Hot Mix Asphalt (HMA) Characterization for the 2002 AASHTO Design Guide
Record Type: DOT
MDOT currently uses the AASHTO Guide for the Design of Pavement Structures for structural pavement design. This guide is empirically based and utilizes the concept of structural numbers (SN) to determine the overall required thickness of varying pavement layers. These structural numbers were determined from the AASHTO road test in the 1950’s. Currently the AASHTO 2002 Guide for Design of New and Rehabilitated Pavement Structures is being developed. This guide will have three design levels (Level 1,2 and 3) all based on mechanistic-empirical design principles and will potentially replace the existing guide as the structural design guide for MDOT. The researchers working on the flexible pavement component of the 2002 guide have evaluated many test methods to determine the best relationship between observed HMA mix lab performance and field performance with respect to rutting, fatigue cracking, etc. Currently, the dynamic modulus test will be used to characterize HMA mixes for input into the 2002 design guide. The test is run in accordance with ASTM D 3497 Standard Test Method for Dynamic Modulus of Asphalt Concrete Mixtures. Mississippi HMA mixes need to be characterized using dynamic modulus testing in preparation for the future implementation of the 2002 design guide. In this study a range of HMA mixes will be characterized using the dynamic modulus testing. Any proposed evaluation will initially be focused on materials and mixes that are currently being used in the state. Selected mixes will also be evaluated using the asphalt pavement analyzer (APA) and confined repeated deformation testing for comparison purposes. MDOT has performed APA testing on many mixes and a side-by-side comparison of the dynamic modulus and the APA would be very useful.
Start date: 2002/10/1
Status: Active
Contract/Grant Number: State Study No. 166
Total Dollars: 110000
Source Organization: Mississippi Department of Transportation
Date Added: 12/16/2002
Index Terms: Hot mix paving mixtures, Asphalt, Asphalt pavements, Pavement design, Structural analysis, Mixtures, Design, Guidelines, Research projects, American Association of State Highway and Transp Officials,
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Mississippi Department of Transportation
http://www.mdot.state.ms.us/
P.O. Box 1850, 500 North West Street
Jackson, MS 39215-1850
USA
Federal Highway Administration
http://www.fhwa.dot.gov/
1200 New Jersey Avenue, SE
Washington, DC 20590
USA
Phone: (202) 366-4000
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Barstis, William F.
Phone: (601) 359-7650
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Mississippi Department of Transportation
http://www.mdot.state.ms.us/
P.O. Box 1850, 500 North West Street
Jackson, MS 39215-1850
USA
Mississippi State University, Mississippi State
Department of Industrial and Systems Engineering
P.O. Box 9542
Mississippi State, MS 39762
USA
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Buchanan, Shane
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