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A kind of high ductility and high elasticity modified asphalt composition and its preparation method

A technology of modified asphalt and high elasticity, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problems of easy cracks and other problems, and achieve the effects of avoiding looseness, good elasticity, and avoiding segregation

Active Publication Date: 2022-06-17
上海缤德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of ultra-thin overlay is prone to cracks in cement pavement

Method used

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  • A kind of high ductility and high elasticity modified asphalt composition and its preparation method
  • A kind of high ductility and high elasticity modified asphalt composition and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0039] Example 1-3, Comparative Example 1-2

[0040] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 asphalt 100 100 100 100 100 SBS 2 5 3 3 0 Polyvinyl Formal 8 4 6 0 6 Propylene-ethylene copolymer 5 5 5 5 5 Chloropropylene resin 4 4 4 4 4 tert-butylphenol formaldehyde resin 2 2 2 2 2 Softening point, °C 92.5 97.8 93.1 88.7 86.2 Elongation, cm 55.6 56.2 54.9 48.3 46.9 Viscosity at 60 degrees, Pa s 129560 183500 153940 99820 83240 Elastic recovery, % 99 94 97 82 84 Segregation softening point difference, °C 1.7 1.3 1.4 0.9 1 Elongation after aging, cm 40.3 37.6 39.2 34.4 32.1

[0041]From the comparison between the data of Example 1-3 and Comparative Example 1-2, it can be seen that the addition of SBS and polyvinyl formal can effectively improve the elastic recovery index of asphalt, both of which exceed 90%, a...

Embodiment 4-6， comparative example 3-4

[0043] Example 4 Example 5 Example 6 Comparative Example 3 Comparative Example 4 asphalt 100 100 100 100 100 SBS 3 3 3 3 3 Polyvinyl Formal 6 6 6 6 6 Propylene-ethylene copolymer 3 6 8 5 0 Chloropropylene resin 6 4 2 0 4 tert-butylphenol formaldehyde resin 2 2 2 2 2 Softening point, °C 93.4 94.2 94.5 91.9 89.3 Elongation, cm 53.1 55.2 56.9 41.8 38.6 Viscosity at 60 degrees, Pa s 123270 139830 153890 116380 108370 Elastic recovery, % 97 98 98 86 87 Segregation softening point difference, °C 1.2 1.4 1.7 1.6 1.4 Elongation after aging, cm 38.7 39.2 40.3 25.2 21.9

[0044] From the comparison between the data of Examples 4-6 and Comparative Examples 3-4, it can be seen that the addition of propylene-ethylene block copolymer and chloropropylene resin can greatly improve the 5 ℃ ductility index of asphalt, both exceeding 50cm, while the additio...

Embodiment 7-8

[0045] Examples 7-8, Comparative Example 5

[0046]

[0047]

[0048] From the comparison between the data of Examples 7-8 and Comparative Example 5, it can be seen that the addition of tert-butylphenol formaldehyde resin can effectively improve the segregation problem of asphalt. For asphalt without adding tert-butylphenol formaldehyde resin, the difference in segregation softening point reaches 6.2 ° C , the storage stability is very poor and cannot meet the technical requirements of modified asphalt, and the asphalt segregation difference of adding 3 parts by mass of tert-butylphenol formaldehyde resin is only 0.5 ℃, and almost no segregation occurs.

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Abstract

The invention relates to a high ductility and high elasticity modified asphalt composition and a preparation method thereof. The composition includes the following components by mass: 100 parts of asphalt, 2-5 parts of thermoplastic elastomer, 4-8 parts of polyvinyl acetal, 3-8 parts of propylene-ethylene block copolymer, 2-6 parts of chloropropylene resin, 1-3 parts of tert-butylphenol-formaldehyde resin. Heat the asphalt in parts by mass. During the heating process, stir the asphalt continuously to make the temperature uniform. At the same time, control the mixer speed at 1000-1500r / min. Add the thermoplastic elastomer, propylene-ethylene block copolymer and chloropropyl resin to Mixer, stir, then add polyvinyl acetal, and finally add tert-butylphenol formaldehyde resin, continue stirring, and obtain a high ductility and high elasticity modified asphalt composition. Compared with the existing technology, the present invention has good ductility and elasticity, stable performance, and no segregation phenomenon, and can be used in ultra-thin overlays to improve the deformation resistance of the mixture.

Description

Technical field [0001] The invention relates to the technical field of modified asphalt, and in particular to a high ductility and high elasticity modified asphalt composition and a preparation method thereof. Background technique [0002] Ultra-thin overlay is one of the most effective technical means in highway preventive maintenance projects. By directly laying a layer of ultra-thin overlay with a thickness of 1.0-1.5cm on the original road surface, the anti-skid performance and driving comfort of the road can be effectively improved. , and can also beautify the environment. Compared with traditional milling and paving methods, ultra-thin masks have the advantages of fast timeliness, material saving, obvious transformation effect and low cost. It is especially suitable for preventive maintenance, renovation and paving of cement pavements, bridge decks and tunnels. However, ultra-thin overlays are prone to cracks when applied to cement pavements. Ensuring the crack resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L29/14C08L53/00C08L53/02C08L61/08C08L27/06
CPCC08L95/00C08L2205/035C08L2205/02C08L29/14C08L53/00C08L53/02C08L27/06C08L61/06
Inventor 吕泉黄卫东李平辉张家伟
Owner 上海缤德新材料科技有限公司