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Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt

A technology of emulsified asphalt and modified asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of CA mortar quality fluctuations, different settling speeds, and increased production costs, so as to improve storage stability and facilitate transportation and storage, reducing production difficulty

Inactive Publication Date: 2009-08-19
GUANGZHOU LUXIANG TRAFFIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: (1) neoprene latex particles and emulsified asphalt particles are mechanically mixed with a larger size, and the relative density difference between the latex particles and the asphalt particles, the settling speed is different, which easily leads to the obtained modified emulsified asphalt The uniformity and stability are not good, and the latex is easy to separate from the emulsified asphalt after being stored in storage tanks and other containers for a period of time, and the longer the storage time, the more serious the separation phenomenon, which leads to It needs to be fully stirred again to reduce the concentration difference of the modified emulsified asphalt at the bottom or upper part of the tank
Therefore, using the emulsified asphalt prepared by this process to prepare CA mortar must be mixed and used immediately, resulting in low production efficiency and fluctuations in the quality of each batch of CA mortar
(2) Since the modified asphalt in CA mortar is obtained by mechanical mixing of polymer latex particles and asphalt particles, its flexibility is lower than that of modified asphalt after the polymer is only refined and dispersed in the asphalt with finer particles , using this process to make CA mortar with the same flexibility as the latter, it is necessary to use a large amount of polymer latex, resulting in an increase in production costs
(3) Since emulsified asphalt must be compatible with polymer latex, and there are few types of polymer latex on the market, the process has to be limited to emulsifiers and polymer latex varieties of emulsified asphalt

Method used

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  • Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt
  • Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt
  • Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt

Examples

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Embodiment 1

[0017] A kind of preparation method of high-speed railway or light rail slab ballastless track CA mortar special modified emulsified asphalt, it comprises the following steps:

[0018] Step 1: Prepare modified asphalt by using ordinary asphalt.

[0019] The common asphalt is selected from commercially available common petroleum asphalt, coal tar pitch or natural asphalt, preferably with a penetration of 4.0-14.0mm at 25°C, a ring and ball softening point of 40-60°C, and a ductility of 80-200cm at 15°C. of asphalt. In this example, commercially available No. 90 Sinopec Zhenhai Heavy Traffic Road Asphalt was selected.

[0020] The preparation of the modified asphalt includes: in parts by weight, mixing 94.5 parts of No. 90 Sinopec Zhenhai Heavy Traffic Road Asphalt, 3.5 parts of SBS791H particles (linear structure, molecular weight about 110,000) produced by polymer modifier Yuehua, compatible Add 2 parts of aromatic oil extracted from Jinan Oil Refinery, 0.12 parts of modifie...

Embodiment 2

[0027] Except that the polymer modifier used in the preparation of modified asphalt is 2.0 parts of SBS, and No. 90 Sinopec Zhenhai Heavy Traffic Road Asphalt is 96 parts, the types, proportions and production technology of modified asphalt of the other components are compared with Example 1 same.

Embodiment 3

[0029] Except that the polymer modifier used in the preparation of modified asphalt is 6 parts of SBS, and No. 90 Sinopec Zhenhai heavy traffic asphalt is 92 parts, the types, proportions and production process of modified asphalt are the same as in Example 1 .

[0030] It is worth mentioning that the proportions of the components in the modified emulsified asphalt provided in the above examples are not limited thereto, and those skilled in the art can flexibly adjust the proportions of the components according to actual needs, as long as the modified emulsified asphalt is satisfied by weight ratio. Sexual emulsified asphalt includes 45% to 65% of modified asphalt, 0.5% to 10% of cationic surfactant, 0.5% to 10% of nonionic surfactant, 0.1% to 10.0% of auxiliary agent, and the balance is water; the modified asphalt It includes 82.0-96.0% of base asphalt, 2-6% of polymer modifier, 0-10.0% of compatibilizer and 0-2.0% of modified asphalt stabilizer.

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Abstract

The invention relates to a modified emulsified asphalt which is specially used for high-speed railway or light rail plate type ballastless track CA sand pulp, the preparation method and the CA sand pulp comprising the modified emulsified asphalt. According to the weight percentage, the modified emulsified asphalt comprises the following components: 45-65% of modified asphalt, 0.5-10% of cation surface active agent, 0.5-10% of non-ionic surface active agent, 0.1-10.0% of accessory ingredient and the rest of water; wherein, the modified asphalt includes 82.0-96.0% of matrix asphalt, 2-6% of polymer modifier having the grain diameter being smaller than or equal to 5mum, 0-10.0% of compatilizer and 0-2.0% of modified asphalt stabilizing agent; the polymer modifier is selected from SBS, SIS, SEBS, SBR, CR, EPDM, NBR, BR or NR. The modified emulsified asphalt has good stability, and the preparation method can improve the production efficiency of the CA sand pulp and the stability of quality, and expands the varieties of the modified emulsified asphalt which is specially used for the CA sand pulp.

Description

technical field [0001] The invention relates to the technical field of slab track pavement, in particular to a CA mortar specially used for high-speed railway or light rail slab ballastless track, a modified emulsified asphalt specially used for the CA mortar and a preparation method thereof. Background technique [0002] With the rapid development of the national economy and the improvement of people's living standards, the construction of high-speed railways in China has been in full swing. So far, most of the high-speed railway projects approved by the State Council have adopted high-speed wheel-rail technology and slab ballastless track. [0003] Ballastless track, that is, a track that uses a whole piece of concrete bed, without stones and sleepers on the roadbed. The track can avoid the subsidence of the roadbed, ensure the long-term safe operation of the railway, reduce the dust caused by the train running, and beautify the environment. In addition, CA mortar (CEMEN...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/00C08L23/16C08L7/00C08L9/02C08L11/00C08L53/02C08K5/17C08K5/10C04B26/26C04B24/36
Inventor 陈守明陈伟三金士琦黎以丰
Owner GUANGZHOU LUXIANG TRAFFIC MATERIAL
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