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Effects of segregation on the initiation and propagation of top-down cracks

Title: Effects of segregation on the initiation and propagation of top-down cracks
Author(s): M. Schorsch, C.-M. Chang, G. Y. Baladi
Paper category : conference
Book title: Fifth International RILEM Conference on Reflective Cracking in Pavements
Editor(s): C. Petit, I.L. Al-Qadi and A. Millien
Print-ISBN: 2-912143-47-0
e-ISBN: 2912143764
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 3 - 10
Total Pages: 8
Nb references: 12
Language: English

Abstract: Top-down cracks (TDC) initiate at the pavement surface and propagate downwards. They have been observed with increasing frequency in bituminous pavements around the world. The literature presents conflicting views and various causes of TDC, including thermal stress, premature aging of the asphalt binder, pavement cross-section, and tire-pavement interaction. This paper addresses the effects of particle segregation in the asphalt concrete (AC) mixtures on the initiation and propagation of TDC. Field observations indicated that longitudinal and occasionally transverse cracks appear in medium and heavy segregated areas. Laboratory and field investigations were conducted to determine the existence of segregation and to verify whether or not the cracks in segregated areas are TDC. The results indicate that TDC initiate in segregated areas within two to three years after construction and they propagate at relatively high rates. This paper presents and discusses the crack propagation model developed in this study and the impact of segregation on pavement performance.

Online publication: 2004-04-15
Publication type : full_text
Public price (Euros): 0.00

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