|Table of Contents|

Movement characteristics of asphalt mixture based on digital image disposal technology(PDF)

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

Issue:
2011年06期
Page:
1-5
Research Field:
Publishing date:
2011-12-20

Info

Title:
Movement characteristics of asphalt mixture based on digital image disposal technology
Author(s):
SHA Ai-min;  LI Ya-fei;  QIN Wen
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
road engineering;  asphalt mixture;  movement characteristic;  digital image processing technique;  homogeneity
PACS:
U414
DOI:
-
Abstract:
In order to analyze the reason of inhomogeneity happened in the process of asphalt mixtures rolling, this paper using digital image processing software, deals with AC-13 type asphalt mixture every 30 s vibration specimens profile, and then gets the charges with time of four aggregates distribution of 13.20 mm, 9.50 mm, 4.75 mm, 2.36 mm. The research results indicate that in the process of AC-13 asphalt mixtures rolling, 13.20 mm aggregate movement trend changes with time quite significantly, this aggregate moves reciprocating and periodically in both horizontal and vertical directions, in the test initial stage the vertical movement is more obvious, the effect on asphalt mixture segregation is the greatest. Compared to the 13.20 mm, the 9.50 mm aggregate's, movement trend changing with time intend to mitigate, the whole movement direction is in accord with the one of 13.20 mm, it also has influence on the asphalt mixture of segregation. Compared to the above two grade aggregates, the 4.75 mm and 2.36 mm aggregates' movement trend changing with time is not obvious. Basically their centers of gravity are concentrated in the center position of the profile. This shows that the two aggregates on the whole distribution are much uniform and have little impact on asphalt mixture segregation. 1 tab, 3 figs, 7 refs.

References:

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Memo

Memo:
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Last Update: 2011-12-20