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|Title: ||Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt|
|Authors: ||Cui, Yuanchen|
Glover, Charles J.
|Keywords: ||Pavement oxidation mode|
|Issue Date: ||2018|
|Citation: ||Cui, Y., Charles J. G., Braziunas, J., Sivilevicius, H., 2018. Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt. Construction and Building Materials. 161, 132-140. https://doi.org/10.1016/j.conbuildmat.2017.11.095|
|Series/Report no.: ||161;|
|Abstract: ||Oxygen diffusion and oxidative reaction are two main factors in asphalt oxidative aging discovered by
experiment, but the dynamic balance between them could not be easily studied by experimental methods due to its comprehensiveness. A pavement oxidation model was utilized to simulate this process in
asphalt: oxygen molecules penetrate into the asphalt film and then react with the asphalt molecules.
In some special cases, diffusion or reaction can become the determination step of asphalt oxidative
aging. Another factor, asphalt hardening, which is a result of oxidative reaction, slows the oxygen diffusion seriously and consequently. With the help of the model simulation, the efforts of binder reaction
kinetics, hardening properties and temperature on this balance have been studied and discussed in detail.
A new standard for asphalt binder, solely from oxidation aspect, includes high activation energy, low
hardening susceptibility and high hardening intercept. A new idea of anti-oxidant development was proposed. By decreasing oxygen diffusion, asphalt oxidation can be slowed down, but only works for oxygen
diffusion determined cases.|
|Appears in Collections:||Moksliniai straipsniai / Research articles|
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