Automated measurement of aggregate indices of shape

Wilson, J. D.; Klotz, L. D.; Nagaraj, C.

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Automated measurement of aggregate indices of shape

1995-12-01
By Wilson, J. D. ; Klotz, L. D. ; Nagaraj, C.

File Language:

English

[PDF - 14.11 MB]

Details

Creators:

Wilson, J. D. ; Klotz, L. D. ; Nagaraj, C.
Corporate Creators:

University of Arkansas at Little Rock
Corporate Contributors:

United States. Federal Highway Administration. Office of Safety and Traffic Operations Research and Development
Subject/TRT Terms:
Publication/ Report Number:

FHWA-RD-95-116;3H2d3027
Resource Type:

Tech Report
Geographical Coverage:

United States
Contracting Officer:

Woo, Dah-Cheng
Corporate Publisher:

Turner-Fairbank Highway Research Center
Abstract:

Aggregate angularity is a significant factor in determining pavement resistance to rutting. Determination of aggregate angularity by direct means allows a more meaningful study of the mechanisms of pavement deformation. However, direct techniques have not been developed sufficiently to allow a more advanced study of angularity effects on pavement. Utilizing modern digital imaging hardware and image analysis techniques, this project produced an automated system for measuring aggregate angularity. Combining high resolution video, image capture hardware, sample transport, and computerized analysis, an instrument was constructed and used to compare various aggregate samples. Differentiation of known good quality aggregate from poorer grades was possible. Shape indices were developed from basic linear measurements, and the Hough Transform technique. These indices appear to have value in quantifying aggregate shape, and enable the study of mechanisms of pavement deformation, and possibly the prediction of pavement longevity.
Format:

PDF
Funding:

DTFH61-93-X-00034
Download URL:

https://rosap.ntl.bts.gov/view/dot/716/dot_716_DS1.pdf
File Type:

[PDF - 14.11 MB]
Collection(s):

Federal Highway Administration
Main Document Checksum:

urn:sha-512:aa857110bef331e410a5d6c8ca97dfc0d04f3a7f2fa46ab3b6a9417f4e2cd0b94da43a0659ba83d0654781153187fc268ba8e408ff86c59f6e99686d739f509b

File Language:

English

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