Comparative Analysis of Idaho and Micro-Deval Aggregate Degradation Test Methods
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 1
Abstract
In the United States, several states have adopted the Micro-Deval test (MDT) method for evaluating degradation characteristics of aggregates used in road construction. This paper compares MDT aggregate degradation data to those obtained by the Idaho degradation test (IDT) method. Simple linear regression analyses were performed on the aggregate degradation data with the resulting coefficient of determination, , values of 0.70 and 0.67 for IDT versus MDT for coarse aggregate and IDT versus MDT for fine aggregate, respectively. Additional models considered are (1) a weighted combination method that relies on the judgment of the engineer and (2) a multivariate regression analysis that does not involve weighting factors. In all the analyses considered, the multivariate regression had the largest value of 0.75. Numerical examples showing correlations between MDT and IDT loss values are presented, followed by conclusions. Analyses used in this project may be of practical use to other state departments of transportation when adopting a new aggregate degradation test method and performing calibration with an existing test method.
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Acknowledgments
The work presented in this paper was funded by the Idaho Transportation Department. Any opinions, findings, and conclusions or recommendations are those of the authors.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 1 • January 2014
Pages: 198 - 201
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 25, 2012
Accepted: Jan 2, 2013
Published online: Jan 4, 2013
Discussion open until: Jun 4, 2013
Published in print: Jan 1, 2014
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