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Epoxy-structure adhesive for prefabrication and splicing of bridge segment

An adhesive and epoxy technology, applied in the direction of adhesives, novolac epoxy resin adhesives, epoxy resin adhesives, etc., to achieve the effects of fast strength growth, long service life, and long operating time

Active Publication Date: 2019-09-06
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There are very few special structural adhesives for this construction method at home and abroad, because it is difficult to meet the above requirements at the same time, and the rapid development of domestic railways urgently needs matching adhesives for segmental prefabricated bridge splicing

Method used

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  • Epoxy-structure adhesive for prefabrication and splicing of bridge segment
  • Epoxy-structure adhesive for prefabrication and splicing of bridge segment
  • Epoxy-structure adhesive for prefabrication and splicing of bridge segment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A component

[0057] Bisphenol A epoxy resin: 30 parts, hydrogenated bisphenol A epoxy resin: 25 parts, novolac epoxy resin: 15 parts, thinner: 16 parts, toughening agent: 10 parts, fumed silica: 7 parts, Silica powder (400 mesh): 95 parts, short fiber: 4 parts, silane coupling agent: 1 part, ultraviolet absorber: 0.12 parts, defoamer: 0.06 parts.

[0058] B component

[0059] Phenolic modified polyamidoamine: 20 parts, self-catalyzed modified alicyclic amine: 20 parts, cardanol aminal: 24 parts, highly active silane coupling agent: 4 parts.

[0060] The highly active silane coupling agent is ND-42 (anilinomethyltriethoxysilane).

[0061] A component: B component = 3:1 (weight ratio), the use temperature is 5°C~20°C.

Embodiment 2

[0063] A component

[0064] Bisphenol A epoxy resin: 35 parts, hydrogenated bisphenol A epoxy resin: 20 parts, novolac epoxy resin: 15 parts, thinner: 10 parts, toughening agent: 15 parts, fumed silica: 7 parts, Silica powder (400 mesh): 100 parts, short fiber: 5 parts, silane coupling agent: 1 part, ultraviolet absorber: 0.12 parts, defoamer: 0.06 parts.

[0065] B component

[0066] Phenolic modified polyamide-amine: 20 parts, self-catalyzed modified alicyclic amine: 12 parts, cardanol aminal: 32 parts, highly active silane coupling agent: 4 parts.

[0067] The highly active silane coupling agent is Y-9669 (N-phenyl-Y-aminopropyltrimethoxysilane).

[0068] A component: B component = 3:1 (weight ratio), and the use temperature is 15°C to 30°C.

Embodiment 3

[0070] A component

[0071] Bisphenol A epoxy resin: 40 parts, hydrogenated bisphenol A epoxy resin: 15 parts, novolac epoxy resin: 15 parts, thinner: 10 parts, toughening agent: 15 parts, fumed silica: 6 parts, Silica powder (400 mesh): 106 parts, short fiber: 5 parts, silane coupling agent: 1

[0072] parts, UV absorber: 0.12 parts, defoamer: 0.06 parts.

[0073] B component

[0074] Phenolic modified polyamide-amine: 28 parts, self-catalyzed modified alicyclic amine: 4 parts, cardanol aminal: 32 parts, highly active silane coupling agent: 4 parts.

[0075] The highly active silane coupling agent is Y-9669 (N-phenyl-Y-aminopropyltrimethoxysilane).

[0076] A component: B component = 3:1 (weight ratio), the use temperature is 25°C ~ 40°C.

[0077] Performance tests were performed on the above three formula samples, including operating time, compressive strength, and damp heat aging resistance. The working time refers to the time when the viscosity of the adhesive increas...

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Abstract

The invention discloses an epoxy-structure adhesive for prefabrication and splicing of a bridge segment. The epoxy-structure adhesive is prepared by mixing a component A and a component B, and duringconstruction, the components A and B are mixed according to the mixing ratio of 3:1, wherein the component A comprises bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, novolac epoxy resin, a diluent, a flexibilizer, fumed silicon dioxide, silica powder, short fibers, a silane coupling agent, an ultraviolet light absorber and a defoaming agent, and the component B comprises phenolic-aldehyde-modified polyamide-amine, autocatalytic modified alicyclic amine, cardanol polyacetals amine and a high-activity silane coupling agent. According to the epoxy-structure adhesive, through compounding between the bisphenol A epoxy resin, the hydrogenated bisphenol A epoxy resin and the novolac epoxy resin and the diluent, the flexibilizer and the like, and addition of the short fibers, a filler and the like, the epoxy-structure adhesive has the advantages that the operable time is long, the strength increase is quick, and the adhesive can adapt to different operation environment temperatures, and has good resistance to damp-heat aging and long service life; the epoxy-structure adhesive is more suitable for being applied to prefabrication and splicing construction of the bridge segment.

Description

technical field [0001] The invention belongs to the field of bridge structure construction, and in particular relates to an epoxy structural adhesive for prefabricated splicing of bridge segments. Background technique [0002] Segmental prefabrication construction technology is a bridge construction method that has developed rapidly in recent decades. Its principle is to divide bridge components into several segments along a certain direction or multiple directions, and transport them to the bridge site after the segmental prefabrication is completed. , and then install it in place, through the use of prestressed steel tendons or prestressed steel bars or ordinary steel bars or steel members, so that each segment is connected as a whole and meets the design requirements. Compared with the traditional in-situ cast-in-place, hanging basket cantilever pouring and other bridge site pouring concrete construction technologies, the bridge prefabricated segmental assembly technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J163/04C09J11/04C09J11/06
CPCC08L2201/08C08L2205/025C08L2205/03C09J11/04C09J11/06C09J163/00C08L63/00C08L63/04C08K3/36C08K5/54
Inventor 王祯苏伟孙大斌周岳武
Owner CHINA RAILWAY DESIGN GRP CO LTD
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