- Author
-
Nguyen, T.
|
Byrd, W. E.
|
Seiler, J.
- Title
- Development of a Method for Measuring Water-Stripping Resistance of Asphale/Siliceous Aggregate Mixtures.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
Annual Progress Report 2
December 1995
6 p.
- Keywords
-
transportation
|
asphale
|
aggregates
|
water
- Identifiers
- Innovations Deserving Exploratory Analysis (IDEA) Project; Transit Cooperative Research Program (TCRP); National Cooperative Highway Research Program (NCHRP); IDEA project investigation and results; evaluation of effectiveness of antistripping agents by FTIR-MIR technique; correlating laboratory data with field data
- Abstract
- Laboratory techniques have been developed to measure the water susceptibility and water-striping resistance of asphalt/siliceous aggregate mixtures, asphalt binders, and aggregates. The techniques for field applications determine both the thickness of the interfacial water layer and the adhesion loss. The first technique, to measure water at the asphalt-aggregate interface, is nondestructive and is based on Fourier transform infrared spectroscopy in the multiple internal reflection mode (FTIR-MIR). Water reaching the asphalt/siliceous aggregate interface is detected by the evanescent wave produced by the total internal reflection of the infrared radiation. The second technique relies on the use of a pneumatic pull-off adhesion tester in conjunction with a porous stub that allows water to migrate through the asphalt film to the ashphalt-aggregate interface. Because of its ease of use, reporducibility, and portability, this test can rapidly determine the water-stripping resistance of an asphalt on a siliceous aggregate in the field as well as in the laboratory.