NCHRP Report 648: Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt
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NCHRP Report 648:
Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt
(2010)
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Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 648: Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt explores enhanced test methods for determining laboratory mixing and compaction temperatures of modified and unmodified asphalt binders.

Topics

  • Transportation — Materials
  • Transportation — Pavements

Publication Info

157 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-ix
Summary 1-4
A Note on Units of Viscosity 5-5
Background on the Development of Mixing and Compaction Temperature Criteria 6-7
Effect of Temperature on Degradation of Asphalt Binders 8-8
Mixing and Compaction Temperatures for Modified Asphalt Binders 9-9
Survey of Current Practices for Determining Mixing and Compaction Temperatures 10-12
Zero Shear Viscosity 13-13
Shear Rate Dependency 14-14
Workability 15-15
Shear Rates During Mixing and Compaction 16-18
Summary of Key Findings from the Literature Review 19-19
Overview of the Experimental Research Plan 20-21
Organization of the Test Plan 22-22
Part 2: Mixture Tests 23-23
Binder Tests 24-29
Mixture Tests 30-30
Summary of Research Plan 31-32
Phase Angle Method 33-33
SEP Tests 34-36
Analysis of Binder Degradation 37-42
Mixture Coating Tests 43-44
Mixture Coating Tests with Incompletely Dried Aggregate 45-45
Workability Tests 46-46
Compaction Tests 47-52
Indirect Tensile Creep Compliance and Strength 53-58
Correlation of Mixing and Compaction Temperatures 59-65
Comparison of SSF and Phase Angle Methods 66-67
Validation Experiment Results and Analysis 68-71
Summary of Key Findings 72-72
Independent Validation 73-73
Training 74-75
References 76-77
Appendix A - Responses of Survey on Agency Specifications Regarding Mixing and Compaction Temperatures 78-83
Appendix B - Mix Design Data for Base Mix and Other Compaction Experiment Mixes 84-85
Appendix C - Draft AASHTO Standard for Steady Shear Flow and Phase Angle Methods 86-135
Appendix D - Statistical Analyses of the Steady Shear Flow and Phase Angle Methods 136-147
Abbreviations used without definitions in TRB publications 148-148

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