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Storable waste and old rubber powder modified asphalt for alpine regions and preparation method thereof

A technology of waste rubber powder and modified asphalt, applied in the field of materials, can solve the problems of slow application progress of waste tire rubber powder rubber asphalt, poor thermal storage stability, construction limitations, etc. / Low temperature performance, the effect of improving high temperature performance

Active Publication Date: 2017-05-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the influence of rubber powder processing equipment and construction technology, the application of waste tire rubber powder rubber asphalt in the road industry has progressed slowly, especially the characteristics of rubber asphalt, such as easy segregation and poor high-temperature storage stability, still have great impact on construction. Restrictions restrict the development of rubber asphalt road technology
The main problem of rubber asphalt in practical application is that the molecular weight of tire rubber powder is very large, it is not easy to swell in asphalt, and there is a lack of chemical interaction between asphalt and rubber powder.
[0005] Moreover, the specific gravity of rubber powder is larger than that of asphalt, which has poor compatibility with asphalt and poor thermal storage stability. After the rubber powder absorbs the light components of asphalt, the viscosity of the asphalt increases greatly, which increases the difficulty of construction and makes it difficult to guarantee the quality of the project.

Method used

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  • Storable waste and old rubber powder modified asphalt for alpine regions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of used tire rubber powder modified asphalt provided in this embodiment, the raw materials include by weight parts: 100 parts of SK-90# base asphalt produced in Korea, 24 parts of 30 mesh waste tire rubber powder, polyoctene rubber vita joint 4 doses.

[0023] The waste tire rubber powder is the waste radial tire ground and pulverized by normal temperature process, the relative density is 1.15, the metal content is 0.02%, the fiber content is 0.08%, the ash content is 5%, and the carbon black content is 31%.

[0024] Polyoctene rubber Vita linking agent, commercially available " 8012" identifies trans-polyoctene.

[0025] The preparation method of rubber powder modified asphalt in the present embodiment comprises the following steps:

[0026] 1) Mix the weighed and dried 30-mesh rubber powder and polyoctene evenly for later use;

[0027] 2) Set the oven temperature to 140°C, put SK-90# matrix asphalt into the oven and heat until softened;

[0028] 3) Heat th...

Embodiment 2

[0034] Compared with Example 1, a kind of used tire rubber powder modified asphalt provided in this example, raw materials include by weight: 100 parts of SK-90# base asphalt produced in Korea; 24 parts of 30 mesh waste tire rubber powder 4.5 parts of polyoctene rubber Vita linking agent. Other steps and process parameter are the same as embodiment 1.

Embodiment 3

[0036] A kind of used tire rubber powder modified asphalt provided in this embodiment, the raw material includes by weight: 100 parts of SK-90# base asphalt produced in Korea; 24 parts of 40 mesh waste tire rubber powder; polyoctene rubber vita Linking agent 4.5 parts. Among them, the waste tire rubber powder is the waste radial tire ground and pulverized by the normal temperature process, with a relative density of 1.17, a metal content of 0.02%, a fiber content of 0.07%, an ash content of 6%, and a carbon black content of 33%. Other steps and process parameter are the same as embodiment 1.

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Abstract

The invention relates to storable waste and old rubber powder modified asphalt for alpine regions and a preparation method thereof. The storable waste and old rubber powder modified asphalt is prepared from the following components in parts by weight: 100 parts of matrix asphalt, 20 to 24 parts of rubber powder and 4 to 5 parts of poly octene rubber vita-inosculation. The preparation method comprises the following steps of (1) heating the matrix asphalt to 140 to 150 DEG C, and adding the rubber powder and the poly octene rubber vita-inosculation; (2) continuing to heat, timing when the temperature is increased to (205+ / -5) DEG C, and enabling a stirrer to continue to stir for (30+ / -5)min; (3) at the temperature of (205+ / -5) DEG C, enabling a shear to shear for (60+ / -5)min; (4) keeping the same temperature, continuing to stir for (60+ / -5)min; (5) at the temperature of 140 DEG C, developing for (30+ / -5)min, so as to obtain the rubber powder modified asphalt. The storable waste and old rubber powder modified asphalt and the preparation method have the advantages that the operation of the preparation method is simple; the stability and comprehensive property of the obtained modified asphalt are good, the cost is low, and the storage is convenient.

Description

technical field [0001] The invention relates to the field of materials, in particular to waste rubber powder modified asphalt which can be stored in alpine regions and a preparation method thereof. Background technique [0002] The seasonal temperature difference in alpine regions is large and the temperature is low. With the increasing traffic volume and vehicle load, the early disease problem of asphalt pavement is also increasing. Rubber asphalt based on waste tires has good temperature resistance. Performance, fatigue resistance, lower road noise and mechanical and temperature characteristics of road construction costs, it is expected to better deal with certain diseases, and asphalt resources are limited, making engineering construction difficult and cost increased, looking for an alternative has become a Problems to be solved. [0003] The natural rubber, synthetic rubber, sulfur, carbon black, anti-aging agent and other components contained in waste tire rubber powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L23/20C08K3/04
CPCC08L95/00C08L2205/03
Inventor 熊锐王小雯陈华鑫房建宏徐安花况栋梁关博文刘子铭乔宁蔡园
Owner CHANGAN UNIV
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