Modified asphalt mixture modifier and preparation method therefor

A technology of modified asphalt and mixture, which is applied in the direction of building insulation materials, building components, building structures, etc. It can solve the problems of asphalt aging, adverse effects of construction environment and operators, and even exceed 200°C, and achieve the improvement of low temperature resistance. Crack performance, broad market promotion and application prospects, and the effect of promoting compatibility

Inactive Publication Date: 2015-12-16
陕西长大博源公路养护科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional technical solution of producing modified asphalt first and then producing modified asphalt mixture has some technical, environmental and economical bottlenecks and deficiencies: (1) asphalt aging
The heating temperature during the production of modified asphalt is generally 180-190°C, or even over 200°C. At high temperatures, asphalt and modifiers will emit certain harmful gases, which will adversely affect the construction environment and operators.

Method used

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  • Modified asphalt mixture modifier and preparation method therefor
  • Modified asphalt mixture modifier and preparation method therefor
  • Modified asphalt mixture modifier and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Weigh 80kg of recycled polyethylene granules, 30kg of low-density polyethylene, 5kg of polyethylene wax, 10kg of ethylene-vinyl acetate copolymer, and 7kg of polyethylene masterbatch, add the above materials into the mixer, and mix them evenly to form component A.

[0060] Weigh 80kg of 30 mesh recycled tire rubber powder and 30kg of styrene-butadiene rubber powder into the mixer. During the mixing process, 4kg of styrene-butadiene latex with a solid content of 50% is evenly sprayed on the surface of the mixed particles in a mist, and then the mixed particles Drying is the B component.

[0061] Weigh 30kg of nano-calcium carbonate, 30kg of nano-silica, and 20kg of carbon black powder, add the above materials into the mixer, mix evenly, then add the mixture into the batch machine, and heat 30kg of lake asphalt to 160°C Melt it to a fluid state, then add the fluid asphalt dropwise to the powder in the agglomerate machine, and agglomerate into small particles, which is the...

Embodiment 5

[0068] Heat the AC-20 graded aggregates to 175-185°C, add the heated aggregates into the mixing tank of the mixing building according to the designed grading ratio, and add the modified aggregate prepared in Example 1 manually or by feeding machine. Asphalt mixture modifier, the additive amount of the modifier accounts for 0.5% of the asphalt mixture mass, mix for 25 seconds, then add 90# petroleum asphalt with a temperature of 155°C, mix for 15 seconds, then add mineral powder and mix for 15 seconds The modified asphalt mixture can be prepared in seconds. The discharge temperature of the modified asphalt mixture is 170°C, the paving temperature is 160°C, and the rolling temperature is 140°C.

[0069] The performance index test results of the above-mentioned modified asphalt mixture:

[0070] The dynamic stability of modified asphalt mixture rutting test is 6027 times / mm

[0071] Failure strain of modified asphalt mixture in low temperature bending test: 3023με

[0072] The...

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Abstract

The invention relates to a modified asphalt mixture modifier and a preparation method therefor. The modified asphalt mixture modifier is prepared from the following components in parts by weight: 60-100 parts of a component A, 15-25 parts of a component B and 15-25 parts of a component C, wherein the component A is prepared from the following components in parts by weight: 60-100 parts of recovered polyethylene, 20-40 parts of polyethylene, 10-20 parts of auxiliaries and 5-10 parts of color masterbatch; the component B is prepared from the following components in parts by weight: 60-100 parts of recovered rubber powder, 20-40 parts of rubber powder and 3-5 parts of latex; the component C is prepared from the following components in parts by weight: 60-100 parts of inorganic powder and 20-40 parts of an asphalt material. According to the modifier provided by the invention, the comprehensive performance of the modified asphalt mixture can be improved. By directly inputting the modifier into a stirring cylinder of a mixing plant, stirring and modification are synchronously implemented. The produced modified asphalt mixture is superior to a conventional modified asphalt mixture in performance.

Description

technical field [0001] The invention relates to a modified asphalt mixture modifier and a preparation method thereof. Background technique [0002] Asphalt mixture is a mixture of a certain grade of coarse and fine aggregates and an appropriate amount of asphalt binder, which are fully mixed under appropriate conditions. With the increase of road traffic volume, increase of traffic load, and deterioration of climate and environment, road construction, maintenance and reconstruction and expansion projects have higher and higher requirements for pavement materials. Ordinary pavement materials can no longer meet the needs of current traffic conditions. , Modified asphalt mixture is widely used because of its superior road performance. [0003] Traditional modified asphalt mixture is based on modified asphalt technology, which is a mixture of a certain gradation of coarse and fine aggregates and an appropriate amount of modified asphalt binder under appropriate conditions. Mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L21/00C08L9/06C08L9/04C08L95/00C08L53/02C08L11/02C08K3/00C08K3/26C08K3/36C08K3/04C08K3/34C08K5/20C08K13/02C04B26/26
CPCC08L23/06C04B22/06C04B22/10C04B24/2611C04B24/28C04B24/36C04B26/26C08J2323/06C08J2423/06C08K2201/011C08L2205/02C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L2207/20C08L2207/24C08L23/0853C08L21/00C08L9/06C08L95/00C08K3/00C08K2003/265C08K3/36C08K3/04C08L23/286C08L53/02C08L7/02C08K2003/2224C08K3/346C08L11/02C08K13/02C08K5/20C08K3/34C08L9/04
Inventor 商博明徐玮蔡乾东贾晓放徐培华童卫红
Owner 陕西长大博源公路养护科技有限公司
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