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1616thth Annual ICAR Symposium Annual ICAR SymposiumSession C1: DOT/Federal Agency Session C1: DOT/Federal Agency
PanelistsPanelists
Aggregate Issues in OklahomaAggregate Issues in OklahomaKenneth Ray Hobson, P.E.Kenneth Ray Hobson, P.E.QA Engineer – Materials QA Engineer – Materials
DivisionDivisionMay 14, 2008May 14, 2008
OutlineOutline
• Materials Division Web Site Materials Division Web Site – 5 Step Review of Aggregate Information5 Step Review of Aggregate Information
• Aggregate Base Research Aggregate Base Research
• AIMS ResearchAIMS Research
• Micro-Deval UsageMicro-Deval Usage
Materials DivisionMaterials DivisionWeb Site NavigationWeb Site Navigation
for Aggregate Informationfor Aggregate Information
• Step 1: Navigate to the Materials Web Step 1: Navigate to the Materials Web SiteSite
http://odot.org/materials
Materials DivisionMaterials DivisionWeb Site NavigationWeb Site Navigation
for Aggregate Informationfor Aggregate Information
• Step 1: Navigate to the Materials Web Step 1: Navigate to the Materials Web SiteSite
• Step 2: Navigate to Materials & TestingStep 2: Navigate to Materials & Testing
http://odot.org/materials
/materials.htm
Materials DivisionMaterials DivisionWeb Site NavigationWeb Site Navigation
for Aggregate Informationfor Aggregate Information
• Step 1: Navigate to the Materials Web Step 1: Navigate to the Materials Web SiteSite
• Step 2: Navigate to Materials & TestingStep 2: Navigate to Materials & Testing
• Step 3: View Approved Aggregate Step 3: View Approved Aggregate MaterialsMaterials
APL
ALL
Materials DivisionMaterials DivisionWeb Site NavigationWeb Site Navigation
for Aggregate Informationfor Aggregate Information
• Step 1: Navigate to the Materials Web Step 1: Navigate to the Materials Web SiteSite
• Step 2: Navigate to Materials & TestingStep 2: Navigate to Materials & Testing
• Step 3: View Approved Aggregate Step 3: View Approved Aggregate MaterialsMaterials
• Step 4: View Aggregate Test DataStep 4: View Aggregate Test Data
Test Data
Coarse Aggregate
Coarse Agg. Data
Materials DivisionMaterials DivisionWeb Site NavigationWeb Site Navigation
for Aggregate Informationfor Aggregate Information
• Step 1: Navigate to the Materials Web Step 1: Navigate to the Materials Web SiteSite
• Step 2: Navigate to Materials & TestingStep 2: Navigate to Materials & Testing
• Step 3: View Approved Aggregate Step 3: View Approved Aggregate MaterialsMaterials
• Step 4: View Aggregate Test DataStep 4: View Aggregate Test Data
• Step 5: Aggregate SpecificationsStep 5: Aggregate Specifications
Bases
303
Materials
703
Aggregate Base ResearchAggregate Base Research
• Team with ODOT, Contractors and Academia (OTI)Team with ODOT, Contractors and Academia (OTI)• Design New GradationDesign New Gradation
– Require High PermeabilityRequire High Permeability– Producible Producible
• Field Test ProjectField Test Project– Control SectionsControl Sections– GeotextilesGeotextiles– Various Gradations (new and existing)Various Gradations (new and existing)– Test at Various Stages Test at Various Stages
• Constructed at the University of OklahomaConstructed at the University of Oklahoma
AIMS ResearchAIMS Research
• Researchers at the University of OklahomaResearchers at the University of Oklahoma– Dr. Zaman, Dr. Laguros and Ashish GuptaDr. Zaman, Dr. Laguros and Ashish Gupta
• Coarse AggregateCoarse Aggregate– Quantify: 3-d Shape, Angularity and TextureQuantify: 3-d Shape, Angularity and Texture– Sizes 4.75 - 37.5 mmSizes 4.75 - 37.5 mm
• Fine AggregateFine Aggregate– Quantify: 3-d Shape and AngularityQuantify: 3-d Shape and Angularity– Sizes 4.75 – 0.15 mmSizes 4.75 – 0.15 mm
Micro-Deval UsageMicro-Deval Usage
• Adopted in 2003 by Special Provision for HMAAdopted in 2003 by Special Provision for HMA– Max Loss of 25 for 30 Million ESALsMax Loss of 25 for 30 Million ESALs
• Paper and Field Performance Reviewed to set Paper and Field Performance Reviewed to set SpecificationSpecification– In-House Research Varied Temperature, In-House Research Varied Temperature,
Loading and GradationLoading and Gradation• Change is not Easily AcceptedChange is not Easily Accepted• AASHTO Standard to be RevisedAASHTO Standard to be Revised
