Among the different surface distresses dealing with bituminous mixes, raveling involving the dislodgement of aggregates from the surface induced by traffic actions is one of the most relevant and complex. Several laboratory tests have been proposed in order to evaluate raveling potential of bituminous mixes and to study mix improvements, but few of them can be applied for in-situ bituminous mixes and even rarer are the predictive models to estimate the evolution of this type of degradation. In this paper, following a new test for the evaluation of in-situ raveling potential that is based on several tire sweep cycles performed on pavement surface by means of steering maneuvers carried out with fixed heavy vehicles, an original methodology for the prediction of the evolution of raveling is proposed. According to the approach proposed within the HDM 4 framework, an initiation and progression model are defined. In particular, both the initiation and the progression model are calibrated by means of visual surveys and the parameter expressing in situ raveling susceptibility derived from the abovementioned tire sweep tests. This methods has been applied to a case study and the preliminary results obtained appears to be promising.
Evaluation of Field Raveling Susceptibility and Evolution of Bituminous Mixtures
D'APUZZO, Mauro;
2012-01-01
Abstract
Among the different surface distresses dealing with bituminous mixes, raveling involving the dislodgement of aggregates from the surface induced by traffic actions is one of the most relevant and complex. Several laboratory tests have been proposed in order to evaluate raveling potential of bituminous mixes and to study mix improvements, but few of them can be applied for in-situ bituminous mixes and even rarer are the predictive models to estimate the evolution of this type of degradation. In this paper, following a new test for the evaluation of in-situ raveling potential that is based on several tire sweep cycles performed on pavement surface by means of steering maneuvers carried out with fixed heavy vehicles, an original methodology for the prediction of the evolution of raveling is proposed. According to the approach proposed within the HDM 4 framework, an initiation and progression model are defined. In particular, both the initiation and the progression model are calibrated by means of visual surveys and the parameter expressing in situ raveling susceptibility derived from the abovementioned tire sweep tests. This methods has been applied to a case study and the preliminary results obtained appears to be promising.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
