1 / 24

Data Collection for Determining Pavement Condition

Data Collection for Determining Pavement Condition. Friction Profile Rut Depth Structure Distress identification. Friction Determination. Importance Inadequate friction leads to higher number of crashes Required to provide a safe road Can be used to evaluate materials-AWI Evaluated as

callie-flores
Download Presentation

Data Collection for Determining Pavement Condition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Data Collection for Determining Pavement Condition • Friction • Profile • Rut Depth • Structure • Distress identification

  2. Friction Determination • Importance • Inadequate friction leads to higher number of crashes • Required to provide a safe road • Can be used to evaluate materials-AWI • Evaluated as • Locked Wheel • Spin Up Test • Surface Texture Measurement

  3. Friction-Locked Wheel • ASTM 261 • Standard Tire • Water on surface • 40 MPH

  4. Friction tester- Locked Wheel

  5. Friction TesterSpin up • Wheel Lowered at 40 MPH • Friction force=torque/tire radius • f= Friction Force / Weight Better then Locked Wheel as less equipment is required

  6. Spin Up Friction Tester

  7. Road Surface Analyzer • A laser-based profiler using an accelerometer • established inertial reference. • ROSAN measures texture and longitudinal pavement profile at highway speeds. • Texture Analysis - Determination of Mean Profile • Depth Smoothness Analysis - 􀂾 Roughness Analysis - Determination of International • Roughness Index (IRI) & Ride Number (RN), using • ASTM E 950 & E 1926

  8. Road Surface Analyzer

  9. Roughness Measuring Rod and Level Dipstick profiler Road roughness Meter Profiling Devices

  10. Roughness Measurement • Present Serviceability Rating (PSR) • Based on ride quality defined by observer • Values from 1-5 • International Roughness Index • Based on Average Rectified Slope (ARS) determined from vehicle accumulated suspension motion divided by the distance m/km • IRI= 1000*ARS

  11. Dipstick Analyzer • Operation The Dipstick Road Profiler stands on two support legs.  The operator simply "walks" the Dipstick along a survey line alternately pivoting the instrument about each leg. Two digital displays show the elevation difference between the Dipstick's two support legs. Audible and visual signals alert the operator when each elevation difference reading is measured and automatically recorded.

  12. Profilograph

  13. Profiling Devices • Straight Edges • Low Speed Systems • Inertial Reference Systems • Can determine • Transverse Profile • Longitude Profile • Pavement Texture

  14. Ames Engineering LISA

  15. Laser RSTRoad Roughness Measurement

  16. Rut Depth • Uses many of the Standard Road Profilers • Uses transducers to measure differences in elevation between wheel paths and center of road

  17. Rut Depth

  18. Distress Surveys • Automatic and Continous • High Speed Digital Images • Used At Speeds Up to 60 MPG

  19. DynatestVideo Distress Vehicle

  20. Structural Evaluation • Falling Weight Deflectometers • Dynaflect Dynamic Force Generator • Benkleman Beam-Deflection Basin • Ground Penetrating Radar

  21. Structural TestFalling Weight Deflectometer

  22. DynaflectDynamic Deflection System

  23. Benkleman BeamGround Deflection

  24. RoadscanGround Penetrating Radar

More Related