Structural adhesive for building of bridge with precast segmental matching method

A matching method and structural adhesive technology, applied in the direction of adhesives, epoxy resin adhesives, adhesive types, etc., can solve the problems of operating time, early strength and color stability that cannot meet the process requirements at the same time, achieve color stability, early High strength, low heat release effect

Inactive Publication Date: 2013-12-25
WUHAN JIANQIAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the epoxy resin building structural adhesives commonly used in China are generally formulated with ordinary bisphenol A epoxy resin, polyamide, phenolic modified amine, etc., which cannot meet the requirements of operating time, early strength and color stability at the same time. Process requirements

Method used

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  • Structural adhesive for building of bridge with precast segmental matching method
  • Structural adhesive for building of bridge with precast segmental matching method
  • Structural adhesive for building of bridge with precast segmental matching method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Table 1 shows the preparation ratio of structural glue used in the construction of the bridge by the prefabricated segment matching method in this embodiment:

[0027]

[0028] Table 1

[0029] Wherein, the mass percentage concentration of the 2-ethyl-4-methylimidazole-ethylene glycol solution that adopts is 60%, and the thioglycolic acid is selected from the technical grade thioglycolic acid that the purity is more than 98%, and the preparation method is as follows:

[0030] (1) Mix 100g of bisphenol A epoxy resin with an epoxy value of 0.51, 35g of novolak epoxy resin with an epoxy value of 0.55, 11g of trimethylol propylene glycidyl ether, 1.5g of silicone defoamer, 2.3g of KH-561 Add coupling agent and 6g fumed silica into the reaction kettle and stir evenly, then add 200g silicon powder, stir evenly to obtain component A;

[0031] (2) Add 100g of m-xylylenediamine, 18g of amidoamine, 3g of 2-ethyl-4-methylimidazole-ethylene glycol solution, 5g of mercaptoacetic...

Embodiment 2

[0034] Table 2 shows the proportion of structural adhesives used in the construction of bridges by the prefabricated segment matching method in this embodiment:

[0035]

[0036] Table 2

[0037] Wherein, the mass percentage concentration of the 2-ethyl-4-methylimidazole-ethylene glycol solution that adopts is 60%, and the thioglycolic acid is selected from the technical grade thioglycolic acid that the purity is more than 98%, and the preparation method is as follows:

[0038] (1) Mix 100g of bisphenol A epoxy resin with an epoxy value of 0.48, 45g of novolac epoxy resin with an epoxy value of 0.58, 10g of ethylene glycol diglycidyl ether, 1g of silicone defoamer, and 2g of KH-570 coupling agent Add 5g of fumed silica into the reaction kettle and stir evenly, then add 245g of barite powder, stir evenly to obtain component A;

[0039] (2) Add 100g of isophorone diamine, 20g of amidoamine, 2g of 2-ethyl-4-methylimidazole-ethylene glycol solution, 4g of mercaptoacetic acid, ...

Embodiment 3

[0042] Table 3 shows the proportion of structural adhesives used in the construction of bridges by the prefabricated segment matching method in this embodiment:

[0043]

[0044] table 3

[0045] Wherein, the mass percentage concentration of the 2-ethyl-4-methylimidazole-ethylene glycol solution that adopts is 60%, and the thioglycolic acid is selected from the technical grade thioglycolic acid that the purity is more than 98%, and the preparation method is as follows:

[0046] (1) Mix 100g of bisphenol A epoxy resin with an epoxy value of 0.51, 38g of novolac epoxy resin with an epoxy value of 0.60, 9g of polypropylene glycol diglycidyl ether, 2g of silicone defoamer, 3g of KH-560 coupling agent and Add 5g of fumed silica into the reaction kettle and stir evenly, then add 245g of silicon powder, stir evenly to obtain component A;

[0047] (2) Add 100g of cyclohexanedimethylamine, 15g of amidoamine, 4g of 2-ethyl-4-methylimidazole-ethylene glycol solution, 3g of mercaptoac...

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Abstract

The invention relates to a structural adhesive for building of a bridge with a precast segmental matching method. Novolac epoxy resin and bisphenol A epoxy resin are matched via a certain proportion to form an epoxy resin system, an alicyclic amine hardener, amido amine, a 2-ethyl-4-methyl imidazole recoiled glycol solution and mercaptoacetic acid are adopted as accelerants to prepare a curing system, and the structural adhesive which is prepared from the epoxy resin system and the curing system according to the weight ratio of 3:1 has the characteristics that the low heat release and high early strength are realized, and the operable time is not less than 40 min, and meanwhile, in the use process of the structural adhesive, the colour and lustre are stable, and the technological requirements for matching construction of the bridge are met.

Description

technical field [0001] The invention relates to a structural glue used in construction, in particular to a structural glue used for constructing bridges by a prefabricated segment matching method. Background technique [0002] At present, domestic bridge construction is developing in the direction of prefabrication, factoryization and large-scale. The construction of bridges using the prefabricated segment matching method is a construction method that is vigorously promoted in bridge construction at present. This construction method has the advantages of fast construction speed, small construction area, small shrinkage and creep of box girder concrete, and small change in beam body alignment after completion. advantage. [0003] When adjacent segments are matched for construction, it is necessary to apply epoxy resin structural glue on the surface of the box girder. Applying structural glue is mainly used for sealing and anti-seepage between prefabricated box girders, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J163/04C09J11/04C09J11/06
Inventor 朱本玮
Owner WUHAN JIANQIAO NEW MATERIAL TECH CO LTD
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