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  • Handbook
    • Asphalt Paving Handbook
    • Videos
    • Figures
    • Tables
  • CHECKLISTS
  • ABBREVIATIONS
  • About
1. Introduction
  • 1.1 Handbook Purpose and Organization
  • 1.2 Airfield Paving
  • 1.3 Asphalt Mixtures Defined and Classified
  • 1.4 Workmanship
  • 1.5 Certification and Accreditation Programs
2. Project Organization
  • 2.1 Introduction
  • 2.2 Project Documents
  • 2.3 Preconstruction Conference
  • 2.4 Ongoing Communication
  • 2.5 Ongoing Records
  • 2.6 Safety
3. Asphalt Materials and Mix Design
  • 3.1 Introduction
  • 3.2 Asphalt Binder: Grading Systems And Properties
  • 3.3 Aggregate Characteristics And Properties
  • 3.4 Mixture Volumetrics
  • 3.5 Asphalt Mix Properties
  • 3.6 Additives
  • 3.7 Mix Design Procedures
  • 3.8 Laboratory Versus Plan-produced Mixes
  • 3.9 Summary
4. Mix Production
  • 4.1 Introduction
  • 4.2 Material Storage and Handling
  • 4.3 Aggregate Cold Feed
  • 4.4 Aggregate Drying and Heating
  • 4.5 Batch Plants
  • 4.6 Drum and Continuous Plants
  • 4.7 Emission-Control System
  • 4.8 Temporary Mixture Storage
  • 4.9 Weighing and Loadout
  • 4.10 Safety
  • 4.11 Troubleshooting and Checklists
5. Surface Preparation
  • 5.1 Introduction
  • 5.2 Base Preparation for New Asphalt Pavements
  • 5.3 Asphalt Surface Preparation for Asphalt Overlays
  • 5.4 PCC Surface Preparation For Asphalt Overlays
  • 5.5 Tack Coat
  • 5.6 Summary
6. Mixture Delivery
  • 6.1 Introduction
  • 6.2 Planning
  • 6.3 Truck Types
  • 6.4 Proper Truck Loading
  • 6.5 Hauling Procedures
  • 6.6 Unloading the Mix
  • 6.7 Tracking Quantities
7. Mix Placement
  • 7.1 Introduction
  • 7.2 Tractor Unit
  • 7.3 Screed Unit
  • 7.4 Grade Control
  • 7.5 Layer Thickness
  • 7.6 Establishing Paver Speed
  • 7.7 Related Paving Operations
  • 7.8 Best Practices Checklists
8. Compaction
  • 8.1 Introduction
  • 8.2 Definitions
  • 8.3 Rollers
  • 8.4 Factors Affecting Compaction
  • 8.5 Compaction Variables Under The Operator’s Control
  • 8.6 Determination of Rolling Pattern
  • 8.7 Roller Checklists
9. Joint Construction
  • 9.1 Introduction
  • 9.2 Transverse/Construction Joints
  • 9.3 Longitudinal Joints
  • 9.4 Echelon Paving and Rolling
  • 9.5 Unconventional Longitudinal Joint Methods
10. Segregation
  • 10.1 Introduction
  • 10.2 Recognizing Physical Segregation, Causes, and Solutions
  • 10.3 Four Stages Where Segregation Can Originate
  • 10.4 Thermal Segregation
  • 10.5 Confirming and Quantifying Segregation
11. Quality Assurance
  • 11.1 Introduction
  • 11.2 Definitions
  • 11.3 General Types Of Specifications
  • 11.4 Quality Control Plan
  • 11.5 Sampling Methods
  • 11.6 Quality Control At The Plant
  • 11.7 Quality Control In The Field: Placement And Compaction
  • 11.8 Acceptance
12. Mat Problems
  • 12. Mat Problems
  • 12.1 Surface Waves
  • 12.2 Tearing (Streaks)
  • 12.3 Nonuniform Texture
  • 12.4 Screed Marks
  • 12.5 Screed Responsiveness
  • 12.6 Surface (Auger) Shadows
  • 12.7 Poor Precompaction
  • 12.8 Joint Problems
  • 12.9 Checking
  • 12.10 Shoving And Rutting
  • 12.11 Bleeding And Fat Spots
  • 12.12 Roller Marks
  • 12.13 Poor Mix Compaction
  • 12.14 Other Pavement Problems
Appendix
  • AAPTP Airport Asphalt Videos

6. Mixture Delivery

6.1 INTRODUCTION

Following the production of asphalt mixtures at the asphalt plant, these materials are loaded into haul vehicles and trailers, either directly or after they have been stored for a short time in a silo or surge bin. The goal of this stage of the paving process is to provide a steady, regularly spaced, uninterrupted supply of consistent, homogeneous materials. Accomplishing this goal helps to ensure that the paver can proceed at a constant speed for the entirety of the paving day. Experience has shown that a paver operating at a constant speed without stops produces the smoothest and longest-lasting pavement.

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