AASHTO R 118-2023
Characterizing the Relaxation Behavior of Asphalt Binders Using the DeltaTc ( ΔTc) Parameter
- Standard No.
- AASHTO R 118-2023
- Release Date
- 2023
- Published By
- The American Road & Transportation Builders Association
- Latest
- AASHTO R 118-2023
- Introduction
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Standard Name: Standard Practice for Characterizing the Relaxation Behavior of Asphalt Binders Using the Delta Tc (ΔTc) Parameter
Standard Number: AASHTO R 118-231
Scope:
1.1 This practice evaluates the low-temperature behavior of asphalt binders using results from the Bending Beam Rheometer (BBR) test, specifically stiffness and m-value, to calculate the Delta Tc (ΔTc) parameter. This parameter indicates the relaxation properties of the asphalt binder. The practice is primarily intended for residue generated after long-term conditioning with T 240 (Rolling Thin-Film Oven) and R 28 (Pressurized Aging Vessel), but can also be applied to recovered asphalt binder from mixtures, reclaimed asphalt pavement (RAP), and reclaimed asphalt shingles (RAS).
1.2 The low-temperature behavior of asphalt binders provides insights into their relaxation properties, which are crucial for minimizing non-load related cracking in asphalt pavements.
1.3 This practice can be used alongside M 320, Performance-Graded Asphalt Binder, or M 332, Performance-Graded Asphalt Binder Using the Multiple Stress Creep Recovery (MSCR) Test.
1.4 SI units are the standard for the values stated in this practice.
1.5 This standard does not address all safety concerns associated with its use. Users are responsible for establishing appropriate safety and health practices and determining the applicability of regulatory limitations.
AASHTO R 118-2023 history
- 2023 AASHTO R 118-2023 Characterizing the Relaxation Behavior of Asphalt Binders Using the DeltaTc ( ΔTc) Parameter
