MIX DESIGN SCHOOL DAY 1. Time Topic Presenter

Transcription

1 DAY 1 1:00 Welcome (PP) History and Background of Superpave Program SHRP History Selection of Materials Aggregate Testing Performance grading of binders Gyratory method of compaction vs marshall method Roles and Responsibilities VDOT Contactor Code of Conduct MITS/PLAID Database Overview of Class Laboratory Safety 2:15 Textbook Review (Text) Specifications (VDOT vs Federal) Test Methods 2:30 Superpave in Virginia (PP) History where we have been and where we are headed 2:45 Break Rob Crandol, VDOT Trenton Clark Virginia Asphalt Trenton Clark Virginia Asphalt 3:00 Aggregate Consensus Properties (PP) Aggregate sources in Virginia and outside of Virginia Aggregate selection and consensus properties Gradation blending Specific Gravities Bulk specific gravity Effective specific gravity Apparent specific gravity Absorption Course aggregate angularity 4:30 Specification Hunt Find Specifications (Text) Angela Beyke, VDOT 5:00 Day 1 Review and Wrap-up / Adjourn All *Class to begin after lunch, no lab portion on first day

2 DAY 2 8:00 Lab Safety Overview (PP) 8:15 Laboratory Demonstration (Lab) RAP Specific gravity Unit weight cylinder calibration 10:30 Aggregate Property Calculations (WB, WS) Unit weight cylinder calibration NOON Lunch 1:15 Aggregate Property Calculations Continued (WB, WS) Unit weight cylinder calibration 2:00 Blending Aggregate Consensus Properties (PP) 2:15 Break

3 DAY 2 (Continued) PRELIMINARY AGENDA 2:30 Blending Aggregate Consensus Properties (WB, WS) 4:30 Binder Properties and Binder Selection (PP) Angela Beyke, VDOT ESALs Defined Abson recovery Effects of RAP Rule of 90 5:00 Day 2 Review and Wrap-up / Adjourn All

4 DAY 3 8:00 Design Aggregate Structure (PP) Power of 45 Developing and interpreting Trial blend asphalt content Asphalt batching calculations (RAP vs virgin designs) Batching requirements Laboratory safety during batching and asphalt handling 9:00 Asphalt Laboratory Demonstration (Lab) Proper sampling and batching for mix design Mixing and conditioning requirements Gyratory compaction 10:45 Break 11:00 Determination of Volumetric Properties (PP) Defining of all volumetric properties and impacts on design VTM, VMA, VFA, %Gmm of Ni, % Pbe, F/A Gse and Gsb (Correction factor) NOON Lunch 1:15 Trial Blend Volumetric Property Calculations (WS, WB) VTM, VMA, VFA, %Gmm of Ni, % Pbe, F/A Gse and Gsb (Correction factor) 2:30 Break 2:45 Estimating Trial Blend Volumetric Properties (PP) Delta calculations (VTM, VMA, Pb) Estimated asphalt content, VMA, VFA, 5Gmm Ni 3:00 Estimating Trial Blend Volumetric Properties (WS, WB) Delta calculations (VTM, VMA, Pb) Estimated asphalt content, VMA, VFA, 5Gmm Ni 4:00 Selection of Design Trial Blend and Varying AC Analysis (PP) 5:00 Day 3 Review and Wrap-up / Adjourn All

5 DAY 4 8:00 Permeability, TSR s and Oven Calibrations (CL) Mike Dudley, Virginia Asphalt 9:00 Laboratory Demonstration (Lab) Permeability Tensile strength ratio Muffle furnace calibration Unit weight Mike Dudley, Virginia Asphalt 10:30 Break 10:45 Putting It All Together Mix Design Submittal (PP) VDOT Requirements Common mistakes 11:45 Lunch 1:00 SMA and Specialty Mix Designs (PP) SMA OGFC and OGDC SM :30 Break 2:45 Asphalt Mix Design and Trouble Shooting (Materials Packet) Plant Troubleshooting Gradation Volumetric Field Troubleshooting Density Tenderness Workability 4:15 Specification Review Angela Beyke, VDOT 5:00 Day 4 Review and Wrap-up / Adjourn All *Mix design to be included as handout or as part of text *Asphalt Mix Design Troubleshooting to include a Materials Packet **CL-Classroom, WS Work Sheet, WB White Board, PP Power Point

6 DAY 5 8:00 Review All 9:45 Break 10:00 2:00 Examination