Evaluation of the MEPDG Dynamic Modulus Prediction Models for Asphalt Concrete Mixtures
Publication: Transportation and Development Institute Congress 2011: Integrated Transportation and Development for a Better Tomorrow
Abstract
HMA dynamic modulus (E*) is one of key inputs to the Mechanistic-Empirical Pavement Design Guide (MEPDG). There are two different E* models in the MEPDG; the NCHRP 1-37A viscosity-based model, and the NCHRP 1-40D, which is based on the binder shear modulus. This paper focuses on evaluating the influence of the binder characterization input level on the predicted E* in MEPDG. Laboratory E* tests were conducted on samples from 15 different HMA plant-produced mixtures. The shear modulus (G*) and phase angle (δ) for each binder were also determined in the laboratory. Results showed that MEPDG levels 1and 3 binder characterization inputs with both E* predictive models yielded E* values that are in excellent to fair agreement with laboratory measured E* . However, the 1-37A model showed better results than the 1-40D model. On the other hand, high bias in E* values was observed when level 1 binder characterization data was used.
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© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Asphalt concrete
- Asphalt pavements
- Asphalts
- Binders (material)
- Composite materials
- Dynamic models
- Dynamic modulus
- Engineering fundamentals
- Engineering materials (by type)
- Fiber reinforced composites
- Infrastructure
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Mechanical properties
- Mixtures
- Models (by type)
- Pavements
- Shear modulus
- Transportation engineering
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