ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 8 February 2011
Page Count: 8

Application of Statistical Methods in Evaluating Asphalt Mixture Homogeneity

Peng, Y.
Associate Professor, Institute of Transportation Engineering, Zhejiang Univ., Hangzhou,

Sun, L. J.
Professor, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji Univ., Shanghai,

(Received 21 October 2009; accepted 23 December 2010)

Abstract

Homogeneity is one of the most important factors affecting the performance-related properties of asphalt mixtures. Pavement condition surveys have shown various patterns of distress due to segregation and other types of non-uniformity. Using digital image processing, a statistical method was developed to evaluate asphalt mixture homogeneity quantitatively. Aggregate particle distribution in asphalt mixtures was described and analyzed by aggregate particle frequency statistic and distance statistic. The index of homogeneity was presented through aggregate particle distribution. The relevance of homogeneity to some mixture performance properties was also investigated. Results show that asphalt mixture homogeneity can be assessed quantitatively by the values of aggregate particle frequency statistic and distance statistic. Moreover, homogeneity dominates variations in mixture performance properties.

Keywords:
asphalt mixture, homogeneity, evaluation, statistic, digital image processing

Paper ID: JTE102795
DOI: 10.1520/JTE102795
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