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NCHRP Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary (2011)
National Cooperative Highway Research Program (NCHRP)

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Transportation Research Board. "Chapter 2 - Background." NCHRP Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary. Washington, DC: The National Academies Press, 2011.

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Page
227
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Page
227
Front Matter (R1-R11)
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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OCR for page 227
CHAPTER 2 Background This chapter of the Manual presents general background information on construction materials and flexible pavements. It is intended for engineers and technicians with little background in these subjects. The information presented is not controversial and can be found in many other references, including introductory texts on construction materials and pavements. Therefore, further sup- porting details and justification are not needed for the information given in this chapter. 227