|Table of Contents|

Cooling shrinkage fracture characteristic of asphalt mixture(PDF)

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

Issue:
2012年03期
Page:
1-5
Research Field:
道路工程
Publishing date:

Info

Title:
Cooling shrinkage fracture characteristic of asphalt mixture
Author(s):
MA Biao;  MA Jin;  ZHOU Yu-peng
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
road engineering;  asphalt mixture;  cooling shrinkage;  fracture characteristic;  temperature
PACS:
U414.75
DOI:
-
Abstract:
The low-temperature crack is always one of main diseases of asphalt pavement in cold region. Using the asphalt mixture cooling shrinkage fracture tester, the cooling shrinkage fracture tests were conducted under different cooling speed and initial temperature with the modified asphalt mixtures consist of different bituminous and asphalt contents, aggregates and mineral grading compositions. Taking the absolute value of the fracture strength, the fracture temperature, the transition temperature and the temperature stress curve slope as the indices, the influence of different factors on cooling shrinkage fracture characteristics of asphalt mixture was comparative analyzed. The conclusions show that the modified asphalt grade, the asphalt content, the mineral grading composition, the cooling speed and the initial temperature have great influence on the cooling shrinkage fracture characteristics of modified asphalt mixture. Using the higher grade modified asphalt and adopting the optimal asphalt content determined by the Marshell method are benefit to develop the anti-crack performance of asphalt mixture. The asphalt mixture with the framework dense structure has a good anti-crack performance. Under the condition of the higher initial temperature and the rapid cooling speed, the crack probability of asphalt pavement is larger. 7 tabs, 4 figs, 7 refs.

References:

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Memo

Memo:
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Last Update: 2012-08-20