Validation of source approval of HMA surface mix aggregate : research summary.

PDFTech ReportSHA/MSU/4-2AggregatesElectromagnetic spectrumHot mix paving mixturesNeural networksQuarriesUnited StatesMaryland. State Highway Administration. Research DivisionWilson, Frederick K.Morgan State University. College of EngineeringMaryland. State Highway Administration. Research DivisionUS Transportation CollectionPavement surfaces must maintain an adequate level of friction in order to provide asafe surface for vehicles. The Maryland State Highway Administration (SHA) isresponsible for ensuring that flexible pavement construction, using hot mix asphalt(HMA), meets approved skid resistance standards, by selecting surface mix aggregatewith adequate frictional and durability characteristics. Conventional aggregate testingmethods are however, laborious, time\ue2\u20ac?consuming, and expensive. This researchproposed to develop faster, accurate, cost\ue2\u20ac?effective, and nondestructivemethodologies that utilize spectral properties and characteristics of aggregate samplessuch as their wavelength and reflectance to assess and evaluate HMA surface mixes