Performance testing is an important tool to complement volumetric properties for improving asphalt pavement performance. Vermont Agency of Transportation (VTrans) began evaluating the Hamburg wheel-tracking test (HWTT) in 2015, the Illinois flexibility index test (I-FIT) in 2018, and the indirect tensile cracking test (IDEAL-CT) as another index-based test to investigate along with the I-FIT, as a step toward balanced mix design (BMD) implementation. An increase in the use of recycled materials in asphalt mixtures produced in Vermont was anticipated in their Standard Specifications for Construction. This study is an attempt in this direction. The tests were conducted on reheated plant mixtures sampled from paving projects in Vermont and the results were analyzed to (1) develop baseline rutting and cracking performance; (2) evaluate the effects of mixture properties on performance test results; (3) compare IDEAL-CT results and I-FIT results; and (4) compare performance test results with specification criteria proposed by VTrans for evaluating the rutting and cracking resistance of asphalt mixtures. Several mixture properties, viz., nominal maximum aggregate size (NMAS), binder grade, binder content, and recycled content, were found to have significant effects on mixture rutting and cracking resistance. The test results showed a direct correlation between FI and CTindex for the dataset of VTrans mixtures. The information from this research will help VTrans to achieve its goal to move beyond the use of volumetric properties for asphalt mixture design and acceptance and serve as an example for other agencies in exploring the implementation of BMD for improving asphalt pavement performance.
American Association of State Highway and Transportation Officials. AASHTO PP 105: Standard Practice for Balanced Design of Asphalt Mixtures. AASHTO, Washington, D.C., 2020.
2.
YinF.WestR.Balanced Mix Design Resource Guide. NAPA Information Series 143. National Asphalt Pavement Association (NAPA), Greenbelt, MD, 2021.
WilliamsB. A.WillisJ. R.Carter RossT.Asphalt Pavement Industry Survey on Recycled Materials and Warm-Mix Asphalt Usage: 2018. Information Series 138. National Asphalt Pavement Association (NAPA), Lanham, MD, 2019.
5.
American Association of State Highway and Transportation Officials. AASHTO R 30: Mixture Conditioning of Hot Mix Asphalt (HMA). AASHTO, Washington, D.C., 2019.
6.
HajjE. Y.AschenbrenerT. B.Nener-PlanteD.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: California Department of Transportation (Caltrans). Report No. WRSC-TR-21-02. University of Nevada, Reno, 2021.
7.
HajjE. Y.AschenbrenerT. B.Nener-PlanteD.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: Illinois Department of Transportation (IDOT). Report No. WRSC-TR-21-03. University of Nevada, Reno, 2021.
8.
HajjE. Y.AschenbrenerT. B.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: Louisiana Department of Transportation & Development (LaDOTD). Report No. WRSC-TR-21-04. University of Nevada, Reno, 2021.
9.
HajjE. Y.AschenbrenerT. B.Nener-PlanteD.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: Maine Department of Transportation (MaineDOT). Report No. WRSC-TR-21-05. University of Nevada, Reno, 2021.
10.
HajjE. Y.AschenbrenerT. B.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: New Jersey Department of Transportation (NJDOT). Report No. WRSC-TR-21-06. University of Nevada, Reno, 2021.
11.
HajjE. Y.AschenbrenerT. B.Nener-PlanteD.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: Texas Department of Transportation (TxDOT). Report No. WRSC-TR-21-07. University of Nevada, Reno, 2021.
12.
HajjE. Y.AschenbrenerT. B.Nener-PlanteD.Case Studies on the Implementation of Balanced Mix Design and Performance Tests for Asphalt Mixtures: Virginia Department of Transportation (VDOT). Report No. WRSC-TR-21-08. University of Nevada, Reno, 2021.
Vermont Agency of Transportation. Project Special Provision. Section 900 – Superpave Bituminous Concrete Pavement, Performance Engineered Method. 2018.
