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Characterization of fracture and fatigue resistance on recycled polymer-modified asphalt pavements

Title: Characterization of fracture and fatigue resistance on recycled polymer-modified asphalt pavements
Author(s): L. N. Mohammad, Z. Wu, M. A. Aglan
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: 375 - 382
Total Pages: 8
Nb references: 13
Language: English

Abstract: This paper describes the evaluation of the fracture resistance of asphalt mixtures containing varied percentage of recycled polymer modified asphalt cements (RPMAC) in a Superpave mixture design. This method is based on the elastic-plastic fracture mechanics concept that leads to the laboratory determination of the critical strain energy release rate, also called the critical value of J-integral. A 19 mm Superpave mixture was designed using original polymer modified asphalt binder blended with different percentages of RPMAC binders and virgin aggregates. The mixture fracture resistance was evaluated using a three-point bending fracture test with semi-circular specimens cut from 150 mm by 57 mm SGC (Superpave gyratory compactor) compacted cylinders. Three notch depths were introduced at the middle of the flat surface of each specimen. The sensitivity of J-integral values with varied notch depths and different asphalt mixtures were evaluated and compared to the indirect tensile stress and strain test results. Analysis of the results indicated that the J-integral values from the semi-circular fracture test were fairly sensitive to the change in asphalt binder type. The fracture resistance ranking, based on the J-integral values, for the mixtures evaluated suggested that the semi-circular fracture test can be a valuable correlative tool in fatigue crack growth of asphalt mixtures.

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

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