16 th Annual ICAR Symposium Session C1: DOT/Federal Agency Panelists

1. 16th Annual ICAR SymposiumSession C1: DOT/Federal Agency Panelists Aggregate Issues in Oklahoma Kenneth Ray Hobson, P.E. QA Engineer – Materials Division May 14, 2008

2. Outline • Materials Division Web Site • 5 Step Review of Aggregate Information • Aggregate Base Research • AIMS Research • Micro-Deval Usage

3. Materials DivisionWeb Site Navigationfor Aggregate Information • Step 1: Navigate to the Materials Web Site

4. http://odot.org/materials

5. Materials DivisionWeb Site Navigationfor Aggregate Information • Step 1: Navigate to the Materials Web Site • Step 2: Navigate to Materials & Testing

9. http://odot.org /materials /materials.htm

10. Materials DivisionWeb Site Navigationfor Aggregate Information • Step 1: Navigate to the Materials Web Site • Step 2: Navigate to Materials & Testing • Step 3: View Approved Aggregate Materials

12. APL

13. ALL

15. Materials DivisionWeb Site Navigationfor Aggregate Information • Step 1: Navigate to the Materials Web Site • Step 2: Navigate to Materials & Testing • Step 3: View Approved Aggregate Materials • Step 4: View Aggregate Test Data

16. Test Data

18. Coarse Aggregate

19. Coarse Agg. Data

21. Materials DivisionWeb Site Navigationfor Aggregate Information • Step 1: Navigate to the Materials Web Site • Step 2: Navigate to Materials & Testing • Step 3: View Approved Aggregate Materials • Step 4: View Aggregate Test Data • Step 5: Aggregate Specifications

24. Bases

25. 303

27. Materials

28. 703

32. Aggregate Base Research • Team with ODOT, Contractors and Academia (OTI) • Design New Gradation • Require High Permeability • Producible • Field Test Project • Control Sections • Geotextiles • Various Gradations (new and existing) • Test at Various Stages • Constructed at the University of Oklahoma

33. AIMS Research • Researchers at the University of Oklahoma • Dr. Zaman, Dr. Laguros and Ashish Gupta • Coarse Aggregate • Quantify: 3-d Shape, Angularity and Texture • Sizes 4.75 - 37.5 mm • Fine Aggregate • Quantify: 3-d Shape and Angularity • Sizes 4.75 – 0.15 mm

39. Micro-Deval Usage • Adopted in 2003 by Special Provision for HMA • Max Loss of 25 for 30 Million ESALs • Paper and Field Performance Reviewed to set Specification • In-House Research Varied Temperature, Loading and Gradation • Change is not Easily Accepted • AASHTO Standard to be Revised

40. Thank you! khobson@odot.org