NCHRP Synthesis 342: Chip Seal Best Practices
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NCHRP Synthesis 342:
Chip Seal Best Practices
(2005)
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Overview

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Description

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 342: Chip Seal Best Practices examines ways to assist in the development and implementation of pavement preservation programs by identifying the benefits of using chip seal as part of a preventive maintenance program and by highlighting advanced chip seal programs in use around the world. The report includes approximately 40 best practices in the areas of chip seal design methods, contract administration, equipment practices, construction practices, and performance measures. According to the report, the increased use of chip seals for maintenance can be a successful, cost-effective way of using preventive maintenance to preserve both low-volume and higher-volume pavements.

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Publication Info

120 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-ix
Summary 1-5
Chip Seals as a Tool for Preventive Maintenance 6-8
Regional Context 9-9
Chip Seal - Art or Science? 10-10
Chip Seal Terminology 11-11
Chip Seal Design Methods 12-13
Chip Seal Design Practices 14-17
Chip Seal Design Conclusions and Best Practices 18-18
Contract Management 19-20
Risk and Warranties 21-21
Contract Risk 22-22
Warranties 23-23
Contract Administration Conclusions and Best Practices 24-24
Aggregate Selection 25-27
Binder Selection 28-29
Material Selection Conclusions and Best Practices 30-31
Binder Distributor 32-33
Aggregate (Chip) Spreader 34-34
Rollers 35-35
Unique Equipment 36-37
Equipment Conclusions and Best Practices 38-38
Weather 39-39
Road Preparation 40-40
Spraying Operations 41-42
Aggregate Spreading 43-43
Rolling Operations 44-46
Sweeping and Brooming 47-47
Construction Practices for High-Volume Traffic 48-48
Quality Assurance and Quality Control 49-49
Field Testing 50-52
Construction Conclusions and Best Practices 53-54
Engineering-Based Performance Indicators 55-55
Qualitative Performance Indicators 56-58
Performance Conclusions and Best Practices 59-59
Common Characteristics of Excellent Chip Seal Programs 60-60
Case Study Conclusions and Best Practices 61-63
Suggestions for Future Research 64-65
References 66-68
Bibliography 69-69
Glossary 70-72
Appendix A - Chip Seal Synthesis Questionnaire 73-83
Appendix B - Survey Responses 84-99
Appendix C - Chip Seal Design Details 100-108
Appendix D - Innovative Chip Seal Case Studies 109-110
Abbreviations used without definitions in TRB publications 111-111

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