In this study, the viability of using three test methods for asphalt mixtures and one test method for asphalt
binders are investigated. These test methods are: Bending Beam Rheometer (BBR) for creep and strength of
asphalt mixtures; low temperature Semi Circular Bend (SCB) test for fracture energy of asphalt mixtures; Dynamic
Modulus (E*) test of asphalt mixtures using the Indirect Tensile Test (IDT) configuration; and BBR strength test of
asphalt binders. The materials used in the experimental work were used in MnROAD cells constructed in the
summer of 2016 as part of the MnROAD Cracking Group (CG) experiment, a 3-year pooled-fund project.
The results show that the testing methods investigated provide repeatable results that follow trends similar to
the one observed using traditional methods. The results also show that the properties are highly temperature
dependent and the ranking observed at one temperature can change at a different temperature. In addition, it is
observed that materials with similar rheological properties, such as complex modulus absolute value |E*|, creep
stiffness S, and m-value, do not necessarily have the same fracture resistance. These results confirm one more
time the need for a fracture/strength test for correctly evaluating cracking resistance of asphalt materials.
Marasteanu, Mihai; Turos, Mugurel; Ghosh, Debaroti; Matias de Oliveira, Jhenyffer Lorrany; Yan, Tianhao.
Investigation of Cracking Resistance of Asphalt Mixtures and Binders.
Minnesota Department of Transportation.
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