What is it about?
The present study compares two techniques namely Wilhelmy plate (WP) and Sessile drop (SD) methods to rank moisture damage susceptibility of twelve different asphalt-aggregate combinations. Three asphalt binders: unmodified (VG30), polymer modified (PMB40), and crumb rubber modified (CRMB60) binders, and four aggregates (basalt, limestone, granite, and sandstone) were selected in this study. The contact angle of selected asphalt binders was measured using both WP and SD techniques. Thereafter, surface free energy (SFE) components of asphalt binders, bonding energy and compatibility ratio (CR) of selected asphalt-aggregate combinations were estimated. The results showed that the SD method showed a high variability in the measurement of contact angle of asphalt binders compared to the WP method. The SD method found to be less sensitive to capture acid component of SFE of asphalt binders.
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Why is it important?
• The CA measurement by SD method showed high variability compared to the WP method. • The SFE of asphalt measured by the SD method had higher values than that of WP. • SD method found to be less sensitive to capture acidic component of SFE of asphalt. • CR value of 0.25 by SD method would be approximately equal to 0.5 by WP method.
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I hope this article is helpful for many researchers
Ayyanna Habal
Indian Institute of Technology Bombay
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This page is a summary of: Comparison of Wilhelmy plate and Sessile drop methods to rank moisture damage susceptibility of asphalt – Aggregates combinations, Construction and Building Materials, June 2016, Elsevier,
DOI: 10.1016/j.conbuildmat.2016.03.060.
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