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

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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

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Outline

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

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Materials DivisionWeb Site Navigationfor
Aggregate Information

• Step 1 Navigate to the Materials Web Site

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http//odot.org/materials
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Materials DivisionWeb Site Navigationfor
Aggregate Information

• Step 1 Navigate to the Materials Web Site
• Step 2 Navigate to Materials Testing

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http//odot.org /materials /materials.htm
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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

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APL
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ALL
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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

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Test Data
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Coarse Aggregate
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Coarse Agg. Data
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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

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Bases
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303
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Materials
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703
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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

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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

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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

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Thank you!
khobson_at_odot.org