Evaluation of debonding and geosynthetics on critical stress inducement in AC overlays over PCC pavement: a numerical investigation

Title: Evaluation of debonding and geosynthetics on critical stress inducement in AC overlays over PCC pavement: a numerical investigation
Author(s): V. Tandon, S. Mahalungkar, K. Sobhan
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: 215 - 222
Total Pages: 8
Nb references: 8
Language: English

Abstract: To mitigate reflection cracking, geosynthetics has been commonly placed in the asphalt concrete layer; however, has not been consistently successful in mitigating reflection cracking. One of the major causes of failure can be attributed to the debonding of the overlay layer from the existing PCC layer.In this study, a numerical investigation was performed to identify the influence of debonding on the inducement of critical stresses. In addition, the impact of geosynthetics placement to mitigate reflection cracking was evaluated. ABAQUS software was used for modeling and von Mises stresses were used for evaluation purposes.The results of the numerical evaluation suggested that the von Mises stresses on top of the joint are significantly higher when the layers are debonded. The results of the evaluation also suggested that the von Mises stress can be significantly reduced by placement of geosynthetics and the levels of inducement almost dropped two to three times depending on the pavement structure.

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