Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

A technology of slab ballastless track and cement emulsified asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of cement compatibility not meeting requirements, mortar stability and fluidity difficult to meet, and achieve good mixing Synergistic effect, good emulsifying effect, good compatibility effect

Active Publication Date: 2009-07-08
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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  • Abstract
  • Description
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Problems solved by technology

However, the above-mentioned emulsified asphalt is used in the cement asphalt mortar of the unit slab ballastless track with low elastic modulus and low strength. For the cement asphalt mortar of the longitudinal slab ballastless track, due to the relatively high elastic modulus and high strength, the amount of cement is higher than that of the unit There are many more cement and asphalt mortars for slab ballastless tracks, which requires that emulsified asphalt for longitudinal slabs has better cement compatibility than emulsified asphalt for unit slabs. At present, the research and application of emulsified asphalt for longitudinal slab ballastless tracks is still limited. Rarely, if emulsified asphalt for unit slab ballastless track is used, the compatibility of cement cannot meet the requirements, and the stability and fluidity of the mortar prepared by using the above-mentioned emulsified asphalt can hardly meet the requirements of longitudinally connected slab ballastless track. Require

Method used

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  • Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar
  • Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar
  • Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

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Experimental program
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Effect test

Embodiment 1

[0036] The asphalt adopted in the emulsified asphalt provided by the present embodiment is No. 90 heavy traffic road petroleum asphalt (penetration is 88, the unit is 1 / 10mm, and the wax content is 1.7); anionic emulsifier is alkyl ether carboxylic acid Salts (the alkyl chain length is 16 carbon atoms); the auxiliary agent is caustic soda; the stabilizer is cellulose ether (molecular weight is about 50000), and its composition is shown in Table 3.

[0037] The preparation method of the emulsified asphalt provided by the present embodiment may further comprise the steps:

[0038] Dehydrate the asphalt at 100°C first, then heat it to about 130°C;

[0039] Dissolve emulsifiers, stabilizers and additives in water at 60°C according to the ratio to form a mixed aqueous solution;

[0040] Mix the heated asphalt with the above-mentioned mixed aqueous solution according to the proportion in Table 3, and emulsify through a colloid mill to obtain an asphalt emulsion;

[0041] The aspha...

Embodiment 2

[0043] The asphalt adopted in the emulsified asphalt provided by the present embodiment is No. 70 heavy traffic road petroleum asphalt (penetration is 64, the unit is 1 / 10mm, and the wax content is 2.0); anionic emulsifier is alkylbenzenesulfonic acid Salts (the alkyl chain length is 12 carbon atoms); the nonionic surfactant is lauryl sorbitan and polyoxyethylene ethers (PEO=15); the auxiliary agent is caustic soda, and the stabilizer is cellulose ether and polyether ( Molecular weight is about 80000), and its composition is as shown in table 3.

[0044] The preparation method of the emulsified asphalt provided by the present embodiment may further comprise the steps:

[0045] The bitumen is first dehydrated at 100°C, and then gently heated to about 130°C;

[0046] Dissolve emulsifiers, stabilizers and additives in water at 60°C according to the ratio to form a mixed aqueous solution;

[0047] Mix the heated asphalt with the above-mentioned mixed aqueous solution according t...

Embodiment 3

[0050] The asphalt adopted in the emulsified asphalt provided by the present embodiment is PG70-22 modified asphalt (wax content is 1.6); anionic emulsifier is alkyl sulfonate (alkyl chain length is 18 carbon atoms); The amphoteric emulsifier is an alkyl tertiary amine salt (the alkyl chain length is 8 carbon atoms); the auxiliary agent is caustic soda; the stabilizer is polyether (molecular weight is about 50,000), and its composition is shown in Table 3.

[0051] The preparation method of the emulsified asphalt provided by the present embodiment may further comprise the steps:

[0052] The asphalt is first dehydrated at 100°C, and then gently heated to about 165°C;

[0053] Dissolve emulsifiers, stabilizers and additives in water at 60°C according to the ratio to form a mixed aqueous solution;

[0054] Mix the heated asphalt with the above-mentioned mixed aqueous solution according to the proportion in Table 3, and emulsify through a colloid mill together to obtain an aspha...

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Abstract

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time, large temperature adapting range, no layering, good filling property, good physical-mechanical properties, good durability, and the like. The emulsified asphalt is applied to a plate type ballastless track, and in particular the longitudinal connecting plate type (CRTS II type) ballastless tracks of high-speed railways and passenger dedicated lines.

Description

technical field [0001] The invention relates to emulsified asphalt, in particular to emulsified asphalt used in cement-emulsified asphalt mortar of longitudinally connected slab ballastless track, and belongs to the field of slab ballastless track construction. Background technique [0002] my country is in the period of large-scale high-speed railway construction. The Ministry of Railways has announced that among the 20,000 kilometers of high-speed railways and passenger dedicated lines to be built in the next five years, nearly 4,000 kilometers of slab ballastless tracks will be built. Slab ballastless track is one of the main track structures of high-speed railways in my country. It is mainly composed of rail fasteners, prefabricated track slabs, cement emulsified asphalt mortar cushions, and concrete bases (or hydraulic support layers) from top to bottom. Among them, the cement emulsified asphalt mortar cushion is the key structural part, and its main functions are filli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08J3/03
Inventor 翁智财郑新国曾志谢永江刘竞仲新华王月华
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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