Open AccessEvaluation of an eastern shale oil residue as an asphalt additive
Author(s) -
K P Thomas,
P.M. Harnsberger
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/574259
Subject(s) - asphalt , oil shale , rheology , moisture , residue (chemistry) , hardening (computing) , petroleum , materials science , environmental science , mineralogy , composite material , waste management , geology , chemistry , engineering , organic chemistry , layer (electronics)
An evaluation of eastern shale oil (ESO) residue as an asphalt additive to reduce oxidative age-hardening and moisture susceptibility was conducted. The ESO residue, having a viscosity of 23.9 Pa{sm_bullet}s at 60{degrees}C (140{degrees}F), was blended with three different petroleum-derived asphalts, AAD-1, AAK-1, and AAM-1, that are known to be very susceptible to oxidative aging. Rheological and infrared analyses of the unaged and aged asphalts and the blends were then conducted to evaluate oxidative age-hardening. In addition, the petroleum-derived asphalts and the blends were coated onto three different aggregates, Lithonia granite (RA), a low-absorption limestone (RD), and a silicious Gulf Coast gravel (RL), and compacted into briquets. Successive freeze-thaw cycling was then conducted to evaluate the moisture susceptibility of the prepared briquets. The abbreviations used above for the asphalts and the aggregates are part of the Strategic Highway Research Program nomenclature