DYNAMIC AND RESILIENT MODULUS OF MN/DOT ASPHALT MIXTURES
This report presents the results of laboratory testing to determine the complex modulus and phase angle of asphalt mixtures. Laboratory tests were performed on four different asphalt mixtures from the Mn/ROAD site. Testing was performed at six temperatures and five frequencies. Data from the tests were processed through a nonlinear regression curve fit to generate master curves of dynamic modulus and phase angle vs. frequency. These master curves were compared to results obtained from Witczak's predictive equations. It was found, as expected, that the dynamic modulus increased with an increase in frequency and a decrease in temperature. The model used to fit dynamic modulus master curves provided a good fit for the experimental data. The modulus values calculated using the 2000 predictive equation fit the test data reasonably well for Cell 21 and 35 mixtures, but the differences for Cells 33 and 34 were more significant. Smooth master curves for phase angle could not be obtained. An exploratory study to use a vibration exciter to measure dynamic modulus proved unsuccessful. This study was done under the framework of NCHRP Projects 1-37A, 9-19, and 9-29 that recommends dynamic modulus both as a design parameter and a simple performance test.
- Record URL:
-
-
Corporate Authors:
University of Minnesota, Twin Cities
Department of Civil Engineering, 500 Pillsbury Drive, SE
Minneapolis, MN United States 55455Minnesota Department of Transportation
Office of Research Services, 395 John Ireland Boulevard
St Paul, MN United States 55155 -
Authors:
- Clyne, T R
- Li, Xiaopeng (Shaw)
-
0000-0002-5264-3775
- MARASTEANU, M O
- Skok, E L
- Publication Date: 2003-2
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: 78 p.
Subject/Index Terms
- TRT Terms: Asphalt mixtures; Dynamic modulus of elasticity; Laboratory tests; Modulus of resilience; Pavement design; Temperature
- Identifier Terms: Minnesota Department of Transportation
- Uncontrolled Terms: Master curve; Phase angle
- Geographic Terms: Minnesota
- Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 00967183
- Record Type: Publication
- Report/Paper Numbers: MN/RC-2003-09,, Final Report
- Contract Numbers: Contract No. 81655
- Files: TRIS, STATEDOT
- Created Date: Dec 21 2003 12:00AM