Raw Materials Study at Chicago O’Hare Int’l Airport

by

Francis B. Nelson III

Leslie J. Struble

Overview

• Material Suppliers

• IDOT Testing

• Freeze-Thaw (F/T) Performance

• Alkali Silica Reaction (ASR) Information

• Shrinkage*

Material Suppliers

• Sources identified for:– Coarse Aggregate– Fine Aggregate– Cement– Mineral Admixtures

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

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.

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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

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

Gradations Tech Note

• IDOT Art. 1004 vs. ASTM C33

CA 5 / ASTM 357

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CA 5 357

CA 7 / ASTM 57

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1 1/213/41/23/8No. 4

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CA 7 57

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

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

Quality A Standards

Top Size Allowable

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

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

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

Thank You

Any questions/comments?