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A cationic emulsified modified asphalt and its application in slab ballastless track

A technology of emulsifying modified asphalt and cationic emulsifiers, which can be used in building components, building insulation materials, buildings, etc., and can solve the problems of limited elastic toughness and crack resistance at low temperature

Active Publication Date: 2016-10-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the cement-emulsified asphalt mortar prepared by the technical methods involved in these two patent applications has limited low-temperature elastic toughness and crack resistance, and does not solve the technical problems involved in the present invention well.

Method used

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  • A cationic emulsified modified asphalt and its application in slab ballastless track
  • A cationic emulsified modified asphalt and its application in slab ballastless track
  • A cationic emulsified modified asphalt and its application in slab ballastless track

Examples

Experimental program
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Effect test

Embodiment 1

[0060] In the present embodiment, low-molecular-weight modified asphalt is made of 70# heavy traffic road petroleum asphalt and dibutyl phthalate (DBP), and it is composed of 85 parts of 70# heavy traffic road petroleum asphalt, dioctyl phthalate 15 parts of grease, first heat the asphalt to 140-160°C to make it melt, then add dibutyl phthalate, continue heating and stirring to mix evenly, and then get DBP-70# asphalt, based on dynamic mechanical thermal analysis method The glass transition temperatures tested are shown in Table 1.

[0061] By DBP-70# asphalt, E-4875, MT-400 cellulose ether and water are used to manufacture cationic emulsified DBP-70# asphalt by emulsification process. The specific method is to first E-4875 and MT-400 cellulose ethers are dissolved in water to form soap, and the pH value is adjusted to about 2 with hydrochloric acid. Heat the soap liquid to 60°C-70°C, and heat the DBP-70# modified asphalt to 150°C-160°C, then input the hot asphalt and soap...

Embodiment 2

[0063] In the present embodiment, low-molecular-weight modified asphalt is made of 70# heavy traffic road petroleum asphalt and dioctyl phthalate (DOP), and it is composed of 90 parts of 70# heavy traffic road petroleum asphalt, dioctyl phthalate 10 parts of grease, first heat the asphalt to 140-160°C to melt it, then add dibutyl phthalate, continue heating and stirring to mix evenly, and then get DOP-70# asphalt, based on dynamic mechanical thermal analysis method The glass transition temperatures tested are shown in Table 1.

[0064] After the DOP-70# asphalt is prepared, the emulsified DOP-70# asphalt is prepared in the same process as in Example 1.

Embodiment 3

[0066] In the present embodiment, low-molecular modified asphalt is made of 90# heavy traffic road petroleum asphalt and dioctyl phthalate (DOP), and it is composed of 90 parts of 90# heavy traffic road petroleum asphalt, dioctyl phthalate 10 parts of grease, first heat the asphalt to 140-160°C to make it melt, then add dioctyl phthalate, continue heating and stirring to make it evenly mixed, and then get DOP-90# asphalt, which is tested based on dynamic mechanical analysis method The glass transition temperatures are listed in Table 1.

[0067] From DOP-90# asphalt, E-4868, MT-400 cellulose ether and water are used to manufacture cationic emulsified DOP-90# asphalt by emulsification process. The specific method is to first E-4868 and MT-400 cellulose ether are dissolved in water to form soap, and the pH value is adjusted to about 2 with hydrochloric acid. Heat the soap solution to 60°C-70°C, and heat the DOP-90# modified asphalt to 150°C-160°C, then input the hot asphalt ...

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Abstract

The invention relates to a cationic emulsified modified asphalt, which is composed of low-molecular modified petroleum asphalt, cationic emulsifier, stabilizer, and water; the application of the cationic emulsified modified asphalt provided by the invention in the slab ballastless track is The cement emulsified asphalt mortar poured into the gap between the track plate and the base plate of the CRTS I-type slab ballastless track contains cationic emulsified modified asphalt. The cationic emulsified modified asphalt provided by the present invention has excellent low temperature elasticity and toughness; the cement emulsified asphalt mortar for CRTS I type slab track prepared by using the cationic emulsified modified asphalt provided by the present invention has good fluidity and stability, and suitable mechanical properties , low temperature elastic toughness and excellent crack resistance, especially suitable for the application of mortar filling layer in high-speed railway or CRTS I-type slab ballastless track structure for passenger railway in severe cold area; it can meet the requirements of high-speed railway and passenger railway slab type Ballastless track structure dynamics and service requirements for 60 years.

Description

technical field [0001] The invention discloses a cationic emulsified modified asphalt and its application in the slab ballastless track, especially suitable for the application of the cement emulsified asphalt mortar filling layer of the CRTS I type slab ballastless track in severe cold regions, and the prepared cement emulsified asphalt mortar has It has excellent low-temperature crack resistance and belongs to the cross-technical field of slab ballastless track construction and building materials. Background technique [0002] CRTSI type (unit) slab ballastless track is one of the ballastless track structures adopted by high-speed railways with a speed of more than 300km per hour in my country. It consists of steel rails and fasteners, prefabricated concrete track slabs, cement emulsified asphalt mortar filling layers, and concrete bases Plates and other components form a top-to-bottom stacked structure. The cement emulsified asphalt mortar filling layer is constructed by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/12C08K3/00C08K5/00C08J3/03C04B24/36
Inventor 邓德华元强刘赞群谢友均
Owner CENT SOUTH UNIV
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