High-elastic modified asphalt and preparation method thereof

A technology of modified asphalt and high elasticity, which can be applied to cohesive pavement paved on site, building components, building insulation materials, etc. It can solve the problems of unsuitable asphalt mixture and cracking of asphalt mixture, and improve the resistance to low temperature deformation ability and fatigue resistance, improved fatigue life, and excellent overall performance

Active Publication Date: 2012-04-11
重庆市智翔铺道技术工程有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The deformability of modified asphalt achieved through the above formula can generally meet road performance requirements when used on pavement. However, crac

Method used

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  • High-elastic modified asphalt and preparation method thereof
  • High-elastic modified asphalt and preparation method thereof
  • High-elastic modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
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[0022] Example 1

[0023] Heat 1000g Zhonghai 70# base asphalt to 180℃, and add 40g SBS, 20g SBR (polymer), 4g p-phenylenediamine antioxidant (anti-aging agent), 50g diphenyl octyl phosphate (plasticizer), 30g sequentially Dibutyl phthalate (plasticizer), swell for 60 minutes, then use a colloid mill to shear 2 times at high speed, and finally add 3 g of sulfur and stir at high speed for 3 hours.

[0024] Ordinary modified asphalt modification process and formula is to heat 1000g Zhonghai 70# base asphalt to 180℃, add 60g SBS, swell for 60 minutes, then use a colloid mill for high-speed shearing 2 times, finally add 3g sulfur, and stir for 3 hours. Got.

[0025] Table 1 Comparison of indexes of ordinary modified asphalt and modified asphalt of Example 1

[0026]

[0027]

[0028] Table 2 Performance comparison table of ordinary modified asphalt and modified asphalt used in Example 1 for SMA10 mixture of steel bridge deck paving surface

[0029]

[0030] Note: The size of the low tempe...

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Abstract

High-elastic modified asphalt is prepared by using base asphalt, polymer, an antiaging agent, a synthetic ester plasticizer, and a stabilizer as raw materials; the synthetic ester plasticizer is one of or any combination of more than one of di-n-butyl phthalate, di-n-hexyl phthalate, di-n-octyl phthalate, diphenyl octyl phosphate, trioctyl phosphate, or tributoxyethyl phosphate. An asphalt mixture prepared by the high-elastic modified asphalt of the invention is especially applicable to steel bridge deck pavement; with the guarantee that the high-temperature performance of the modified asphalt is not reduced greatly, the low-temperature deformation resistance and the fatigue resistance of the modified asphalt are greatly improved; the ductility at 5 DEG C of the high-elastic modified asphalt of the invention is increased by 2-3 times when compared with that of common modified asphalt; the low-temperature ultimate bending strain at -10 DEG C of the mixture of the high-elastic modifiedasphalt of the invention is increased nearly twice when compared with that of routine modified asphalt mixture, and the fatigue life is increased by more than 5 times; and the cracking time for steelbridge deck asphalt mixture pavement is obviously prolonged.

Description

technical field [0001] The invention relates to modified asphalt and a preparation method thereof, in particular to a high-elasticity modified asphalt and a preparation method thereof. Background technique [0002] The modified asphalt SMA structure has excellent thermal stability, rough and uniform surface, and anti-skid, especially the coarse aggregate intercalation structure is more suitable for the high temperature and rainy climate in southern my country, and has excellent anti-rutting performance under high temperature and heavy load. It has great advantages, so it is commonly used as steel bridge deck pavement wearing course in China. However, the deformation of the steel bridge deck asphalt mixture is obviously larger than that of the pavement mixture. The existing modified asphalt SMA will generally have longitudinal cracking or network cracking in about 3 years under the condition of large deformation at low temperature and repeated fatigue deformation. It is far f...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/06C08K13/02C08K5/12C08K5/523C08K5/521E01C7/26
Inventor 郝增恒徐光红
Owner 重庆市智翔铺道技术工程有限公司
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