NCHRP Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary
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NCHRP Report 673:
A Manual for Design of Hot-Mix Asphalt with Commentary
(2011)
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Overview

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Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary incorporates the many advances in materials characterization and hot-mix asphalt (HMA) mix design technology developed since the conclusion of the Strategic Highway Research Program (SHRP).

The final report on the project that developed NCHRP Report 673 and Appendixes C through F to NCHRP Report 673 were published as NCHRP Web-Only Document 159. The titles of the appendixes are as follows:

• Appendix C: Course Manual

• Appendix D: Draft Specification for Volumetric Mix Design of Dense-Graded HMA

• Appendix E: Draft Practice for Volumetric Mix Design of Dense-Graded HMA

• Appendix F: Tutorial

The companion Excel spreadsheet HMA tool and the training course materials described in NCHRP Report 673 are available for download from the Internet.

In January 2012, TRB released NCHRP Report 714: Special Mixture Design Considerations and Methods for Warm Mix Asphalt: A Supplement to NCHRP Report 673: A Manual for Design of Hot Mix Asphalt with Commentary. The report presents special mixture design considerations and methods used with warm mix asphalt.

In January 2012, TRB released an errata to NCHRP Report 673: Page 41, Table 4-7, and page 123, Table 8-10, respectively, should be replaced with a new table.

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Publication Info

285 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-xi
Chapter 1 - Introduction 1-3
Materials Used in Making Asphalt Concrete 4-4
Asphalt Concrete Pavements 5-6
How Asphalt Concrete Pavements Fail 7-9
Asphalt Concrete Mixtures 10-11
HMA Mix Design Methods 12-14
Chapter 3 - Asphalt Binders 15-16
Performance Grading - Test Methods 17-21
Performance Grading - Specification 22-23
Critical Temperatures, Specification Values, and Reliability 24-25
Practical Selection of PG Binder Grades for HMA Mix Design 26-27
Aggregate Particle Size Distribution 28-32
Aggregate Specific Gravity and Absorption 33-37
Aggregate Specification Properties 38-42
Source Aggregate Properties 43-45
Composition Factors 46-52
Mixture-Specific Gravity 53-55
Volumetric Analysis 56-64
Chapter 6 - Evaluating the Performance of Asphalt Concrete Mixtures 65-65
Mixture Composition and Performance 66-70
Laboratory Testing 71-81
Performance Predictions Using the AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) 82-90
Pavement Structure and Construction 91-94
Important Factors in Mix Selection 95-97
Recommended Mix Types 98-100
Other Mix Design Methods 101-105
Overview of Design Method 106-106
Step 1. Gather Information 107-107
Step 2. Select Asphalt Binder 108-110
Step 4. Select Nominal Maximum Aggregate Size 111-111
Step 5. Determine Target VMA and Design Air Void Content 112-113
Step 8. Proportion Aggregates for Trial Mixtures 114-123
Step 9. Calculate Trial Mix Proportions by Weight and Check Dust/Binder Ratio 124-127
Step 10. Evaluate and Refine Trial Mixtures 128-144
Step 11. Compile Mix Design Report 145-147
General Mixture Design Considerations for RAP 148-149
Overview of the Mixture Design Process with RAP 150-150
Using HMA Tools to Design HMA Mixes with RAP 151-151
RAP Sampling 152-152
Blending and Variability 153-160
RAP Aggregate Properties 161-163
RAP Binder Properties 164-169
Handling RAP Materials in the Laboratory 170-173
Overview of GGHMA Mix Design Procedure 174-175
Step 1 - Materials Selection 176-178
Step 2 - Trial Gradations 179-187
Step 3 - Selection of Optimum Gradation 188-188
Step 5 - Conduct Performance Testing 189-190
Trouble Shooting GGHMA Mix Designs 191-193
Chapter 11 - Design of Open-Graded Mixtures 194-194
Step 1 - OGFC Materials Selection 195-197
Step 2 - Trial Gradations 198-202
Step 4 - Selection of Optimum Asphalt Binder Content 203-204
Trouble Shooting PFC Mix Designs 205-206
Adjusting Laboratory HMA Mix Designs for Plant Production 207-210
Quality Control of HMA 211-224
Commentary to the Mix Design Manual for Hot Mix Asphalt 225-225
Chapter 1 - Introduction 226-226
Chapter 2 - Background 227-227
Chapter 3 - Asphalt Binders 228-228
Chapter 4 - Aggregates 229-230
Chapter 5 - Mixture Volumetric Composition 231-231
Chapter 6 - Evaluating the Performance of Asphalt Concrete Mixtures 232-239
Chapter 7 - Selection of Asphalt Concrete Mix Type 240-240
Chapter 8 - Design of Dense-Graded HMA Mixtures 241-252
Chapter 9 - Reclaimed Asphalt Pavement 253-264
Chapter 10 - Design of Gap-Graded HMA Mixtures 265-265
Chapter 11 - Design of Open-Graded Mixtures 266-266
Chapter 12 - Field Adjustments and Quality Assurance of HMA Mixtures 267-270
References 271-273
Abbreviations used without definitions in TRB publications 274-274

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