A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modulated Differential Scanning Calorimetry Study of Physical Hardening Rates in Asphalt Cements
Low-temperature cracking is a major cause of pavement failure, particularly in northern climates. Unfortunately, current asphalt cement test methods do not account for the effects of gradual physical hardening in the material during cold conditioning, and therefore cannot properly assess thermal cracking performance. Testing done using the extended bending beam rheometer (BBR) protocol has been shown to provide much better results, but the method is considered to be lengthy for regular specification grading. In this study, modulated differential scanning calorimetry (MDSC) was investigated to determine if it could be used as a more practical alternative to extended BBR testing. Asphalts from an Ontario pavement trial were tested to see how their glass transition temperatures changed with conditioning. Although a direct comparison to extended BBR data was unsuccessful, a new value was discovered that was able to relate the MDSC results to performance in service.
Modulated Differential Scanning Calorimetry Study of Physical Hardening Rates in Asphalt Cements
Low-temperature cracking is a major cause of pavement failure, particularly in northern climates. Unfortunately, current asphalt cement test methods do not account for the effects of gradual physical hardening in the material during cold conditioning, and therefore cannot properly assess thermal cracking performance. Testing done using the extended bending beam rheometer (BBR) protocol has been shown to provide much better results, but the method is considered to be lengthy for regular specification grading. In this study, modulated differential scanning calorimetry (MDSC) was investigated to determine if it could be used as a more practical alternative to extended BBR testing. Asphalts from an Ontario pavement trial were tested to see how their glass transition temperatures changed with conditioning. Although a direct comparison to extended BBR data was unsuccessful, a new value was discovered that was able to relate the MDSC results to performance in service.
Modulated Differential Scanning Calorimetry Study of Physical Hardening Rates in Asphalt Cements
Bricker, Ryan M. (author) / Hesp, Simon A.M. (author)
2013
12 Seiten, Bilder, Tabellen, Quellen
Conference paper
English
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