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Bridge expansion joint protective pouring system

A technology of expansion joints and systems, applied in the direction of non-polymer adhesive additives, adhesive types, adhesives, etc., can solve the problems of reduced deformation capacity of bridge expansion joints, closed traffic for a long time, reduced traffic efficiency, etc., to achieve shortening Time to open traffic, excellent elasticity, and short surface-drying time

Pending Publication Date: 2021-11-16
CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: due to the accumulation of sand, gravel and soil, the deformation capacity of bridge expansion joints will be greatly reduced. Regular manual cleaning of joints not only consumes a lot of manpower, material resources, time and energy, but also needs to close traffic for a long time. reduce traffic efficiency

Method used

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  • Bridge expansion joint protective pouring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Step 1, the preparation of polyurethane prepolymer

[0056] 10 parts by mass of polyethylene glycol (Mn=2000) and 10 parts by mass of polyether polyol (Mn=3000) were heated in vacuum to remove water, then added to the reaction kettle, and 5 parts by mass of iso Phorone diisocyanate, 0.5 parts by mass of dibutyltin dilaurate, and 0.5 parts by mass of ethanolamine were reacted at 60°C for 1 hour to obtain a polyurethane prepolymer;

[0057] Step 2, the preparation of A component

[0058] Add 5 parts by mass of dibutyl phthalate, 1 part by mass of BYK070, 7 parts by mass of talcum powder and calcium carbonate powder into a vacuum reactor to remove water, and then add 1 part by mass of Dibutyltin dilaurate, 0.5 parts by mass of trimethyl orthoformate, and 30 parts by mass of polyurethane prepolymer prepared in step 1 are mixed in a vacuum environment, sealed and stored to obtain component A;

[0059] Step 3, preparation of component B

[0060] Mix 10 parts by mass of bis...

Embodiment 2

[0065] Step 1, the preparation of polyurethane prepolymer

[0066] 50 parts by mass of polyethylene glycol (Mn=2000) and 40 parts by mass of polyether polyol (Mn=3000) were heated in a vacuum to remove water, then added to the reactor, and 20 parts by mass were added under nitrogen protection. The equivalent blend of toluene diisocyanate and diphenylmethane diisocyanate, 1 mass part of diethanolamine, and 1 mass part of stannous octoate were reacted at 70°C for 2 hours to obtain a polyurethane prepolymer;

[0067] Step 2, the preparation of A component

[0068] 10 parts by mass of dioctyl phthalate, an equal blend of ethyl acetate, 5 parts by mass of BYK024 and an equal amount of HX-2085, 20 parts by mass of kaolin and silica powder The blend is added in a vacuum reactor to dewater, then add 5 mass parts of dibutyltin dilaurate, 2 mass parts of trimethyl orthoformate, the polyurethane prepolymer of 60 mass parts that step 1 makes, in a vacuum Mix under ambient conditions, se...

Embodiment 3

[0075] Step 1, the preparation of polyurethane prepolymer

[0076] 45 parts by mass of polyethylene glycol (Mn=4000) and 25 parts by mass of polyether polyol (Mn=5000) were heated in a vacuum to remove water, then added to the reactor, and 15 parts by mass were added under nitrogen protection. 1,6-hexamethylene diisocyanate, 1 mass part of dibutyltin dilaurate, and 0.6 mass part of ethanolamine were reacted at 80°C for 1 hour to obtain a polyurethane prepolymer;

[0077] Step 2, the preparation of A component

[0078] Add 8 parts by mass of ethyl acetate, butyl acetate and an equal blend of butyl acetate, 3 parts by mass of BYK024, 7 parts by mass of talcum powder, and 6 parts by mass of diatomaceous earth into a vacuum reactor for removal. Water, then add 3 mass parts of dibutyltin dilaurate, 1 mass part of trimethyl orthoformate, the polyurethane prepolymer of 45 mass parts that step 1 makes, mix under vacuum environment, seal and preserve promptly to get A components;

...

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Abstract

The invention relates to a bridge expansion joint protective pouring system which is a mixture of a component A, a component B and a component C. The component A comprises, by mass, 30-60 parts of a polyurethane prepolymer, 5-10 parts of a plasticizer, 1-5 parts of a catalyst, 1-5 parts of a defoaming agent, 0.5-2 parts of a water removal agent and 7-20 parts of filler. The component B comprises 10-20 parts by mass of epoxy resin, 1-8 parts by mass of a diluent and 1-3 parts by mass of a thixotropic agent; the component C comprises 1-5 parts by mass of a high-activity curing agent; 1-5 parts by mass of a medium-activity curing agent; and 0.5-2 parts by mass of a coupling agent. After the component B and the component C are mixed, epoxy groups can react with amino groups for curing; the epoxy resin and the metal have excellent bonding performance, so that the component B and the component C can be firmly bonded with a steel structure of the expansion joint after being cured.

Description

technical field [0001] The invention relates to the technical field of bridge expansion joint protection, in particular to a bridge expansion joint protection pouring system. Background technique [0002] Concrete structures will shrink and expand due to temperature changes. Therefore, in the design of bridge structures, expansion joints need to be set at intervals. At present, bridge expansion joints are usually composed of steel structures and elastic water-stop rubber strips, which can not only ensure airtightness, but also be durable and not easily damaged. However, during long-term service, rainwater and wheels will bring a large amount of soil and sand into the expansion joints, which will accumulate over time and form hard fillers, greatly reducing the deformation capacity of the expansion joints. For this reason, the road surface management and maintenance department needs to regularly clean up the expansion joints, which not only consumes a lot of manpower, materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06
CPCC09J175/08C09J11/04C09J11/06C08K2003/265C08K5/12C08K3/34C08K3/26C08K3/36C08K5/544
Inventor 刘汉超滕新华张菁燕张凯华
Owner CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD
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