Direct-casting type anti-track agent and preparation method

An anti-rutting agent, direct investment technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor compatibility between modifier and asphalt, complex and time-consuming preparation process, uneconomical and environmental protection, etc. Good capacity, improved flow capacity and processing performance, and reduced segregation

Active Publication Date: 2012-07-18
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method needs to go through the processes of swelling, dispersion, grinding and continued development, the preparation process is complicated and time-consuming, and the compatibility of rubber and plastic with asphalt is poor, and a large amount of solvent is required, which is not economical and environmentally friendly; in the second method, SBS And SBR has poor compatibility with asphalt, especially in the process of masterbatch cooling, transportation and storage, modifier segregation is easy to occur, resulting in unstable performance. In addition, the process of producing SBS and SBR modified asphalt needs to use a large amount of sulfur, which is easy polluted environment
[0004] All in all, these two methods have poor compatibility between modifier and asphalt, and serious segregation phenomenon.
In addition, as resource shortages and environmental pollution problems become increasingly acute, these two methods are time-consuming, wasteful, and pollute the environment, which is contrary to the purpose of building a low-carbon and energy-saving society in my country

Method used

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  • Direct-casting type anti-track agent and preparation method
  • Direct-casting type anti-track agent and preparation method
  • Direct-casting type anti-track agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 40 parts of recycled low-density polyethylene by weight; 15 parts of recycled polymethyl acrylate; 2 parts of recycled polyethylene wax; 1 part of nano shell powder with a particle size range of 100 nm to 150 nm; and 10 parts of hard pitch.

[0039] First, at 150℃, stir and heat the hard asphalt at 5r / min for 15min;

[0040] Then add recycled low-density polyethylene, recycled polymethyl acrylate, recycled polyethylene wax and nano shell powder to the hot hard asphalt, stir at a speed of 5r / min for 5 minutes; after completing this step, put the mixture at 140°C Heat for 5 hours;

[0041] Next, stir the mixture for 50 minutes at a speed of 30r / min at 160°C;

[0042] Finally, a single-screw extruder is used for forming, shearing and pelletizing to prepare a direct throw anti-rutting agent.

Embodiment 2

[0044] Weigh 30 parts of recycled low-density polyvinyl chloride by weight; 15 parts of recycled ethylene-vinyl acetate copolymer; 3 parts of recycled polyethylene wax; 1 part of nano-hydroxyapatite powder with a particle size range of 50nm~150nm; 8 parts of hard asphalt; 0.02 parts of anti-stripping agent.

[0045] First, heat the hard asphalt with stirring at 4r / min for 10min at 160℃;

[0046] Then add recycled low-density polyvinyl chloride, recycled ethylene-vinyl acetate copolymer, recycled polyethylene wax and nano-hydroxyapatite powder to the hot hard asphalt, stir at 8r / min for 5min; after completing this step, Heat the mixture at 135°C for 4.5h;

[0047] Then add the anti-stripping agent to the mixture and stir for 4 minutes at a speed of 3r / min; then stir the mixture for 40 minutes at a speed of 25r / min at 170°C; this embodiment calculates the need to add according to the design method of the asphalt mixture Anti-stripping agent. The anti-stripping agent is a surfactant o...

Embodiment 3

[0050] Weigh 20 parts of recycled polypropylene by weight; 10 parts of recycled polyethyl acrylate; 4 parts of recycled polyvinyl chloride wax; 2 parts of nano shrimp shell powder with a particle size range of 50nm~150nm; 9 parts of hard pitch; anti-stripping Agent 0.03 parts.

[0051] First, at 170℃, stir and heat the hard asphalt at 3r / min for 8min;

[0052] Then add recycled polypropylene; recycled polyethyl acrylate; recycled polyvinyl chloride wax; nano shrimp shell powder to the hot hard asphalt; stir at 6r / min for 5min; after completing this step, put the mixture at 130°C Heating for 4h;

[0053] Then add the anti-stripping agent to the mixture, stir at 4r / min for 5min; then at 160℃, stir the mixture at 20r / min for 30min; this example needs to be added according to the design method of asphalt mixture Anti-stripping agent. The anti-stripping agent is a surfactant of amine compounds or phosphoric hydroxyl organic compounds; it is mainly used to increase the adhesion of asphal...

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Abstract

The invention discloses a direct-casting type anti-track agent, which is formed by the following components by weight in mixing mode: 20 to 40 parts of regenerative polyolefine plastic, 10 to 20 parts of regenerative polyester plastic, 2 to 10 parts of regenerative wax, 2 to 10 parts of organic powder body with small particle size and 5 to 10 parts of gilsonite. A preparation method of the direct-casting type anti-crack agent and a method for preparing asphalt mixture by adopting the direct-casting type anti-crack agent are further disclosed. Particles of the direct-casting type anti-crack agent can be directly cast in hot aggregate on construction sites to be mixed with the hot aggregate in drying mode, intermittent construction can be conducted, and the direct-casting type anti-track agent lowers or reduces probability of separation of modified asphalt in the cooling, transporting and storing processes, and break through limit and restraint brought by continuous production and construction.

Description

Technical field [0001] The invention belongs to the field of composite polymer materials, and relates to a direct-investment type anti-rutting additive (brand name: Liqiang) that can improve the anti-rutting ability of an asphalt mixture pavement, a preparation method thereof, and preparation of asphalt by using the direct-investment type anti-rutting agent Mixing method. Background technique [0002] With the continuous improvement of my country's economic level, the demand for motor vehicles has increased sharply and the types of diversification have promoted the vigorous development of the asphalt road industry. Correspondingly, the requirements for the performance of asphalt roads are getting higher and higher. Under external conditions such as the increase of heavy-load vehicles and the deterioration of climatic conditions, how to prevent and reduce asphalt pavement diseases has become another hot spot for road construction, maintenance and research workers. Among the many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L23/06C08L27/06C08L23/12C08L31/04C08L33/12C08L23/08C08L33/14C08L33/08C08K3/26C08K3/32C08K3/22C04B26/26
Inventor 赫振华李交张毅邓国民夏庆宇徐韵淳闫国杰刘钢连萍马利志
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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