Asphalt modifier, preparation method thereof and application in asphalt composition

An asphalt modifier and asphalt composition technology, which is applied in building structures, building components, building insulation materials, etc., can solve the problems of high and low temperature performance, poor water damage resistance, unattainable warm mix asphalt pavement performance, and cost It can improve high temperature performance, reduce mixing and compaction temperature, and save energy.

Inactive Publication Date: 2019-07-19
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Warm mix asphalt concrete technology has not been widely promoted in my country at present. The main reason is that the performance of warm mix asphalt pavement cannot meet the requirements of hot mix asphalt pavemen

Method used

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  • Asphalt modifier, preparation method thereof and application in asphalt composition
  • Asphalt modifier, preparation method thereof and application in asphalt composition
  • Asphalt modifier, preparation method thereof and application in asphalt composition

Examples

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preparation example Construction

[0048] The present invention provides, in a second aspect, a method for preparing polyethylene wax with a melting point of 70-120° C. The preparation method includes the following steps:

[0049] (1) Mix 2,6-diacetylpyridine and dichloromethane, add 4-methoxy-2-methylaniline under stirring, add dropwise formic acid, react under heating and reflux conditions, spin dry, to obtain the first product;

[0050] (2) the first product is mixed with anhydrous methanol, and the obtained solid is filtered, washed, and dried in vacuo to obtain the second product;

[0051] (3) the second product is mixed with ferrous chloride tetrahydrate, the mixed system is evacuated with argon, then tetrahydrofuran is added under stirring conditions, and the reaction is maintained under the positive pressure state of argon in the system, and the reaction product is protected by argon Under filtration, the obtained solid is washed and vacuum-dried to obtain a late transition metal catalyst;

[0052] (4...

Embodiment 1

[0064] Mix 0.5 g of 2,6-diacetylpyridine and 30 mL of dichloromethane, add 1.5 mol of 4-methoxy-2-methylaniline under stirring, add 3 drops of formic acid dropwise, and then heat the reaction system to make it The temperature is raised to 50-55° C., and the mixture is refluxed for 48-50 hours, and then spin-dried to obtain a wine-red oil, namely the first product.

[0065] The first product was mixed with frozen anhydrous methanol, and a yellow-green powder was precipitated at this time. The obtained solid powder was filtered, washed with frozen anhydrous methanol, and vacuum-dried at 60° C. to obtain the second product.

[0066] The second product is mixed with ferrous chloride tetrahydrate, and the molar ratio of the two is (1~1.05): 1. The mixed system is evacuated with argon gas, and then tetrahydrofuran is added under stirring condition, and the system maintains the argon gas positive pressure state. After 50-60 minutes of reaction, stop stirring, let stand for 10 minutes...

Embodiment 2

[0069] An asphalt composition comprising the polyethylene wax prepared in Example 1 and SK-90 base asphalt, wherein the mass percentage of polyethylene wax is 3%, and the balance is SK-90 base asphalt.

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Abstract

The invention relates to an asphalt modifier containing polyethylene wax with a melting point of 70-120 DEG C, a preparation method of the polyethylene wax with the melting point of 70-120 DEG C and an asphalt composition containing the asphalt modifier. Compared with an asphalt binder composition without the asphalt modifier, the asphalt binder composition modified by the asphalt modifier provided by the invention can obviously improve high-temperature performance of an asphalt pavement, has no damages to low-temperature performance, simultaneously reduces the mixing and compaction temperatures of an asphalt mixture, and reduces energy consumption; compared with commercial Fischer-Tropsch wax, the polyethylene wax provided by the invention is more economical and practical; and the asphaltcomposition can be used for preparing various dense-graded asphalt concrete.

Description

technical field [0001] The present invention relates to the technical field of modified asphalt, in particular to an asphalt modifier containing polyethylene wax with a melting point of 70-120° C., a preparation method of polyethylene wax with a melting point of 70-120° C. and the asphalt containing the same Modifiers for bituminous compositions. Background technique [0002] In highway construction, asphalt pavement has become one of the most important building materials for highway pavement due to its good driving comfort and excellent performance, fast construction speed and convenient maintenance. With the development of transportation, the traffic volume increases and the load capacity increases. The original asphalt pavement is easily damaged due to its small load capacity, and the asphalt concrete pavement is facing severe challenges. The development of road construction requires higher and higher requirements for the quality of asphalt concrete pavement. It is hope...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L23/06C08F10/02
CPCC08F10/02C08L95/00C08L23/06
Inventor 颜录科李孟茹雷淼盖军李化毅晁敏李倩
Owner CHANGAN UNIV
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