15.
American Association of State Highway and Transportation Officials. AASHTO T 324: Standard Method of Test for Hamburg Wheel-Track Testing of Compacted Asphalt Mixtures. AASHTO, Washington, D.C., 2019.
16.
AzariH.NCHRP Research Results Digest 388: Precision Estimates of AASHTO T 324, Hamburg Wheel-Track Testing of Compacted Hot Mix Asphalt (HMA). Project 10–87-2B. Transportation Research Board of the National Academies, Washington, D.C., 2014.
17.
MohammadL. N.ElseifiM. A.RaghavendraA.YeM.NCHRP Web-Only Document 219: Hamburg Wheel-Track Test Equipment Requirements and Improvements to AASHTO T 324. Transportation Research Board, Washington, D.C., 2015. https://doi.org/10.17226/21931.
18.
American Association of State Highway and Transportation Officials. AASHTO T 393: Determining the Fracture Potential of Asphalt Mixtures Using the Illinois Flexibility Index Test (I-FIT). AASHTO, Washington, D.C., 2021
19.
Maine Department of Transportation. Special Provision. Section 401 – Hot Mix Asphalt Pavement: HMA Hamburg Wheel Track Specification. 2019.
American Society for Testing and Materials. ASTMD8225: Standard Test Method for Determination of Cracking Tolerance Index of Asphalt Mixture Using the Indirect Tensile Cracking Test at Intermediate Temperature. ASTM International, West Conshohocken, PA, 2019.
22.
MogawerW., and Bennert, T. Framework of Asphalt Balanced Mix Design (BMD) for New England Transportation Agencies. Report No. NETCR116. New England Transportation Consortium, Augusta, ME, 2020.
23.
American Association of State Highway and Transportation Officials. AASHTO T 30: Standard Method of Test for Mechanical Analysis of Extracted Aggregate. AASHTO, Washington, D.C., 2019.
24.
American Association of State Highway and Transportation Officials. AASHTO T 308: Standard Method of Test for Determining the Asphalt Binder Content of Hot Mix Asphalt (HMA) by the Ignition Method. AASHTO, Washington, D.C., 2018.
25.
American Association of State Highway and Transportation Officials. AASHTO T 166: Standard Method of Test for Bulk Specific Gravity (Gmb) of Compacted Asphalt Mixtures Using Saturated Surface-Dry Specimens. AASHTO, Washington, D.C., 2016.
26.
American Association of State Highway and Transportation Officials. AASHTO T 209: Standard Method of Test for Theoretical Maximum Specific Gravity (Gmm) and Density of Asphalt Mixtures. AASHTO, Washington, D.C., 2020.
27.
American Association of State Highway and Transportation Officials. AASHTO T 269: Standard Method of Test for Percent Air Voids in Compacted Dense and Open Asphalt Mixtures. AASHTO, Washington, D.C., 2020.
28.
Asphalt Institute. MS-2 Asphalt Mix Design Methods. Asphalt Institute, 2014.
29.
WenH.WuS.MohammadL. N.ZhangW.ShenS.FaheemA.Long-Term Field Rutting and Moisture Susceptibility Performance of Warm-Mix Asphalt Pavement. Transportation Research Record: Journal of the Transportation Research Board, 2016. 2575: 103–112.
30.
TranN.YinF.LeivaF.RodeznoC.HuberG.PineW.NCHRP Report 20-07: Adjustments to the Superpave Volumetric Mixture Design Procedure for Selecting Optimum Asphalt Content. National Cooperative Highway Research Program, Transportation Research Board, The National Academies, Washington, D.C., 2019. https://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP20-07_412FinalReport.pdf
31.
American Association of State Highway and Transportation Officials. AASHTO T 332: Performance-Graded Asphalt Binder Using Multiple Stress Creep Recovery (MSCR) Test, AASHTO, Washington, D.C., 2021.
