High-Temperature Performance of Asphalt Mortar Using Surface and Interface Theory
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 8
Abstract
Through contact angle test, the contact angles of mineral powder and asphalt were obtained; Using contact angle measurements, the surface energy parameters of the mineral powder and asphalt were calculated; Work of adhesion of the asphalt mortar with different mineral powder diameters and different mineral powder–bitumen ratios and was calculated according to surface and interface theory. The high temperature performance parameters of asphalt mortar were tested by means of the softening point and dynamic-shear-rheometer (DSR) test. The analysis results indicate that variations of the contact angles of asphalt with the changes of asphalt type is much less than that of the contact angle of mineral powder with the changes in the filler diameter. The contact angle of mineral powder increases when the diameter of mineral powder decreases and the surface tension increases. Using the same mineral powder bitumen ratio mortar, the work of adhesion decreases with decreasing filler diameter, but the specific work of adhesion increases when the diameter of the mineral powder decreases. At the same filler-bitumen ratio, the softening point and rutting factor () of asphalt mortar increase as the diameter of the mineral powder decreases.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 8 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 6, 2013
Accepted: Aug 20, 2014
Published online: Oct 7, 2014
Discussion open until: Mar 7, 2015
Published in print: Aug 1, 2015
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