1. History of Mn/DOT HMA Mixture Design & Construction Significant Changes By: Dave Holt, Dick Ingberg, and Earl Angell

2. 1950’s Transition from Road-Mix to Hot-Mix Density Control

3. Roadmix

4. HMA Plant

5. Hveem Compactor & Heavy Pnuematic Roller

6. 1960’s Elimination of Hot Screening Mix Design for Surface Coarse Thin HMA Overlays/Plant-Mix Seals

7. Screen Deck & Drum-Mix Plants

9. CWA Test

10. Thin Overlay

11. 1970’s Oil Embargo Drum-Mix Plants Hot-mix Recycle Full-Depth HMA Design

12. Avg. AC Bid Price, by Mn/DOT

13. Black Base Consumption, by Mn/DOT

14. HMA Recycling

17. 1980’s Q/M (Quality Management) Volumetric Training

18. Training & Voids Testing

19. 1990’s Certified Technicians VMA & Moisture Susceptibility SuperPave

20. Technicians Certified per Year

21. Immersion/Compression Test Superpave Gyratory Compactor

22. 2000’s Warranties Design/Build