|Table of Contents|

Homogeneity evaluation of compacted asphalt mixture based on X-ray computed tomography(PDF)

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

Issue:
2010年06期
Page:
24-28
Research Field:
Publishing date:
2010-12-20

Info

Title:
Homogeneity evaluation of compacted asphalt mixture based on X-ray computed tomography
Author(s):
HU Chi-chun1;  WANG Duan-yi1;  Senthilmurugan Thyagarajan2
1. School of Traffic and Civil Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China; 2. FHWA Turner-Fairbank Highway Research Center, Mclean Fairfax 22101, Virginia, USA
Keywords:
road engineering;  asphalt mixture;  dynamic compaction;  homogeneity;  X-ray computed tomography
PACS:
U414.75
DOI:
-
Abstract:
The inhomogeneity of asphalt mixture mainly includes aggregate inhomogeneity and air void inhomogeneity. It influences the mechanical performance and life span of asphalt pavement whether the air void distribution is homogeneous. In order to evaluate the homogeneity of asphalt mixture during dynamic compaction, the specimens were scanned with X-ray computed tomography technology. The image slices were cut into slices with different sizes and the vertical air void distributions were calculated respectively. Research results reveal the air void content on both bottoms is much higher than that in the middle of the sample. Besides, the homogeneity is getting better when the compaction level increases. When the compaction level come to 55 times, the air void distributions of each part of the specimen are over-lapped very well which indicates the homogeneity of the compacted asphalt mixture is very good. 1 tab, 7 figs, 13 refs.

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Memo

Memo:
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Last Update: 2010-12-20