NCHRP Report 539: Aggregate Properties and the Performance of Superpave-Designed Hot-Mix Asphalt
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NCHRP Report 539:
Aggregate Properties and the Performance of Superpave-Designed Hot-Mix Asphalt
(2005)
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Overview

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Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 539: Aggregate Properties and the Performance of Superpave-Designed Hot-Mix Asphalt examines technical literature available since the conclusion of the Strategic Highway Research Program in 1993 on the impact of the aggregate properties specified by the Superpave mix design method on the performance of hot-mix asphalt. The performance of hot-mix asphalt (HMA) is largely determined by the characteristics of its constituents: asphalt binder and aggregate. In developing the Superpave mix design method, the Strategic Highway Research Program (SHRP, 1987â€"1993) targeted the properties of asphalt binders and HMA and their effects on pavement performance.

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Publication Info

101 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-x
Summary 1-11
1.1 Introduction 12-12
1.3 Scope 13-13
2.2.1 Background 14-14
2.2.2 Relationship Between Percent Coarse Aggregate Fractured Faces and Performance 15-15
2.2.4 Alternative Methods of Measuring Coarse Aggregate Angularity 16-17
2.2.5 Summary of Research Related to Coarse Aggregate Angularity 18-18
2.3.2 Relationship Between F&E and Performance 19-21
2.3.3 Precision of F&E Tests 22-22
2.3.4 Summary of Research Related to F&E 23-23
2.4.2 Uncompacted Voids Content in Fine Aggregate 24-24
2.4.3 Alternative Methods of Measuring FAA 25-25
2.4.4 Relationships Between Fine Aggregate Shape, Angularity, and Texture and HMA Performance 26-33
2.4.6 Summary of Findings on Fine Aggregate Texture and Angularity 34-34
2.5.2 Video Imaging Systems 35-36
2.5.3 Image Analysis 37-38
2.6.4 Methylene Blue Test 39-39
2.6.6 Net Adsorption Test 40-40
2.6.8 Summary of Aggregate Tests Related to Moisture Damage 41-41
2.7.1 Aggregate Tests Related to Abrasion Resistance and Breakdown 42-47
2.7.2 Aggregate Tests Related to Weathering and Freeze-Thaw Durability 48-48
2.7.4 Summary of Tests Related to Aggregate Durability 49-49
2.8.1 Methods for Analyzing Gradations 50-50
2.8.2 Effect of the Restricted Zone on HMA Performance 51-51
2.9.1 Research on Fines and Fillers 52-54
2.10 Effect of Crushing Operations on Aggregate Properties 55-55
2.10.1 Types of Crushers 56-56
2.10.2 Factors Affecting Aggregate Shape 57-57
2.10.4 Influence of Shape on Performance 58-59
3.2.2 Fine Aggregate Angularity 60-61
3.2.3 Coarse Aggregate Angularity 62-62
3.3.1 Introduction 63-63
3.3.3 Sulfate Soundness 64-64
3.4.2 Aggregate Specific Gravity 65-65
3.5 Summary of Agency Specification Survey 66-66
4.3 WesTrack 67-68
4.4.1 Effect of Gradation 69-69
4.4.2 Relationship Between Aggregate Properties and Performance 70-70
4.5 Summary of Data from In-Service Pavements and Accelerated Load Facilities 71-71
5.2.1 Laboratory Evaluation 72-72
5.3.3 Field Evaluation 73-73
6.1.3 Fine Aggregate Angularity 74-74
6.4 Aggregate Production 75-75
6.5 Long-Term Pavement Studies and Accelerated Testing 76-76
References 77-84
Glossary 85-85
Appendix - NCHRP Project 9-35 Aggregate Specification Survey 86-90
Abbreviations used without definitions in TRB publications 91-91

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