Community Research and Development Information Service - CORDIS

New proceeding to characterise the fatigue performance of bituminous mixtures from its breaking deformation and its fracture energy

The fatigue performance is a fundamental property of the bituminous mixtures. This property defines the performance of the pavement due to fatigue cracking, considering that this is the mechanism, which produces its failure. The lower the fatigue resistance of the mixture is, the higher must be the thickness of the pavement asphalt layers to resist the same number of load applications.

However, and despite its importance, this property is not considered when the mixture and its constituents are designed. The most important reason to this fact is that the determination of the fatigue performance is found out with the help of quite sophisticated tests and equipments which are more common in a laboratory or in an investigation centre than in a work laboratory.

That's why the Road Laboratory of UPC has developed a new proceeding, which permits to evaluate the fatigue performance of the mixture starting from the results obtained by a direct tensile test.

With the parameters determined with direct tensile tests (fracture energy, toughness, tenacity and fracture deformation) it can be evaluated the fatigue performance of the mixture in order to obtain the best composition against the fracture fatigue mechanism.

Reported by

Universitat Politecnica de Catalunya - UPC
C/ Jordi Girona 1-3, Edificio B1
08034 Barcelona
Spain
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