Summary of Progress - National Cooperative Highway Research Program |
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63 and FY AASHO Road Test advisory aggregates air content alcohol proof analysis asphalt beams behavior bridge deck cement characteristics Completion Date conducted Contract pending Cornell Aeronautical Laboratory costs criteria curve Deicing density deterioration determine Effective Date elevation measurements elevation power spectrum Engineering estimates evaluation existing factors February February 15 Flexible Pavements frequency fresh concrete Funds FY 65 cont'd highway departments Highway Research Board indicated initial research investigation load longitudinal wave materials ment methods NCHRP Report obtained Ohio State University panel pavement pavement condition Pavement Performance Poisson's ratio predicting Principal Invest problem procedures project report Purdue University ratio Rayleigh wave relationships Research Agency residual stresses sample signal Southwest Research Institute specific spectra steel street stresses Structures surface survey techniques tion traffic volume transportation trips types ultrasonic University urban various vehicle velocity wavelengths