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Title: TIME-TEMPERATURE SUPERPOSITION FOR ASPHALT CONCRETE AT LARGE COMPRESSIVE STRAINS
Accession Number: 00931969
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: A study was performed to evaluate whether time-temperature superposition principles would continue to apply to the behavior of asphalt concrete beyond the commonly assumed small strain (<100 micro epsilon) limits. A series of unconfined uniaxial compression constant crosshead displacement rate tests were performed to large-strain values. The measured axial stress versus axial strain data were cross-plotted to produce stress versus reduced time master curves and corresponding temperature shift functions at various strain levels to determine the maximum strain level at which time-temperature superposition remains valid. The results suggest that asphalt concrete remains a thermorheologically simple material well into the postpeak region (i.e., that time-temperature superposition is valid throughout the useful stress-strain response). The results further suggest that the temperature shift function may be only a weak function of strain level. For many practical engineering purposes, however, the differences between the small-strain and large-strain temperature shift relations may be of negligible importance.
Supplemental Notes: This paper appears in Transportation Research Record No. 1789, Bituminous Paving Mixtures 2002.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Schwartz, C WGibson, NSchapery, R APagination: p. 101-112
Publication Date: 2002
Serial: ISBN: 0309077141
Features: Figures
(13)
; References
(12)
TRT Terms: Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials
Files: TRIS, TRB, ATRI
Created Date: Oct 4 2002 12:00AM
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