GAS PERMEABILITY MEASUREMENTS ON ASPHALT USIHO THE ELECTRODTNAMIC BALANCE
作者:
Ravindran Periasamy,
J. R. Newsome,
A. L. Andrady,
D. S. Ensor,
期刊:
Fuel Science and Technology International
(Taylor Available online 1992)
卷期:
Volume 10,
issue 4-6
页码: 1033-1057
ISSN:0884-3759
年代: 1992
DOI:10.1080/08843759208916032
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A novel experimental method developed for the measurement of the transport properties such as the diffusion coefficient, D, solubility, S, and permeability, P, for oxygen Into asphalt materials using an electrodynamic balance Is described. Both imaged and aged rolling thin-film oven test (RTFOT) asphalt particle samples In the 12 to 62 pm size range were suspended contactless and weighed In the balance to measure D, S, and P In the temperature range 17°C to 66°C. Volatilization rate data were obtained from the particle mass measurements made prior to the start of the sorption experiments. Sorption curves obtained in this study for unweathered asphalt samples showed a non-Pickian, two-stage type sorption behavior indicating the possibility of an additional mechanism other than diffusion. Analogous behavior in sorption was observed for weathered samples
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