A tool based on the linear elastic fracture mechanics to analyze the outputs of the linear amplitude sweep (LAS) test

• Published in: Construction & building materials Vol. 264; p. 120255
• Main Authors: Corassa Garcia, Daniela, Leandro Faxina, Adalberto, Denner Leonel, Edson
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20-12-2020
• Subjects: Binder fatigue parameter; LAS test; Linear elastic fracture mechanics; Modified asphalt binders; Modified asphalt binders; Binder fatigue parameter; Linear elastic fracture mechanics; LAS test
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.120255

•The LEFM-based index (aLEFM) correlated well with the fracture-based one (af).•The measurability is higher for the aLEFM than for the af index.•The LAS tests results are influenced by the range of the complex shear modulus.•The VECD-based approach has shown to be the best tool to analyze the LAS test results.
This paper evaluates the application of an index (aLEFM) based on the Linear Elastic Fracture Mechanics as a tool for the outputs analyses of the Linear Amplitude Sweep (LAS) test. Ten binders (two neat and eight modified ones) were evaluated concerning the measurability of the indices aLEFM, af (fatigue tolerance index) and BFF (binder fatigue factor) and its correlation with the parameter Np20 derived from the Time Sweep test. The BFF parameter presented the highest measurability and correlation with Np20. The parameter aLEFM presented higher measurability as compared to af and good correlation with BFF.