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Title: Study of Asphalt Aging Through Beam Fatigue Test
Accession Number: 01553095
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: This study investigated the effects of aging on the flexural stiffness (E) and fatigue life (N) of asphalt concrete (AC) samples. Asphalt beam samples were prepared in the laboratory and subjected to various modes of aging (e.g., field aging, oven aging, forced air aging, normal air aging) for different periods. The flexural stiffnesses of these aged samples were determined by the four-point bending test. In addition, loose asphalt mixture was subjected to short-term oven aging up to 100 h. This loose mixture was used to prepare beam samples, which also were tested in the four-point bending mode. The flexural stiffness of unaged sample was determined as a reference value. Results showed that most of the aging occurred during the initial repetition of aging. Forced air caused more aging than the other modes. Overall, aged AC samples exhibited a shorter fatigue life (i.e., smaller N-value). The correlation of fatigue life with stiffness (i.e., N–E relationship) followed the same trend for unaged samples, aged loose mixtures, and field-aged samples. The results of this study led to the proposal of a revised fatigue life model to accommodate the aging of AC.
Monograph Title: Monograph Accession #: 01587029
Report/Paper Numbers: 15-5561
Language: English
Authors: Islam, M RashadulTarefder, Rafiqul APagination: pp 115–120
Publication Date: 2015
ISBN: 9780309369312
Media Type: Print
Features: Figures
(11)
; Photos; References
(27)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials
Files: TRIS, TRB, ATRI
Created Date: Dec 30 2014 1:52PM
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