Material Science - CH 6-8
viscous liquid/solid. waterproofing & adhesive property. pet based.
viscous black liquid, obtained by destructive distillation of coal, wood, shale.
Trinidad lake, gilsonite, and petroleum asphalt
Paving, Roofing, Protective Coatings
Asphaltine, resin, light oil, impurities
Properties of Asphalt
Adhesion, consistency, specific gravity, durability, rate of curing, ductility, aging and hardening, resistance to water
most important property. measure of resistance to flow
measure of resistance to flow under gravity. = visc of liquid/density
measures cement's ability to deform w/o breaking
Failures of asphalt concrete
rutting fatigue cracking, bleeding or flushing, raveling, stripping, or thermal cracking.
classifications of asphalt binders
performance grading, penetration grading, aged-residue grading