Analytical Method to Measure Water in Asphalt and Its Application to Emulsion Residue Recovery
Primary Topic: Pavement Data Collection
Description: In preliminary studies, samples of asphalt were sent to a commercial laboratory for KF analysis. Inconsistent results suggested that atmospheric water may have contaminated the samples. New laboratory techniques-including storing samples, solvents, and glassware in a dry atmosphere and performing all sample preparation in a dry environment-were employed, and these techniques subsequently improved repeatability to 20parts per million (ppm)/sample.
FHWA Publication Number: FHWA-HRT-15-056
Publication Year: 2017