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Performance of warm mixed rubber asphalt mixture of stress absorbing layer(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年06期
Page:
49-56
Research Field:
道路工程
Publishing date:

Info

Title:
Performance of warm mixed rubber asphalt mixture of stress absorbing layer
Author(s):
PAN Rui
(Heilongjiang Province Urban Underground Space engineering Key Laboratory, Harbin University, Harbin 150086, Heilongjiang)
Keywords:
road engineering;  stress absorbing layer;  warm mix rubber asphalt mixture;  performance
PACS:
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DOI:
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Abstract:
In order to solve the problem of reflection cracks of semirigid based asphalt and old asphalt pavements, a method to prevent the occurrence of reflective cracks by setting the stressabsorbing layer of warm rubber asphalt mixture was suggested. The composition of SAKI mixed rubber asphalt mixture which used as stress absorbing layer was designed, according to the low temperature characteristics of cold regions. The optimal combination and production process of rubber asphalt were determined by orthogonal test. The raw materials, the mixing ratio and gradation of the mixture were determined, and the mixture specimen was formed by rotary compaction method. The performance of SAKⅠwarm mixed rubber asphalt mixture as stress absorbing layer was systematically studied, the hightemperature performance of the mixture was determined by the rutting test, and the lowtemperature performance of the mixture was determined by the lowtemperature bending test and the constrained specimen temperature stress test, and the waterstability performance of the mixture was determined by the immersed Marshall stability test and the freezethaw splitting test. The road performance of SAKⅠ warm rubber asphalt mixture, hot rubber asphalt mixture and Sasobit warm rubber asphalt mixture was compared. The results show that the SAKⅠwarming agent still has better high temperature stability, low temperature crack resistance and water stability, the road performance is good, when the mixing temperature and compacted temperature decreased by 30 ℃ of warm mixed rubber asphalt mixture. Compared with the breaking strength, turning point temperature and the slope of temperature stress curve, the freezebreaking temperature can more accurately evaluate the anticracking ability of warm rubber asphalt mixture at low temperature, and it can be used to evaluate the low temperature cracking resistance of warm rubber asphalt mixture. The road performance of SAKⅠ warm mix rubber asphalt mixture is better than that of SBS modified asphalt mixture, and it is more suitable application and use in stress absorption layer in cold regions. 10 tabs, 2 figs, 22 refs.

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Last Update: 2019-12-19