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Emulsified asphalt for slab ballastless track

A technology of emulsified asphalt and asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of narrow temperature adaptation range, complex production process, easy layering, etc., and achieves convenient transportation and storage, good storage stability, Early intensity high effect

Inactive Publication Date: 2011-04-27
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The emulsified asphalt used to prepare emulsified asphalt cement CA mortar mainly has poor stability, high ionic strength and poor compatibility with the cement system, so that the prepared emulsified asphalt cement CA mortar has short working time, narrow temperature adaptability range, and easy delamination , Poor filling and other deficiencies, especially in terms of stability and early strength, it has not reached the technical conditions stipulated by the Ministry of Railways
However, foreign products have problems such as high prices, limited sources of raw materials, and complicated production processes.
[0005] CN200710078480.3 discloses an emulsified asphalt, but its low-temperature storage stability is poor, which is not conducive to transportation construction under cold weather conditions

Method used

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  • Emulsified asphalt for slab ballastless track
  • Emulsified asphalt for slab ballastless track
  • Emulsified asphalt for slab ballastless track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Carry out proportioning (weight ratio, the same below) with emulsified asphalt raw material according to following (Table 1):

[0032] Table 1 Formula of emulsified asphalt (100 parts of emulsified asphalt)

[0033]

[0034]

[0035] The manufacturing process of emulsified asphalt is as follows:

[0036] A. Dehydrate the asphalt at 110°C-130°C for 1 hour to 2 hours, then heat it gently to 130°C-160°C, and measure it for later use;

[0037] B. Heat the tap water to 45°C-65°C and measure it for later use;

[0038] C. Add the emulsifier and stabilizer to the standby hot water, stir evenly to make an emulsified aqueous solution, control the temperature at 45°C-65°C, and set aside;

[0039] D. Turn on the emulsifier system, pour the emulsified aqueous solution that meets the temperature requirements into the emulsification, and immediately pour in the hot asphalt that meets the temperature requirements, and the emulsified asphalt that meets the requirements is prepar...

Embodiment 2

[0041] Carry out proportioning (weight ratio, the same below) with emulsified asphalt raw material according to following (table 2):

[0042] Table 2 Formula of emulsified asphalt (100 parts of emulsified asphalt)

[0043]

[0044] The emulsified asphalt manufacturing process of embodiment 2 is as embodiment 1

Embodiment 3

[0046] Carry out proportioning (weight ratio, the same below) with emulsified asphalt raw material according to following (table 3):

[0047] Table 3 Formula table of emulsified asphalt (100 parts of emulsified asphalt)

[0048]

[0049] The emulsified asphalt manufacturing process of embodiment 3 is as embodiment 1

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Abstract

The invention provides emulsified asphalt for a slab ballastless track, which comprises the following materials in percentage by weight: 55-65% of asphalt, 3-10% of cationic emulsifier, 3-10% of nonionic emulsifier, 1-5% of stabilizer and the balance water. The emulsified asphalt can effectively avoid the separation of cement-asphalt (CA) mortar and enable the working time of CA mortar to be up to one hour. The CA mortar prepared from the emulsified asphalt has high early strength, and the air content, the fluidity, the early strength, the material separation degree and other indices of the CA mortar are easy to control. The emulsified asphalt has favorable storage stability, and can be stored for at least six months at 0-40 temperature without stratification and separation, thereby facilitating transportation and storage. Besides, the emulsified asphalt can not corrode steel devices and steel bars in concrete.

Description

technical field [0001] The invention relates to emulsified asphalt, in particular to emulsified asphalt for slab ballastless track cement emulsified asphalt mortar. technical background [0002] The slab-type slag-free track is widely used in the construction of high-speed railways at home and abroad because of its high level of industrialization, stable performance, convenient construction, and simple maintenance equipment. Cement-emulsified asphalt mortar (CA or CAM mortar for short) is a layer of about 50mm thick cushion poured between the concrete foundation bed and the track slab, which can play a role in supporting the prefabricated reinforced concrete track slab and leveling and damping , is an important technical means to improve the running speed, stability and comfort of high-speed trains. [0003] Ballastless track has the characteristics of low structural height, less maintenance workload, no ballast splashing when driving at high speed, good stability, strong a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L29/04C08L1/26C08K5/17C08K5/09C08K5/20C08K3/24C08K3/28C08J3/03
Inventor 常英
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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