Composite water-proof layer for ballast track concrete bridge deck and construction method of composite water-proof layer

A technology of concrete and waterproof layer, applied in coatings, bridges, bridge parts, etc., can solve the problems of water channeling at the interface between the concrete bridge deck and the coil, cracking and powdering of the concrete protective layer, loss of protective effect, etc. Strong, save engineering costs, reduce the effect of water channeling

Active Publication Date: 2019-05-31
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In cold or freeze-thaw areas, the concrete protective layer is prone to frost heave and cracks and pulverizes, thus gradually losing its protective effect
In addition, the interface between the polymer modified asphalt waterproof membrane and the concrete bridge deck is weak. If there is local water seepage and the waterproof membrane is pierced, it is easy to cause water channeling between the concrete bridge deck and the membrane interface.
At the same time, during the high temperature season in summer, the oil in the waterproof membrane is easy to be squeezed out after softening, thereby contaminating the bridge deck

Method used

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  • Composite water-proof layer for ballast track concrete bridge deck and construction method of composite water-proof layer
  • Composite water-proof layer for ballast track concrete bridge deck and construction method of composite water-proof layer
  • Composite water-proof layer for ballast track concrete bridge deck and construction method of composite water-proof layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0076] Embodiment 1~6: a kind of polyurethane composition I

[0077] The polyurethane composition I raw material composition of embodiment 1~6 is as shown in table 1, is prepared by the following method:

[0078] (1) Prepare the raw materials of A1 component and B1 component according to the mass proportion;

[0079](2) Put the solvent and polyether polyol of the A1 component in a container, add the filler under stirring at 100-140 rpm, stir and disperse for 5-10 minutes, and then stir at 1000-1400 rpm After adding hydroxyethyl methacrylate, methyl methacrylate, isobutyl acrylate, N,N-dimethyl-p-toluidine and dibutyltin dilaurate, keep stirring and dispersing for 30-45 minutes at a constant speed, and then continue After adding fillers, anti-sedimentation additives, wetting and dispersing agents, defoamers, light stabilizers, and ultraviolet absorbers, continue to stir and disperse at high speed for 45-65 minutes, grind until the material fineness is below 50 μm, and dischar...

Embodiment 7～12

[0099] Embodiment 7~12 a kind of polyurethane composition II

[0100] The raw material composition of the polyurethane composition II of Examples 7-12 is as shown in Table 2, prepared by the following method:

[0101] (1) Prepare the raw materials of A2 component and B2 component according to the mass proportion;

[0102] (2) Put the solvent and polyether polyol of the A2 component in a container, add the filler under stirring at 100 to 140 rpm, stir and disperse for 5 to 10 minutes, and then stir at 1000 to 1400 rpm After adding hydroxyethyl methacrylate, methyl methacrylate, isobutyl acrylate, N,N-dimethyl-p-toluidine, dibutyltin dilaurate and graphene, keep stirring and dispersing for 30-45 minutes at a constant speed ,, and then continue to add fillers, anti-sedimentation additives, wetting and dispersing agents, defoamers, light stabilizers, ultraviolet absorbers, continue to stir and disperse at high speed for 45 to 65 minutes, grind until the material fineness reache...

Embodiment 13～18

[0113] Embodiments 13-18 Composite waterproof layer of railway ballasted track concrete bridge deck

[0114] The railway ballasted track concrete bridge deck composite waterproof layer described in embodiments 13 to 18 comprises from top to bottom: a modified polyurethane composite topcoat layer, a modified polyurethane composite primer layer and a sealing primer layer, wherein each layer Both are closely bonded to adjacent layers; construction is completed by the following methods:

[0115] (1) After the base surface of the concrete bridge deck is cleaned and dried, apply an epoxy sealing primer (produced by Langfang Santong Chemical Industry Co., Ltd.), and the consumption of the epoxy sealing primer is 0.2~0.4Kg / m 2 ;

[0116] (2) After coating the seal primer 24h, on the seal primer layer formed, coat the polyurethane composition I shown in Table 5 (prepared according to the method described in Example 1), the modified polyurethane compound formed The dry film thicknes...

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Abstract

The invention provides a composite water-proof layer for a railway ballast track concrete bridge deck and a construction method of the composite water-proof layer. The composite water-proof layer comprises a modified polyurethane compound finish paint layer, a modified polyurethane compound primer layer and a closed primer layer from top to bottom. The invention further provides raw material compositions of the modified polyurethane compound finish paint layer and the modified polyurethane compound primer layer and a preparation method of the modified polyurethane compound finish paint layer and the modified polyurethane compound primer layer. The composite water-proof layer is directly formed between the concrete bridge deck and a railway ballast by using a high-molecular material, a concrete protection layer does not need to be laid, the project cost of the concrete protection layer can be saved, the structure dead load can be reduced, and it is of an important significance in improving the durability of the railway concrete bridge. Moreover, the adhesive strength between the novel water-proof layer and the concrete bridge deck is high, and water breakthrough can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and waterproofing, and in particular relates to a composite waterproofing layer of a ballasted track concrete bridge deck and a construction method thereof. Background technique [0002] The deck waterproofing of railway bridges is a necessary structure to prolong the service life of bridges, reduce maintenance frequency and ensure traffic safety. At present, the ballasted railway concrete bridge deck is mainly waterproofed by high polymer modified asphalt waterproof membrane. However, the coiled material is relatively soft as a whole, and its resistance to ballast rolling and piercing is poor. During the construction, the concrete protection layer must be laid on the waterproof membrane, and then the road ballast should be laid. Due to the weight of concrete, for long-span bridges, the concrete cover increases the weight of the bridge structure, reduces the bearing capacity of the bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/08C09D151/08C08F283/00C08F220/14C08F220/18
Inventor 王涛祝和权杜存山南阳张喆
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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