Effect of Moisture on Typical Virginia Surface Treatment Materials

Report No: 70-R21

Published in 1970

About the report:

Several aspects of the stripping and whip off characteristics of typical Virginia surface treatment materials were investigated. Sixty different binder-aggregate combinations were tested with the AASHO Designation T182-57 stripping test, a plate immersion stripping test, and a centrifuge whip off test, the last two of which were recently devised by the Virginia Highway Research Council. By statistically evaluating the results, it was concluded that: 1. The grade and source of asphalt and the type of aggregate cause significant differences in the stripping characteristics, 2. the whip off decreases with increased curing time, 3. there is no significant difference in performance between the crushed and uncrushed gravel, 4. the AASHO test has limited value in determining degrees of stripping, whereas the plate immersion test offers a valid method of numerically determining stripping differences between binder-aggregate combinations, 5. the AP-00 performs better than the emulsions, 6. the cationic emulsions perform better with carbonates than with silicates, 7. the limestone performs the best and uncrushed gravel the poorest with all asphalts, and 8. there is a slight interaction between asphalts and aggregates.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

E. D. Arnold

Last updated: February 12, 2024

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