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Raw Materials Study at Chicago O’Hare Int’l Airport
by
Francis B. Nelson III
Leslie J. Struble
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Overview
• Material Suppliers
• IDOT Testing
• Freeze-Thaw (F/T) Performance
• Alkali Silica Reaction (ASR) Information
• Shrinkage*
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Material Suppliers
• Sources identified for:– Coarse Aggregate– Fine Aggregate– Cement– Mineral Admixtures
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IDOT Approved Materials
• IDOT has developed lists of Approved Material Suppliers
• Lists updated constantly
• Based on extensive testing programs
• Available online– http://www.dot.state.il.us/materials/materialslist.html
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Rod R. Blagojevich,
Governor
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Features
ILLINOIS DEPARTMENT OF TRANSPORTATION APPROVED LISTS FOR MATERIALS
Refer to Section 106 of the Standard Specifications for Road and Bridge Construction for requirements relating to the "CONTROL OF MATERIALS". The Bureau of Materials and Physical Research maintains an approved list of producers/suppliers of materials which meet Department specifications.
The companies shown on the approved lists contained herein may provide their products to Department projects according to the applicable specification and/or Policy Memorandum. Although approved for use, any of these materials are subject to inspection, test or rejection at any time (Article 106.03). These lists will be updated on an as-needed basis.
To view or print these lists you will need to have Adobe Reader installed on your computer. Click on the link below to install Adobe Reader. For further instructions on downloading visit the Tips and Tools Page.
To automatically receive updated approved materials lists by e-mail, please click here.
Current Approved Materials List
Date Updated
Approved List Name
01/28/05 Index
10/29/04 Aggregate Freeze Thaw Rating
08/13/04 Air-Entraining Admixtures for Controlled Low-Strength Material
11/19/04 Approved Aggregate Sources Agricultural Limestone Booklet
01/14/05 Asphalt Release Agents for Vehicles Transporting Bituminous Mixtures
01/07/05 Bridge Deck Thin Polymer Overlay Systems
10/29/04 Bridge Seat Sealers
01/21/05 Certified Precast Concrete Producers Download example photographs: precastconcretephotos.pdf
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IDOT Testing
• Every supplier is tested by IDOT
• Tests constantly updated
• Only IDOT tests allowed
• Approval Process available from IDOT
• Majority of producers only use IDOT approved materials near Chicago
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Gradations Tech Note
• IDOT Art. 1004 vs. ASTM C33
CA 5 / ASTM 357
0
10
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1 1/213/41/23/8No. 4
Sieves (in)
Pe
rce
nt
Pa
ss
ing
(%
)
CA 5 357
CA 7 / ASTM 57
0
10
20
30
40
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1 1/213/41/23/8No. 4
Sieves (in)
Pe
rce
nt
Pa
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(%
)
CA 7 57
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Freeze-Thaw Performance
• Met with IDOT to discuss their experience– Determined that their F/T rating list of
approved suppliers is best suited for this project
– IDOT has extensive testing program in place for quarries to be approved
– Use the 40 Year Extended Life Pavement Design List
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F/T Testing Program
• Each quarry tested bi-annually
• 5 Samples run for 350 cycles
• CA for concrete must be of quality A
• Prior to F/T Testing IDOT tests for:– Soundness– Los Angeles Abrasion– Minus #200 sieve material– Maximum % Deleterious Material
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Quality A Standards
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Top Size Allowable
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Additional F/T Testing
• If larger top sized gradations are deemed beneficial
• Coordinate with IDOT to test for larger sizes
• Currently use 0.025” expansion for 40 year Design Life List Approval
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ASR Information
• Good performance in Chicago area
• IDOT has provided:– Preliminary specification– List of approved fine aggregate suppliers
• UIUC has extensive experience with ASR
• Samples will be obtained to do testing in our lab– Compare natural sand vs. manufactured sand
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Drying Shrinkage
• Study will be performed on different top size aggregate gradations– CA’s 5, 7, 11, & 14– Along with a blend of CA 1 & 7
• Additional Study to test different cements– Future work
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Thank You
Any questions/comments?