Development of a Method for Measuring Water-Stripping Resistance of Asphalt/Siliceous Aggregate Mixtures.
Development of a Method for Measuring Water-Stripping
Resistance of Asphalt/Siliceous Aggregate Mixtures.
Nguyen, T.; Byrd, W. E.; Bentz, D. P.; Seiler, J. F.,
NISTIR 5865; 49 p. July 1996.
Sponsor:National Research Council, Washington, DC
Available from: National Technical Information Service
Order number: PB96-202296
building technology; adhesions; aggregates; asphalt;
bonding strength; FT-IR; interface; spectroscopy;
The main objective of this project was to develop a
nondestructive, sensitive, spectroscopic method for
measuring water stripping resistance at the molecular
level of asphalt/siliceous aggregate mixtures exposed to
water. The study consisted of three phases. Phase 1
involved the development of a technique based on Fourier
transform infrared spectroscopy in the multiple internal
reflection mode to quantify the water layer at the
interface between an asphalt and a siliceous aggregate.
Phase 2 was to develop a technique to measure the
adhesion loss of an asphalt/aggregate system exposed to
water environment. And Phase 3 aimed to relate the
quantity of the interfacial water layer with the
adhesion loss data. This final report summarizes the
research in those three areas. In addition, the report
also presents the results on the use of the
spectroscopic technique for evaluating the effectiveness
of different antistripping agents for asphalts. And
finally, based on the interfacial water information, the
mechanisms of stripping of an asphalt from a siliceous
aggregate and of the transport of water from the
environment to the asphalt/aggregate interface are