High-performance decrosslinked rubber asphalt and preparation method thereof

A rubber asphalt and decrosslinking technology, which is applied in building components, building insulation materials, plastic recycling, etc., to achieve the effects of improving dissolving capacity, improving economic and social benefits, and good workability

Active Publication Date: 2022-02-18
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to overcome the deficiencies of the prior art, the present invention provides a high-performance decrosslinked rubber asphalt and its preparation method, which solves the problem of dissolving and dispersing rubber powder in asphalt, and improves the performance and stability of rubber asphalt

Method used

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  • High-performance decrosslinked rubber asphalt and preparation method thereof
  • High-performance decrosslinked rubber asphalt and preparation method thereof
  • High-performance decrosslinked rubber asphalt and preparation method thereof

Examples

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Embodiment 1

[0044] Example 1: The method of the present invention is used to prepare decrosslinked rubber powder, the method of the present invention is used to prepare asphalt rubber, and then the performance test of asphalt and asphalt mixture is carried out.

[0045] First, use a single-screw extruder to carry out preliminary decrosslinking treatment on rubber powder, mix 97.5% by mass of 40 mesh waste tire rubber powder and 2.5% by mass of aromatic oil, and pass through the first stage of the screw at 280°C in a sealed oxygen barrier , the passage time is 6min, and then pass through the second cooling screw, the passage time is 5min, and the discharge temperature is 60°C;

[0046] Then, the rubber powder was decrosslinked again and premixed with the isolation modifier by using an internal mixer: the above-mentioned pretreated rubber powder of 88% by mass, 5% by mass of linear SBS791-H modifier and 7 % mass of polyethylene wax is added to the internal mixer, set the internal mixer spee...

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Abstract

The invention provides high-performance decrosslinked rubber asphalt and a preparation method thereof, when the rubber powder is deeply decrosslinked, a polyolefin modifier and an SBS modifier (styrene-butadiene block polymer) are doped as separants of decrosslinked rubber, so that the viscosity of the decrosslinked rubber can be reduced, the cohesion of the decrosslinked rubber is prevented, the polyolefin modifier is rapidly melted at high temperature, the rubber particles are rapidly opened, and thus the dispersity of the rubber particles can be remarkably enhanced. Meanwhile, the polyolefin and the SBS modifier can obviously improve the performance of the asphalt. The decrosslinked rubber is deeply degraded, so that the cohesive force of the rubber asphalt is improved, the Brookfield viscosity of the rubber asphalt is reduced, the construction performance is improved, and a relatively high rubber mixing amount is achieved.

Description

technical field [0001] The invention relates to the field of asphalt, in particular to a high-performance decrosslinked rubber asphalt and a preparation method thereof. Background technique [0002] With the development of the automobile industry and the improvement of people's living standards, the number of automobiles is increasing rapidly, and the output of waste tires is increasing at a rate of 8%-10% per year. It is urgent to use resources. The waste tires are processed into rubber powder and applied to asphalt improvement. It has become an important way of resource utilization of waste tires. The use of waste tire rubber powder in asphalt pavement is a technology to practice "green transportation". Waste tires contain natural rubber, styrene-butadiene rubber (SBR) and other high-molecular polymers and additives such as anti-aging agents, which are effective ingredients to improve the performance of asphalt. [0003] At present, the traditional MacDonald wet process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L19/00C08L53/02C08L23/06C08L95/00C08J11/10
CPCC08L19/003C08L95/00C08J11/10C08J2319/00C08L53/02C08L23/06Y02W30/62
Inventor 王海朋张蓉张晓华朱亚琴徐洪彬罗丝雨张凌波
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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