Preparation and construction method of epoxy grouting material for track filling and secondary grouting

A technology of epoxy grouting and secondary grouting, which is applied in the direction of track, track maintenance, track laying, etc. It can solve the problems of poor product toughness, low strength, large expansion rate, etc., and achieve low non-expansion shrinkage rate and high bonding strength , the effect of dense pores and less

Active Publication Date: 2014-02-05
BEIJING ALLIED RONGDA CONSTR MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research and development of CAM (emulsified asphalt mortar) in Japan and Germany has been mature, and the research on CAM for slab ballastless track in my country started relatively late. CAM, but compared with Japan's CAM technology, there is still a big gap
In particular, there is a considerable gap in the air content, fluidity and durability (freeze resistance) of CAM
The CAM mortar material has low strength, poor durability, short service life, and cracking phenomenon in long-term use, which brings safety hazards to high-speed railway transportation.
In addition, during pouring of CA mortar construction, in order to make the cement hydration form the required silicate compound to have the final strength, it is necessary to add ...

Method used

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  • Preparation and construction method of epoxy grouting material for track filling and secondary grouting
  • Preparation and construction method of epoxy grouting material for track filling and secondary grouting
  • Preparation and construction method of epoxy grouting material for track filling and secondary grouting

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0065] The preparation method of the high-strength precision non-shrinkage epoxy grout of the present invention:

[0066] Preparation of component A: Accurately weigh the above-mentioned glycidyl ether reactive diluent, toughening agent, leveling agent, defoamer, antioxidant and silane coupling agent or titanate coupling agent at 15-60°C , placed in a stirred tank at 300 rpm for pre-mixing for 20 minutes. Then weigh the above-mentioned bisphenol A type epoxy resin and add it into the pre-mixed stirring tank, and keep the temperature constant for blending for 1 hour. Finally, the material is packaged according to specific gravity as component A.

[0067] Preparation of component B: It is prepared by reacting polyetheramine and 2,4,6-tris(dimethylaminomethyl)phenol at a ratio of 2:1 at 60-80°C and placed under stirring at 15-60°C Re-disperse in the kettle for 30min. Packing according to specific gravity discharge as B component.

[0068] Preparation of component C: Take sand...

test approach 1

[0072] Table 3 Test scheme 1 mass ratio

[0073]

[0074] Take the prepared A, B, and C three-component materials and mix them at a mass ratio of 80:24:400. According to the test standard in Table 3, the following performance tests are carried out, and the test results are shown in Table 7

[0075] ①. Test the flow value of the blend.

[0076] Carry out in accordance with GB / T50448-2008 regulations. Dimensions of conical circular die: height 60±0.5mm, inner diameter of upper mouth 70mm±0.5mm, inner diameter of lower mouth 100mm±0.5mm, outer diameter of lower mouth 120mm. Test plate: flat glass with an area larger than 300mm*300mm.

[0077] ②, linear shrinkage

[0078] The test is carried out in accordance with the regulations of HG / T2625-94, which is suitable for the linear shrinkage of the material from the gel state after mixing.

[0079] ③, flexural strength, compressive strength

[0080] The test of compressive strength and flexural strength shall be carried out a...

test approach 2

[0088] Table 4 Test scheme 2 mass ratio

[0089]

[0090] Take the A, B, and C three-component materials prepared in Test Scheme 2 and mix them at a mass ratio of 80:32:400. Test according to the corresponding method in Test 1, and the test results are shown in Table 7.

[0091] Experiment 3

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Abstract

The invention relates to preparation and a construction method of a grouting material (referred to as RE-GD) for track filling and secondary grouting. The RE-GD comprises three components, A, B and C. The component A is a modified epoxy resin mixing system, which comprises modified epoxy resin, an active diluent, a toughening agent, an antioxidant, a leveling agent, a defoaming agent and a coupling agent. The component B is a curing agent. The component C is a filler. The high-strength precise non-contraction epoxy resin grouting material for tracking provided by the invention has the advantages of high adhesion to a cement base and a steel base, high strength, good toughness, no expansion, extremely low contraction rate and small amount of dense porosity; excellent properties of polymer material enables the material with characteristics, unmatched by other materials, in corrosion resistance and weatherability performance, and can satisfy usage in different climate environment. The material provided by the invention has long cycle of usage and a general service life of up to 30 years, and can be used as a substitute or be applied to environment and position, which CA mortar or cement base grouting material can not be applied to.

Description

technical field [0001] The invention relates to a preparation and construction method of epoxy grouting material for track filling and secondary grouting. Background technique [0002] Railway container transportation is an important symbol of railway freight modernization. In recent years, the container transportation industry at railway ports has developed rapidly, and the transportation volume has increased significantly. However, problems such as backward facilities for reloading containers on railways and insufficient capacity have become increasingly prominent. The existing track system has seriously affected production and brought safety hazards to crane operations. [0003] In order to make the slab track have a certain degree of elasticity, reduce the construction error of the base, and fix the position of the track structure, it is usually necessary to fill the non-shrinkage buffer with excellent toughness and adhesion between the concrete base (or steel structure...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08K13/02C08K3/26C08K3/34C08K3/36C08G59/62E01B29/00
Inventor 朱硕霍利强
Owner BEIJING ALLIED RONGDA CONSTR MATERIAL
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