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Quick-setting modified unsaturated resin for steel bridge deck maintenance, preparation method and mixture preparation method

An unsaturated, steel bridge deck technology, applied in the field of resin materials for road and bridge pavement, can solve the problems of high construction environment requirements, prone to rutting and secondary cracking at the repair site, so as to improve the overall mechanical properties, shorten the curing time, The effect of alleviating traffic pressure

Active Publication Date: 2021-04-23
JIANGSU CHANGLU ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's long-span bridges mostly adopt orthotropic steel box girder structures, which have the characteristics of low rigidity and high flexibility. The more cracks, potholes, ruts and other diseases, the treatment method for serious diseases is generally partial excavation and backfilling. The commonly used repair and maintenance materials for pits and other diseases mainly include cold-mix epoxy concrete, asphalt concrete and polyurethane concrete. and other types, but none of them can effectively meet the needs of use; for example, due to the large difference in modulus between the cold-mixed epoxy resin material and the original pavement, after a period of use, the repaired part is prone to secondary cracking, edge gnawing and other diseases, and the curing time is long , the curing is slow in winter, and there are problems such as the construction window period; asphalt materials are poor in high and low temperature resistance, and the repairs are prone to problems such as rutting and wave movement, and the durability is insufficient; because polyurethane materials are sensitive to water, the construction environment requires high requirements. Greatly reduces its patching effect

Method used

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  • Quick-setting modified unsaturated resin for steel bridge deck maintenance, preparation method and mixture preparation method
  • Quick-setting modified unsaturated resin for steel bridge deck maintenance, preparation method and mixture preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation process of modified unsaturated resin is as follows:

[0046] A1. Add 160 parts of unsaturated resin monomer 1,2-propylene glycol, 150 parts of phthalic anhydride, and 100 parts of maleic anhydride into the reaction kettle, and react at 200-230°C under the protection of inert gas to obtain polyester ;

[0047] A2. Add 20 parts of modified material PA6 to the polyester, and continue to react for 0.5~1h;

[0048] A3. Add the material prepared in A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mix at 60-80° C. to obtain a modified unsaturated resin.

[0049] The preparation method of the fast-curing modified unsaturated resin mixture for steel bridge deck maintenance is as follows:

[0050] S1. 40 parts of unsaturated resin (191), 60 parts of modified unsaturated resin, 10 parts of graphene powder, 10 parts of silsesquioxane, 10 parts of dopa (DOPA) and 1 part of accelerator (cycloalkane Cobalt acid) was added into...

Embodiment 2

[0054] The preparation process of modified unsaturated resin is as follows:

[0055] A1. Add 160 parts of unsaturated resin monomer 1,2-propylene glycol, 150 parts of phthalic anhydride, and 100 parts of maleic anhydride into the reaction kettle, and react at 200-230°C under the protection of inert gas to obtain polyester ;

[0056] A2. Add 20 parts of modified material PA6 to the polyester, and continue to react for 0.5~1h;

[0057] A3. Add the material prepared in A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mix at 60-80° C. to obtain a modified unsaturated resin.

[0058] The preparation method of the fast-curing modified unsaturated resin mixture for steel bridge deck maintenance is as follows:

[0059] S1. 80 parts of unsaturated resin (196), 20 parts of modified unsaturated resin, 2 parts of graphene powder, 5 parts of silsesquioxane, dopa (3PEG-DOPA) 3 ) and 2 parts of accelerator (DMA) were sequentially added into 10 parts ...

Embodiment 3

[0063] The preparation process of modified unsaturated resin is as follows:

[0064] A1. Add 160 parts of unsaturated resin monomer 1,2-propylene glycol, 150 parts of phthalic anhydride, and 100 parts of maleic anhydride into the reaction kettle, and react at 200-230°C under the protection of inert gas to obtain polyester ;

[0065] A2. Add 20 parts of modified material PA6 to the polyester, and continue to react for 0.5~1h;

[0066] A3. Add the material prepared in A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mix at 60-80° C. to obtain a modified unsaturated resin.

[0067] The preparation method of the fast-curing modified unsaturated resin mixture for steel bridge deck maintenance is as follows:

[0068] S1. 50 parts of unsaturated resin (323), 50 parts of modified unsaturated resin, 8 parts of graphene powder, 7 parts of silsesquioxane, dopa (5PEG-DOPA) 3 ) and 1.5 parts of accelerator (DMT) were sequentially added to 18 parts ...

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Abstract

The invention relates to a quick-setting modified unsaturated resin for steel bridge deck maintenance and a preparation method thereof. The quick-setting modified unsaturated resin for steel bridge deck maintenance provided by the invention comprises the following components by weight: 40-80 parts of unsaturated resin, 20-60 parts of a modified unsaturated resin, 10-25 parts of a diluent, 1-10 parts of graphene powder, 5-10 parts of silsesquioxane, 1-10 parts of dopa, 0.5-3 part of an accelerant and 0.5-6 part of a curing agent. The adopted modified unsaturated resin has the advantages of low viscosity, high strength, good toughness, good weather resistance, long service life, quick setting speed and the like, and the resin mixture realizes cold mixing and self-leveling, is free of rolling compaction, improves the construction efficiency, reduces the construction difficulty and cost, saves the construction energy consumption, is short in curing time and can be repaired at any time. The method plays an important role in promoting local economic development, relieving traffic and transportation pressure, saving repeated maintenance cost of the steel bridge deck and the like.

Description

technical field [0001] The invention relates to a resin material for road and bridge pavement, in particular to a fast-curing modified unsaturated resin material for steel bridge deck maintenance and a specific preparation method thereof. Background technique [0002] my country's long-span bridges mostly adopt orthotropic steel box girder structures, which have the characteristics of low rigidity and high flexibility. The more cracks, potholes, ruts and other diseases, the treatment method for serious diseases is generally partial excavation and backfilling. The commonly used repair and maintenance materials for pits and other diseases mainly include cold-mix epoxy concrete, asphalt concrete and polyurethane concrete. and other types, but none of them can effectively meet the needs of use; for example, due to the large difference in modulus between the cold-mixed epoxy resin material and the original pavement, after a period of use, the repaired part is prone to secondary cra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L77/02C08L83/04C08K3/04C08K5/17C08K5/14C08K13/02C04B26/32C04B111/72
Inventor 潘友强詹从明陈李峰李款莫剑臣吕浩
Owner JIANGSU CHANGLU ENERGY TECH DEV CO LTD
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