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OCR for page 85
85 APPENDIX A Glossary Abbreviations and Nomenclature LTPP Long Term Pavement Performance LWD Light Weight Deflectometer AAD Average Absolute Deviation M-D Moisture-Density AASHTO American Association of State Highway and M-E Mechanistic-Empirical Transportation Officials MEPDG Mechanistic-Empirical Pavement Design Guide ADCP Automated Dynamic Cone Penetrometer MMA Machine Milled Accelerometer ASNT American Society of Nondestructive Testing MnROAD Minnesota Road Research ASTM American Society for Testing and Materials MTV Material Transfer Vehicle BCI Base Curvature Index NCAT National Center for Asphalt Technology CBR California Bearing Ratio NDE Nondestructive Evaluation CCC Continuous Compaction Control NDT Nondestructive Testing CMV Compaction Meter Value ODMS Onboard Density Measuring System CT Circular Texture OGFC Open-Graded Friction Course DBP Deflection Basin Parameter OMV Oscillo-Meter-Value DCP Dynamic Cone Penetrometer PATB Permeable Asphalt Treated Base DMI Distance Measuring Instrument PCA Pavement Composition Analysis DOT Department of Transportation PCC Portland Cement Concrete EDG Electrical Density Gauge PFWD Portable Falling Weight Deflectometer EPIC Electronic Pavement Infrastructure, Inc. PG Performance Grade EMAT Electromagnetic-Acoustic Transducer PQI Pavement Quality Indicator FAA Federal Aviation Administration PR Penetration Rate FCC Federal Communication Commission PRS Performance Related Specification FFT Fast Fourier Transform PSPA Portable Seismic Pavement Analyzer FHWA Federal Highway Administration PTA Pavement Thickness Analysis FWD Falling Weight Deflectometer PVA Pavement Void Analysis GDP German Dynamic Plate PWL Percent Within Limits GPR Ground Penetrating Radar QA Quality Assurance HMA Hot Mix Asphalt QC Quality Control HWD Heavy Weight Deflectometer QC/QA Quality Control/Quality Acceptance IC Intelligent Compaction RAP Recycled Asphalt Pavement IE Impact Echo RCP Relative Compaction Profile IR Infrared RDD Rolling Dynamic Deflectometer IV Impact Value ROSAN Road Surface Analyzer JMF Job Mix Formula RTRRM Response Type Road Roughness Meter KTC Kentucky Transportation Center RWD Rolling Wheel Deflectometer LCL Lower Control Limit SASW Spectral-Analysis-of-Surface-Waves LSL Lower Specification Limit SHRP Strategic Highway Research Program

OCR for page 85
86 SMA Stone Matrix Asphalt MR = Resilient Modulus SPA Seismic Pavement Analyzer N = Phase spectrum SPL Standard Plate Load pa = Atmospheric pressure, psi SPS Special Pavement Studies P3/8 = Percent passing the 3/8 in. sieve SSG Soil Stiffness Gauge (now referred to as the P#4 = Percent passing the number 4 sieve GeoGauge) P#40 = Percent passing the number 40 sieve SSR Subgrade Stress Ratio P#200 = Percent passing the number 200 sieve TDR Time Domain Reflectometry PI = Plasticity index TF Transfer Function PR = Penetration rate (from DCP) TFT TRL Foundation Tester Q = Radiation emitted from an object TTI Texas Transportation Index Silt = Percent silt in a soil UBW Ultrasonic Body Wave t = Travel time of a wave between the source and UCL Upper Control Limit receiver USL Upper Specification Limit tGPR = Time delay between the reflections from the top USW Ultrasonic Surface Wave and bottom of the layer from GPR readings VMA Voids in Mineral Aggregate TIR = Absolute temperature of an object VTM Voids in Total Mix To[IR] = Absolute temperature of the surroundings TF = Transfer function V = Velocity of object from vibrations Terms and Symbols VGPR = Velocity from GPR reflection a = Acceleration VP = Compression wave velocity AGPR = Amplitude of the reflection from the top of the VR = Rayleigh (surface) wave velocity layer VS = Shear wave velocity aGPR = Regression coefficient from calibration of GPR ws = Water content of the soil data using cores wopt = Optimum water content of the soil; AASHTO Apl = Amplitude of the reflection from a metal plate T 180 bGPR = Regression coefficient from calibration of GPR X = Receiver spacing data using cores X(f) = FFT of the hammer input CBR = California Bearing Ratio Y(f) = FFT of the receiver output C = Damping coefficient = Displacement Clay = Percent clay in the soil a[GPR] = Dielectric constant of the layer D = Depth of the reflector s[GPR] = Dielectric constant of surface layer E = Young's or elastic modulus = Bulk stress E = Emissivity of an object = Phase angle or shift Evib = Dynamic stiffness under vibratory loading = Mass density f = frequency 1,2,3 = Principal stress fr = Resonance frequency IR = Stefan-Boltzman constant G = Shear modulus oct = Octahedral shear stress IV = Impact Value = Lame's constant k1,2,3 = Regression constants from resilient modulus tests = Density of layer K = Spring stiffness Max = Maximum dry density of a material, AASHTO Lr = Wave length T 180 LL = Liquid limit s = Dry density of a material M = Constrained or Bulk modulus = Poisson's ratio