Investigation of Aggregate Shape Effects on Hot Mix Performance Using An Image Analysis Approach

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General Information
Study Number: TPF-5(023)
Lead Organization: Federal Highway Administration
Contract Start Date: Feb 28, 2002
Solicitation Number: 15
Partners: AL, FHWA, GADOT, IN, MI, MO, MT, SC
Contractor(s): University of Illinois
Status: Closed
Est. Completion Date:
Contract/Other Number:
Last Updated: May 12, 2014
Contract End Date: Feb 28, 2005
Financial Summary
Contract Amount: $0.00
Total Commitments Received:
100% SP&R Approval: Approved
Contact Information
Lead Study Contact(s): Pal Choudry
FHWA Technical Liaison(s): John D'Angelo
john.d'angelo@fhwa.dot.gov
Phone: 202-366-0121
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
Alabama Department of Transportation 2002 $0.00
Federal Highway Administration 2002 $0.00
Georgia Department of Transportation 2002 $0.00
Indiana Department of Transportation 2002 $0.00
Michigan Department of Transportation 2002 $0.00
Missouri Department of Transportation 2002 $0.00
Montana Department of Transportation 2002 $0.00
South Carolina Department of Transportation 2002 $0.00

Objectives

The measurement of imaging-based volumetric and morphological indices and their correlation with laboratory and field performance results is a wave of the future in the development of asphalt pavement science and technology. A University of Illinois Aggregate Image Analyzer has been developed and is ready for validation. This proposal makes strong efforts to develop parameters that may be used to supplant in speed, cost, objectivity, and precision/accuracy of the traditional test procedures used to characterize aggregate shape/volume characteristics.

Comments

The study began in March 2002. It consisted of 2 main phases. In Phase I, coarse aggregate shape, size, angularity and texture properties were evaluated to define proper imaging based morphological indices. The University of Illinois Aggregate Image Analyzer (UI-AIA) was used for the evaluation. The aggregates that were evaluated included: (1) Samples received from the National Center for Asphalt Technology (NCAT) Pavement Test Track study and (2) representative aggregate samples from the participating states and the Centeral Federal Lands and Highways Division.

In Phase (II) of the study, representative samples received from the participating states were used to prepare asphalt concrete samples in SuperPave gyratory compacter. The samples were then tested for modular and permanent deformation characteristics. Stability and performance of the mixes were determined at the Advanced Research and Engineering Laboratory (ATREL) of the University of Illinois. The intent was to form a laboratory database for studying the influence of particle shape on asphalt concrete mix performance and also to establish proper aggregate criteria. In addition, NCAT test track data were collected for various field mixes for which detailed aggregate shape property indices were developed from Phase (I). Both the laboratory and field data are currently being analyzed for better understanding of aggregate effects on asphalt concrete mixture performance.

The laboratory work is expected to be completed by November 2003 and preparation for final report will begin.

The entire project is expected to be completed by March 2004.

Subjects: Materials and Construction

Documents Attached
Title File/Link Type Privacy Download
Investigation of Aggregate Shape Effects on Hot Mix Performance Using an Image Analysis Approach final_report.pdf Final Report Public
Official Closeout Memo TPF-5(023) -- Close out Memo - Electronic Signature.pdf Memorandum Public
December 2 , 2002 - April 2, 2003 quarterly_report_04-03.pdf Quarterly Progress Report Public
June 2, 2002 - August 2, 2002 quarterly_report_08-02.pdf Quarterly Progress Report Public
August 2, 2003 - August 20, 2003 quarterly_report_08-03.pdf Quarterly Progress Report Public
June 2002 quarterly_report_06-02.pdf Quarterly Progress Report Public

Investigation of Aggregate Shape Effects on Hot Mix Performance Using An Image Analysis Approach

General Information
Study Number: TPF-5(023)
Lead Organization: Federal Highway Administration
Contract Start Date: Feb 28, 2002
Solicitation Number: 15
Partners: AL, FHWA, GADOT, IN, MI, MO, MT, SC
Contractor(s): University of Illinois
Status: Closed
Est. Completion Date:
Contract/Other Number:
Last Updated: May 12, 2014
Contract End Date: Feb 28, 2005
Financial Summary
Contract Amount: $0.00
Total Commitments Received:
100% SP&R Approval:
Contact Information
Lead Study Contact(s): Pal Choudry
FHWA Technical Liaison(s): John D'Angelo
john.d'angelo@fhwa.dot.gov
Phone: 202-366-0121
Commitments by Organizations
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
Alabama Department of Transportation 2002 $0.00
Federal Highway Administration 2002 $0.00
Georgia Department of Transportation 2002 $0.00
Indiana Department of Transportation 2002 $0.00
Michigan Department of Transportation 2002 $0.00
Missouri Department of Transportation 2002 $0.00
Montana Department of Transportation 2002 $0.00
South Carolina Department of Transportation 2002 $0.00

Study Description

Objectives

The measurement of imaging-based volumetric and morphological indices and their correlation with laboratory and field performance results is a wave of the future in the development of asphalt pavement science and technology. A University of Illinois Aggregate Image Analyzer has been developed and is ready for validation. This proposal makes strong efforts to develop parameters that may be used to supplant in speed, cost, objectivity, and precision/accuracy of the traditional test procedures used to characterize aggregate shape/volume characteristics.

Comments

The study began in March 2002. It consisted of 2 main phases. In Phase I, coarse aggregate shape, size, angularity and texture properties were evaluated to define proper imaging based morphological indices. The University of Illinois Aggregate Image Analyzer (UI-AIA) was used for the evaluation. The aggregates that were evaluated included: (1) Samples received from the National Center for Asphalt Technology (NCAT) Pavement Test Track study and (2) representative aggregate samples from the participating states and the Centeral Federal Lands and Highways Division.

In Phase (II) of the study, representative samples received from the participating states were used to prepare asphalt concrete samples in SuperPave gyratory compacter. The samples were then tested for modular and permanent deformation characteristics. Stability and performance of the mixes were determined at the Advanced Research and Engineering Laboratory (ATREL) of the University of Illinois. The intent was to form a laboratory database for studying the influence of particle shape on asphalt concrete mix performance and also to establish proper aggregate criteria. In addition, NCAT test track data were collected for various field mixes for which detailed aggregate shape property indices were developed from Phase (I). Both the laboratory and field data are currently being analyzed for better understanding of aggregate effects on asphalt concrete mixture performance.

The laboratory work is expected to be completed by November 2003 and preparation for final report will begin.

The entire project is expected to be completed by March 2004.

Subjects: Materials and Construction

Title File/Link Type Private
Investigation of Aggregate Shape Effects on Hot Mix Performance Using an Image Analysis Approach final_report.pdf Final Report Public
Official Closeout Memo TPF-5(023) -- Close out Memo - Electronic Signature.pdf Memorandum Public
December 2 , 2002 - April 2, 2003 quarterly_report_04-03.pdf Quarterly Progress Report Public
June 2, 2002 - August 2, 2002 quarterly_report_08-02.pdf Quarterly Progress Report Public
August 2, 2003 - August 20, 2003 quarterly_report_08-03.pdf Quarterly Progress Report Public
June 2002 quarterly_report_06-02.pdf Quarterly Progress Report Public

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