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Title: Physical Hardening: From Binders to Mixtures
Accession Number: 01333234
Record Type: Component
Abstract: The significant effect of physical hardening on asphalt binder properties at low temperature is well documented. However, there are very few studies addressing physical hardening in asphalt mixtures. This paper investigates physical hardening effect on asphalt mixtures creep behavior at low temperatures. Bending Beam Rheometer (BBR) creep tests were performed on asphalt binder and asphalt mixture beams conditioned at the test temperature for 1h and 24h to quantify physical hardening effects. Both laboratory-prepared and field samples were used. For all asphalt binders, the additional conditioning time resulted in significant increase in creep stiffness and in significant reduction in m-values. For asphalt mixtures, much less significant changes are observed, and the type of aggregate appears to be significant. A semi-empirical model is used to predict asphalt mixture creep stiffness from binder creep stiffness to better understand the role played by the aggregate matrix in physical hardening.
Monograph Title: Monograph Accession #: 01329018
Report/Paper Numbers: 11-1955
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Cannone Falchetto, AugustoTuros, MugurelMoon, Ki HoonMarasteanu, Mihai ODongre, Raj NPagination: 16p
Publication Date: 2011
Conference:
Transportation Research Board 90th Annual Meeting
Location:
Washington DC, United States Media Type: DVD
Features: Figures
(6)
; References
(37)
; Tables
(6)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials
Source Data: Transportation Research Board Annual Meeting 2011 Paper #11-1955
Files: TRIS, TRB
Created Date: Feb 17 2011 5:59PM
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