A novel approach to evaluate fracture surfaces of aged and rejuvenator-restored asphalt using cryo-SEM and image analysis techniques

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• 作者：Ali Mokhtari^a ; ^{ali-mokhtari@uiowa.edu} ; Hosin David Lee^a ; ^{hlee@engineering.uiowa.edu} ; R. Christopher Williams^b ; ^{rwilliam@iastate.edu} ; C. Allan Guymon^c ; ^{allan-guymon@uiowa.edu} ; Jon P. Scholte^d ; ^{jon-scholte@uiowa.edu} ; Scott Schram^e ; ^{Scott.schram@dot.iowa.gov}
• 关键词：Aged asphalt ; Rejuvenator ; Cryo-Scanning Electron Microscopy ; Fracture surface ; Digital image processing ; Microscopy analysis ; Fourier Transform Infrared Spectroscopy
• 刊名：Construction and Building Materials
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：133
• 期：Complete
• 页码：301-313
• 全文大小：10073 K
• 卷排序：133

文摘

Low-temperature cracking potential was evaluated using Cryo-SEM and image analysis techniques. Cryo-SEM and image analysis are identified as promising techniques in monitoring the fracture surface of aged and rejuvenator-restored binders at low temperatures. Rejuvenated binder samples indicated less stiffness at lower temperatures compared to the aged binder samples as the proposed Fracture Index (FI) values confirmed. The Fourier Transform Infrared Spectroscopy (FTIR) results were consistent with results obtained from Cryo-SEM ranking method.