Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ QSpacearrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
addClaim

Rheological Evaluation of Field-Aged Asphalt Cements

Authors: Tetteh, Nathaniel;

Rheological Evaluation of Field-Aged Asphalt Cements

Abstract

The appearance of excessive and premature cracking on asphalt pavement after the winter seasons has been a major challenge and concern to transportation agencies in Canada and the northern U.S. states. At low temperatures, thermal stresses develop in the pavement causing detachment of the binder from the aggregates and a subsequent deterioration in stiffness which eventually leads to gross thermal cracking. Further distresses are induced on these roads in the form of wheel path fatigue by heavy vehicles leading to alligatortype cracks. Governments spend large portions of their yearly budgets on the maintenance and reconstruction of damaged roads. Through the collaborative efforts of government agencies and research institutions various laws and specifications have been implemented to ensure durability of asphalt pavement across various provinces. In this study, approved American Association of State and Highway Transportation Officials (AASHTO) and Ministry Transportation of Ontario (MTO) methods namely dynamic shear rheometer (DSR), extended bending beam rheometer (EBBR), and double edge-notched tension (DENT) tests were used to evaluate the rheological properties and long-term performance of recovered binders with 3 to 7 years of service. The recovered samples showed similar properties as their corresponding tank samples even though there exists a difference in their performance due to extent of aging which is only poorly simulated by the rolling thin film oven (RTFO) aging and pressure aging vessel (PAV) treatment of the tank samples. Easier, more automated test methods were attempted in this study to replace or complement the EBBR and DENT. Gel point temperature and Glover- Rowe analysis were conducted on all recovered samples. An r-squared value 0.72 was obtained for the correlation between EBBR and gel point temperature while that between iii critical tip opening displacement (CTOD) from DENT test and the Glover-Rowe parameter was 0.96. These results look promising and would require further studies to come to more precise decisions. Chemical analysis using X-ray fluorescence (XRF) and Fourier transform infrared (FTIR) were compared with rheological and physical tests, and able to distinguish good performing binders from poor ones.

Country
Canada
Related Organizations
Keywords

Double-Edged-Notched Tension ( DENT) Test, Asphalt Cement Specification, Field-Aged Asphalt Cement, Thermoreversible Aging, Gel-Point Temperature, Critical Crack Tip Displacement (CTOD), Fatigue Cracking, Glover-Rowe Damage Analysis, Extended Bending Beam Rheometer (EBBR) Test, Thermal Cracking

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green