NCHRP Synthesis 381: Falling Weight Deflectometer Usage
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NCHRP Synthesis 381:
Falling Weight Deflectometer Usage
(2008)
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Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 381: Falling Weight Deflectometer Usage examines usage by state departments of transport of the falling weight deflectometer (FWD) to measure pavement deflections in response to a stationary dynamic load, similar to a passing wheel load.

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Publication Info

136 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-x
Summary 1-2
Purpose 3-3
Scope 4-4
Definitions 5-6
Falling Weight Deflectometer Types and Configurations 7-7
Falling Weight Deflectometer Manufacturers 8-9
Maintenance Practices 10-11
Calibration Procedures 12-12
Calibration Requirements 13-13
Calibration Centers 14-14
Data Collection Guidelines 15-19
Data Storage 20-20
Data Analysis Methods 21-21
Data Analysis Software 22-22
Analysis Output File Types 23-23
Qualifications 24-24
Additional Training Opportunities 25-26
Outsourcing Requirements 27-28
Case 2. Pavement Rehabilitation and Overlay 29-29
Case 4. Pavement Management Systems 30-30
Case 7. Spring Load Restrictions 31-31
Case 11. Project Acceptance and Evaluation 32-32
Case 12. Conversion of Data from Other Nondestructive Testing Devices 33-33
Case 13. International Practices 34-34
Portable Falling Weight Deflectometer 35-35
Mechanistic-Empirical Pavement Design 36-36
CHAPTER TEN - Conclusions 37-38
References 39-42
Bibliography 43-43
Abbreviations 44-44
APPENDIX A - Survey Questionnaire 45-67
Part 1: Background Information 68-68
Part 2: FWD Equipment Types 69-69
Part 3: FWD Equipment Maintenance 70-73
Part 4: FWD Equipment Calibration 74-79
Part 5: GeneraL FWD Testing Procedures 80-83
Part 6: FWD Field Testing - Flexible Pavements 84-92
Part 7: FWD Field Testing - Rigid Pavements 93-102
Part 8: FWD Computers 103-104
Part 9: Data Analysis 105-107
Part 10: Data Management and Storage 108-109
Part 11: Personnel Training 110-115
Part 12: FWD Program Administration - Part 1 of 2 116-117
Part 13: FWD Program Administration - Part 2 of 2 118-126

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