1982•Transportation Research Record Journal of the Transportation Research BoardRequires access
CHEMISTRY OF ASPHALT-AGGREGATE INTERACTION: RELATIONSHIP WITH PAVEMENT MOISTURE-DAMAGE PREDICTION TEST
J. C. BRIAND PETERSEN, H Plancher, E. Keith Ensley, R.L. Venable, G Miyake
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Abstract
Relationships were found between fundamental chemical and physical properties of the asphalt-aggregate bond and moisture-induced damage in asphalt pavement mixtures subjected to the Lottman conditioning procedure in National Cooperative Highway Research Program (NCHRP) Field Evaluation Project 4-8(2)/1. The relative tendency of different chemical functional types in asphalts to be strongly adsorbed on aggregate surfaces and their relative displacement from aggregate surfaces by water were determined. The affinity of the aggregates for pyridine-type nitrogen was also determined. For most asphalt-aggregate mixtures of the Lottman-NCHRP study, resistance to moisture-induced damage appeared to be controlled by a number of interrelated variables. These variables must be considered in conncert to rationalize pavement moisture damage. The sensitivity of pavement mixtures to moisture-induced damage was explained by considering fundamental physiochemical properties of the asphalt-aggregate bond. (Author)