Falling Weight Deflectometer Usage (2008)

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conTenTs 1 SUMMARy 3 CHAPTER ONE INTRODUCTION Purpose, 3 Research Methodology, 4 Scope, 4 Organization of Report, 5 Definitions, 5 7 CHAPTER TWO FALLING WEIGHT DEFLECTOMETER EqUIPMENT Falling Weight Deflectometer Ownership, 7 Falling Weight Deflectometer Types and Configurations, 7 Falling Weight Deflectometer Manufacturers, 8 Maintenance Practices, 10 12 CHAPTER THREE FALLING WEIGHT DEFLECTOMETER CALIBRATION Calibration Types, 12 Calibration Procedures, 12 Calibration Requirements, 13 Calibration Centers, 14 15 CHAPTER FOUR DATA COLLECTION, MANAGEMENT, AND STORAGE Data Collection Guidelines, 15 Data Management, 20 Data Storage, 20 21 CHAPTER FIVE DATA ANALySIS Data Analysis Methods, 21 Data Analysis Software, 22 Analysis Output File Types, 23 24 CHAPTER SIX PERSONNEL TRAINING qualifications, 24 Training Certifications, 25 Additional Training Opportunities, 25 27 CHAPTER SEVEN FALLING WEIGHT DEFLECTOMETER PROGRAM ADMINISTRATION Annual Budgeting, 27 Outsourcing Requirements, 27

29 CHAPTER EIGHT APPLICATIONS OF FALLING WEIGHT DEFLECTOMETER DATA—CASE STUDIES CASE 1. Data Collection and Analysis Refinement, 29 CASE 2. Pavement Rehabilitation and Overlay, 29 CASE 3. Joint Sealing Evaluation, 30 CASE 4. Pavement Management Systems, 30 CASE 5. Load Transfer Efficiency, 31 CASE 6. Void Detection, 31 CASE 7. Spring Load Restrictions, 31 CASE 8. Nonresilient Pavement Layer Behavior, 32 CASE 9. Utility Cuts, 32 CASE 10. Experimental Paving Materials, 32 CASE 11. Project Acceptance and Evaluation, 32 CASE 12. Conversion of Data From Other Nondestructive Testing Devices, 33 CASE 13. International Practices, 34 35 CHAPTER NINE CURRENT RESEARCH In-Motion Deflection Testing, 35 Portable Falling Weight Deflectometer, 35 Ground-Penetrating Radar Integration, 36 Network-Level Testing, 36 Mechanistic-Empirical Pavement Design, 36 37 CHAPTER TEN CONCLUSIONS 39 REFERENCES 43 BIBLIOGRAPHy 44 ABBREVIATIONS 45 APPENDIX A SURVEy qUESTIONNAIRE 68 APPENDIX B SUMMARy OF SURVEy RESULTS Part 1: Background Information, 68 Part 2: FWD Equipment Types, 69 Part 3: FWD Equipment Maintenance, 70 Part 4: FWD Equipment Calibration, 74 Part 5: General FWD Testing Procedures, 80 Part 6: FWD Field Testing—Flexible Pavements, 84 Part 7: FWD Field Testing—Rigid Pavements, 93 Part 8: FWD Computers, 103 Part 9: Data Analysis, 105 Part 10: Data Management and Storage, 108 Part 11: Personnel Training, 110 Part 12: FWD Program Administration—Part 1 of 2, 116 Part 13: FWD Program Administration—Part 2 of 2, 118