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Cement-emulsified asphalt mortar for slab tracks in severe cold areas

A technology of cement emulsified asphalt and emulsified asphalt, which can be used in tracks, track maintenance, track laying, etc., and can solve problems such as cracking, delamination, and durability that does not reach the expected value.

Active Publication Date: 2015-06-24
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In December 2006, the Academy of Railway Sciences investigated and analyzed the use of CA mortar cushions for the ballastless track of the Shuanghe Bridge and the Gouhe Bridge on the Qinshen Passenger Dedicated Line, and found that there is still a certain gap between its technical performance and engineering application requirements, especially The reason is that the durability performance has not reached the expected value. In the test section that has not been in service for a long time, the mortar cushion has cracked, cracked and delaminated phenomena.
However, there is no relevant patent related to cement emulsified asphalt mortar for slab ballastless track in severe cold areas

Method used

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  • Cement-emulsified asphalt mortar for slab tracks in severe cold areas
  • Cement-emulsified asphalt mortar for slab tracks in severe cold areas
  • Cement-emulsified asphalt mortar for slab tracks in severe cold areas

Examples

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Effect test

Embodiment 1

[0066] In this example and Examples 2-4 below, the emulsified asphalt contained in the cement-emulsified asphalt mortar of the present invention was prepared.

[0067]In this embodiment, the emulsified asphalt adopts 70# heavy traffic road petroleum asphalt, the cationic emulsifier is octadecyltrimethylammonium chloride, and the nonionic emulsifier is alkyl nonylphenol polyoxyethylene ether, polyoxyethylene polymerized Degree 30, zwitterionic emulsifier is cocamidopropyl betaine, mineral emulsifier is bentonite, thickener is cellulose ether (molecular weight 40000), stabilizer is calcium chloride, interface modifier is polycarboxylic acid With alkylamine, the pH regulator is hydrochloric acid, and its composition is shown in Table 1.

[0068] Preparation method of emulsified asphalt:

[0069] Dehydrate 70# heavy traffic road petroleum asphalt at 100°C, and then control the temperature of the asphalt at 120°C-130°C;

[0070] Add the emulsifier and thickener measured in propor...

Embodiment 2

[0075] In this embodiment, the emulsified asphalt adopts 90# heavy traffic road petroleum asphalt, the cationic emulsifier is bis-octyl / decyl dimethyl ammonium chloride and aminated lignin, and the nonionic emulsifier is fatty acid polyoxyethylene ester, thickening The agent is cellulose ether and polyurethane, the mineral emulsifier is bentonite, the stabilizer is sodium chloride, the interface modifier is Span 20 and polycarboxylic acid, and the pH regulator is hydrochloric acid. The composition is shown in Table 1.

[0076] Preparation method of emulsified asphalt:

[0077] Dehydrate 90# heavy traffic road petroleum asphalt at 100°C, and then control the temperature of the asphalt at 120°C-130°C;

[0078] Add the emulsifier and thickener measured in proportion to the water at 60°C, adjust the pH value of the solution to the specified value, and control the temperature of the emulsifier solution to 50°C-60°C;

[0079] Pour the measured emulsifier solution into the cleaned e...

Embodiment 3

[0083] In this embodiment, the emulsified asphalt adopts 110# heavy traffic road petroleum asphalt, the cationic emulsifier is octadecyl trimethylammonium chloride and octadecyl dimethyl propamide, and the nonionic emulsifier is polyoxyethylene Ether, polyoxyethylene polymerization degree 40, zwitterionic emulsifier is lauryl imidazoline betaine, thickener is polyether, stabilizer ammonium chloride and calcium chloride, interface modifier is polycarboxylic acid, pH regulator It is glacial acetic acid, and its composition is as shown in Table 1.

[0084] Preparation method of emulsified asphalt:

[0085] Dehydrate 110# heavy traffic road petroleum asphalt at 100°C, and then control the temperature of the asphalt at 120°C-130°C;

[0086] Add the emulsifier and thickener measured in proportion to the water at 60°C, then adjust the pH value of the solution to the specified value, and control the temperature of the emulsifier solution to 50°C-60°C;

[0087] Pour the measured emul...

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Abstract

The invention provides cement-emulsified asphalt mortar and a preparation method thereof. The cement-emulsified asphalt mortar comprises the following components in part by weight: 110 to 160 parts of emulsified asphalt, 10 to 30 parts of polymer emulsion, 90 to 100 parts of cement, 150 to 250 parts of sand, 0 to 0.5 part of strength modifier, 0 to 10 parts of expanding agent, 0 to 1.0 parts of fiber, 0 to 0.05 part of cellulose, 0.004 to 0.015 part of aluminum powder, 0 to 0.1 part of defoaming agent, 0 to 1.2 parts of air entraining agent and 0 to 25 parts of water. The cement-emulsified asphalt mortar has good low-temperature resistance, and is suitable for the slab tracks of high-speed railways, passenger transport lines and urban high-speed light rails in severe cold areas.

Description

technical field [0001] The invention relates to a cement-emulsified asphalt mortar for slab-type ballastless tracks in severe cold regions, in particular to a cement-emulsified asphalt with good low temperature tolerance and used for high-speed railways, passenger dedicated lines, and urban high-speed light rail slab-type ballastless tracks in severe cold regions mortar. Background technique [0002] The cement emulsified asphalt mortar cushion is an important part of the slab ballastless track structure. Its main function is to support, adjust and provide elasticity and toughness. Maintenance costs have a major impact. Therefore, the research on cement emulsified asphalt mortar is one of the key technologies of slab ballastless track. [0003] Foreign cement emulsified asphalt mortar is divided into two types according to the different slab track structures and design concepts: one is CA mortar (Cement Asphalt Mortar) for Japanese unit slabs, and the other is BZ mortar (B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/06C04B28/08C04B24/36C04B24/32E01B29/00
Inventor 李海燕吴韶亮邵丕彦贾恒琼李洪刚王涛魏曌刘子科
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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