Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof

A technology of slab ballastless track and grouting materials, which is applied in the direction of track, track maintenance, track laying, etc. It can solve the problems of long gel time, poor curing, and inability to bond graded gravel into a whole.

Active Publication Date: 2015-03-25
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the cement is solidified into a hydration reaction, it takes a long time and it is difficult to meet the requirements of opening to traffic after 4 hours at the skylight point; and the high-strength resin grouting method has the following disadvantages: (1) Commercially available grouting materials are mostly used in tunnels and bridges The compressive strength and elastic modulus of the materials are low for waterproof plugging or crack repair in dyke and dam projects; (2) The commercially available grouting materials have poor compatibility with graded crushed stone and concrete bonding, that is, the bonding strength is low, and moisture cannot The graded gravel is bonded into a whole, and the reinforcing effect is small; the expansion pressure of the material has not been tested, the grouting vol

Method used

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  • Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof
  • Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof
  • Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The preparation process of the plate type ballastless track grouting material of the present invention is as follows (the consumption of each component is shown in Table 1):

[0063] (1) Polyol polyether YD1020 (hydroxyl value 112mgKOH / g), polyether YD4450 (hydroxyl value 350mgKOH / g), crosslinking agent polyether YD303 (hydroxyl value 480mgKOH / g), chain extender 1,4-butyl Diol, plasticizer dibutyl phthalate, polyurethane foam stabilizer AK8805, antioxidant 1010 and silane coupling agent KH560 are put into the reaction kettle in turn, stirred at a speed of 200rpm and heated to 110°C, and then reacted Vacuumize and dehydrate the kettle with a vacuum degree of 0.09MPa, keep it for 3 hours, stop heating, cool down to 40°C, add water, curing accelerator stannous octoate, pentamethyldiethylenetriamine, diluent S1000 solvent naphtha, continue to stir at a speed of 200rpm for 0.5 hour, and then pack and store to obtain the A component.

[0064](2) Stir the isocyanate PAPI (pur...

Embodiment 2

[0073] The preparation process of the slab ballastless track grouting material of the present invention is as in Example 1 (see Table 2 for the dosage of each component).

[0074] The performance of the grouting material of the present invention: A and B components start to react 30s after mixing, the gel foams and solidifies after 90s, the viscosity is 350mPa·s, the expansion pressure is 11.8kPa, the compressive strength is 32MPa, and the elastic modulus It is 153MPa, and the bonding strength is 3.2MPa.

[0075] Table 2: The dosage of each component

[0076]

[0077]

Embodiment 3

[0079] The preparation process of the slab ballastless track grouting material of the present invention is as in Example 1 (see Table 3 for the dosage of each component).

[0080] The performance of the grouting material of the present invention: A and B components start to react 20s after mixing, the gel foams and solidifies after 60s, the viscosity is 350mPa·s, the expansion pressure is 10.4kPa, the compressive strength is 36MPa, and the elastic modulus It is 161MPa, and the bonding strength is 3.8MPa.

[0081] Table 3: The amount of each component

[0082]

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Abstract

The invention provides an injecting paste material for a plate-type ballastless track. The injecting paste material includes a component A and a component B, wherein the component A includes the following materials in parts by weight: 40-80 parts of polyhydric alcohols, 5-10 parts of cross-linking agents, 1-50 parts of plasticizers, 4-20 parts of chain extenders, 1-50 parts of diluents, 0.1-10 parts of curing accelerators, 1-5 parts of antioxygen, 1-5 parts of coupling agents, 0.04-0.2 part of water and 0.5-5 parts of foam stabilizer; the component B includes the following materials in parts by weight: 50-150 parts of isocyanate or isocyanate prepolymers and 1-50 parts of diluents; when temperature changes, a component C or D can be added into the mixture of the components A and B to meet the construction requirements at different temperatures, the solidification strength of the injecting paste material is not influenced by humid environment, and the mechanical properties of the material are excellent.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a grouting material which can be used for regulating slab-type ballastless track turning and mud-flowing, as well as a preparation method and a use method thereof. Background technique [0002] my country is carrying out the construction of large-scale passenger dedicated lines and high-speed railways. As my country's high-speed railways are about to gradually form the framework of "four vertical and four horizontal" passenger dedicated lines, the fast passenger transport systems in the Bohai Rim, Yangtze River Delta, and Pearl River Delta regions will be built. Ballastless tracks will become The main choices of various passenger dedicated lines and high-speed rail. Compared with the ballasted track, the main feature of the ballastless track is that it cancels the ballast and replaces it with a concrete base. At the same time, the structural form of the sleeper (slab)...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/62C08G18/32C08G18/10C08G18/12C08J9/08E01B29/00
CPCC08G18/10C08G18/4804C08G18/6674C08G18/6677C08G18/6688C08G18/7664C08G2110/0083E01B1/002E01B2204/09E01B2204/11
Inventor 王鑫吴绍利郭超陆方斌李艳伟合阔
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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