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Composition for modifying asphalt, modified asphalt, production methods of the composition and modified asphalt, and asphalt mixture

A technology of asphalt modification and manufacturing method, which is applied in the field of asphalt mixture and asphalt modification composition, which can solve the problems of high crushing process requirements and insufficient stability of modified asphalt, and reduce production costs and production costs , The effect of simple production process

Active Publication Date: 2021-09-28
李威风 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modified asphalt has high strength, high cohesion, and good cohesion, the stability of the modified asphalt is insufficient even if a large amount of crosslinking agent is used compared with the natural asphalt, and the mineral particles in the natural asphalt are Less than 15 microns, still have high requirements for crushing process

Method used

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  • Composition for modifying asphalt, modified asphalt, production methods of the composition and modified asphalt, and asphalt mixture
  • Composition for modifying asphalt, modified asphalt, production methods of the composition and modified asphalt, and asphalt mixture
  • Composition for modifying asphalt, modified asphalt, production methods of the composition and modified asphalt, and asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146]With the usage amount of rock asphalt as 100%, and the amount of surfactant as 1.5%, after rock asphalt and surfactant A (polyoxyalkylene alkylphenyl ether) are uniformly mixed, the particle size of the mineral particles is obtained through a pulverizer. Rock bitumen less than 800 mesh. Then according to the consumption of asphalt softener (aromatic oil) is 30%, the consumption of initiator A (di(2-ethylhexyl) peroxydicarbonate) is 2%, the consumption of crosslinking agent A (propylene glycol dimethacrylate) 1%, the amount of coupling agent A (silane coupling agent) is 2%, and the above-mentioned materials are mixed uniformly by using mechanical stirring at 90°C to obtain a composition for asphalt modification. With respect to base asphalt (70# asphalt) 100%, the amount of the asphalt modification composition is 25%, and then the asphalt modification composition is added to the reaction kettle containing base asphalt at 120°C and stirred at high speed for 30 minutes, and...

Embodiment 2～8、 comparative example 1～2

[0148] In Examples 2 to 8 and Comparative Examples 1 to 2, except that the amount of each component used to prepare the composition for asphalt modification was changed according to Table 1, the asphalt modification was prepared in the same manner as in Example 1. Composition and modified bitumen.

Embodiment 9

[0150] With the amount of rock asphalt used as 100%, and the amount of surfactant as 1.5%, after evenly mixing rock asphalt and surfactant B (alkylaryl sulfonate), the rock asphalt with a particle size of less than 800 meshes is obtained through a pulverizer . Then according to the consumption of asphalt softener (aromatic oil) is 30%, the consumption of initiator B (dibenzoyl peroxide) is 2%, and the consumption of crosslinking agent B (triallyl isocyanurate) is 1%. , the amount of coupling agent B (aluminate coupling agent) is 2%, and the above materials are mixed uniformly by mechanical stirring at 90° C. to obtain a composition for asphalt modification. With respect to 100% of base asphalt (70# asphalt), the consumption of asphalt modification composition is 25%, then the asphalt modification composition is added to 120 ℃ containing base asphalt in the reactor and stirred at high speed for 30min, then Fully react at 140-160°C for 25 minutes, and put the modified asphalt p...

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Abstract

The invention relates to a composition for modifying asphalt, modified asphalt, production methods of the composition and the modified asphalt, and an asphalt mixture. The composition for modifying asphalt comprises (A) natural asphalt, (B) an asphalt softening agent, (C) a cross-linking agent and (D) a coupling agent; relative to the total mass of the natural asphalt (A), the content of the asphalt softening agent (B) is 15-50% by mass, the content of the cross-linking agent (C) is 0.5-10% by mass, and the content of the coupling agent (D) is 1-6% by mass; and the size of mineral particles in the natural asphalt (A) is less than 800 meshes. The modified asphalt is a cured product of a mixture of the composition for modifying asphalt and matrix asphalt. The asphalt mixture provided by the invention contains the modified asphalt provided by the invention.

Description

technical field [0001] The invention relates to the field of asphalt modification for pavement, in particular to a composition for asphalt modification, modified asphalt, their manufacturing method and asphalt mixture. Background technique [0002] Asphalt is one of the most commonly used materials in high-grade highways. At present, road asphalt has accounted for more than 80% of the total consumption of asphalt. In China, more than 85% of high-grade highways use asphalt pavement structure, and the proportion of developed countries such as the United States reaches more than 90%. With the rapid development of our country's economy and the formation of expressway network, the road traffic volume is increasing day by day, and many problems have emerged on asphalt pavement. Some newly-built high-grade asphalt pavement, less than 1 to 2 years after it was opened to traffic, has various degrees of defects such as ruts, cracks, potholes, looseness, etc., which seriously affects ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L71/02C08K5/42C04B26/26
CPCC08L95/00C04B26/26C08L71/02C08K5/42C04B14/02
Inventor 李威风王超
Owner 李威风
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