shaped steel and the sealing strip are closely connected to prevent the gap from leaking. The connection type between rubber and section steel is card groove connection. Due to reasons such as improper installation and aging of the sealing strip, the sealing strip will fall off, be damaged or even cracked to varying degrees, and lose the functions of shock absorption, load bearing and drainage...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the deficiencies in the prior art, and provide a method that can effectively solve the problem of shedding caused by the large difference in hardness between the primer and the elastomer and the excessive moisture content of the concrete during construction, and It can make the bonding strength of the concrete seam filling structure ≥ 2.5MPa, and the fracture occurs inside the elastomer, which can protect the interface bonding surfaces of concrete-primer, primer-buffer layer, buffer layer-elastomer intact. The caulking structure and construction technology of isocyanate buffer layer

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