Composition for warm-mix asphalt pavements

A technology of warm-mix asphalt and composition, which is applied in building construction, solid waste management, building insulation materials, etc., and can solve the problems that it is difficult to simultaneously satisfy high-temperature plastic deformation resistance and low-temperature crack resistance, and difficult low-viscosity characteristics of asphalt

Active Publication Date: 2012-07-18
SK INNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies also have the problem that it is difficult to realize the low-viscosity characteristics of asphalt when the amount of powdered vulcanized rubber is increased
[0015] As mentioned above, when preparing warm-mix asphalt compositions, it is difficult to meet the requirements of high-temperature plastic deformation resistance and low-temperature crack resistance, so further research and development are needed

Method used

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  • Composition for warm-mix asphalt pavements
  • Composition for warm-mix asphalt pavements
  • Composition for warm-mix asphalt pavements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073]Bituminous compositions were prepared based on Table 2. 92.5 parts by weight of asphalt was heated to 163°C, and then 0.5 parts by weight of process oil and 3 parts by weight of MA-g-PE wax with a molecular weight of 4200 (grafting ratio: 8%) were mixed with the heated asphalt to form the first Then, while maintaining a constant temperature, the first mixture was stirred at a speed of 2,000 rpm for 0.2 h to completely melt. After that, 4 parts by weight of styrene-butadiene-styrene block copolymer (SBS) having a styrene content of 30.5% was added to the molten first mixture to form a second mixture, and then the second mixture was heated While reaching 175° C., the second mixture was evenly stirred at a rotation speed of 2,200 rpm for 2 hours to completely melt, thereby preparing an asphalt composition.

Embodiment 2 and comparative example 1 to 7

[0075] An asphalt composition was prepared in the same manner as in Example 1 except that the component contents were changed as shown in Table 2 below.

[0076] Table 2

[0077] Unit: parts by weight

[0078]

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Abstract

The invention relates to a composition for warm-mix asphalt pavements, including 91 to 94 mass% of asphalt, 3 to 5 mass% of thermoplastic elastomer, 2 to 4 mass% of maleic anhydride-grafted polyethylene (MA-g-PE) wax with graft rate from 4 to 10%, and 0.1 to 1 mass% of operation oil. The viscosity of the composition is not more than 700 cP under the temperature of 135 DEG C. The composition satisfies the requirements of high temperature plastic deformation resistance and low temperature crack resistance.

Description

technical field [0001] The invention relates to a warm-mix asphalt composition (for paving), more specifically, the invention relates to a warm-mix asphalt composition capable of simultaneously showing high-temperature plastic deformation resistance and low-temperature crack resistance. Background technique [0002] Global warming and global climate change are occurring due to rapid growth in energy consumption due to rapid industrialization and economic development. In addition, sudden increases in oil prices have a large impact on global economic activity. Therefore, recently, fuel-efficient products have been introduced from an economical as well as an environmental point of view. In particular, the "Kyoto Protocol" (Kyoto Protocol) adopted in 1997 stipulates a greenhouse gas emission trading system to reduce greenhouse gases including carbon dioxide, a joint implementation system, and the development of a clean energy system. Therefore, every country is actively workin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L51/06C08L53/02C08L9/06C08L7/02
CPCY02A30/30Y02W30/91C04B18/22C04B26/02C08L7/02C08L9/06C08L23/26C08L91/00C08L95/00C08L2207/322C08L2555/60C08L2555/72C08L2555/84
Inventor 禹垣准金祐成黄亨基曹太铉
Owner SK INNOVATION CO LTD
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