The large use of mechanical-empirical (M-E) pavement design methods requires an extensive know-how concerning the structural behavior of the materials used in the pavement layers, especially regarding the fatigue and permanent deformation performances. Cement-bitumen treated materials (CBTMs) have been used with great success for several years; however, their structural design with a M-E approach is often complex due to a lack of reliable performance models. In recent years, the technical literature investigated the fatigue performance of this type of material but, to date, no reliable model has been defined concerning the evolution of permanent deformation over time. In order to properly describe the rutting behavior of these materials, an extensive in-field and laboratory test campaign has been conducted on specimens that were collected directly from two trial sections laid down over a cement-stabilized subgrade in a motorway construction work zone. The permanent deformation characterization in the CBTM was based on laboratory test measurement complying with the EN 12697-22:2007 “Test methods for hot mix asphalt – wheel tracking”. In a first set of tests, the specimens were analyzed by implementing the procedure provided by the EN standard and subsequently loads and temperature were changed in order to understand the dependence of the permanent deformations on these factors. The results obtained in the experimentation allow defining the evolution of the CBTM rutting over time, and the effect of temperature and applied load.

Analysis of permanent deformation in cement-bitumen treated materials developed by means of wheel tracking test machine / Monica Meocci; Francesca la Torre; Filippo Giammaria Praticò. - ELETTRONICO. - (2019), pp. 531-539. ((Intervento presentato al convegno World Conference on Pavement and Asset Management - WCPAM 2017 tenutosi a Baveno nel June 12/16, 2017.

Analysis of permanent deformation in cement-bitumen treated materials developed by means of wheel tracking test machine

Monica Meocci
;
Francesca la Torre;
2019

Abstract

The large use of mechanical-empirical (M-E) pavement design methods requires an extensive know-how concerning the structural behavior of the materials used in the pavement layers, especially regarding the fatigue and permanent deformation performances. Cement-bitumen treated materials (CBTMs) have been used with great success for several years; however, their structural design with a M-E approach is often complex due to a lack of reliable performance models. In recent years, the technical literature investigated the fatigue performance of this type of material but, to date, no reliable model has been defined concerning the evolution of permanent deformation over time. In order to properly describe the rutting behavior of these materials, an extensive in-field and laboratory test campaign has been conducted on specimens that were collected directly from two trial sections laid down over a cement-stabilized subgrade in a motorway construction work zone. The permanent deformation characterization in the CBTM was based on laboratory test measurement complying with the EN 12697-22:2007 “Test methods for hot mix asphalt – wheel tracking”. In a first set of tests, the specimens were analyzed by implementing the procedure provided by the EN standard and subsequently loads and temperature were changed in order to understand the dependence of the permanent deformations on these factors. The results obtained in the experimentation allow defining the evolution of the CBTM rutting over time, and the effect of temperature and applied load.
World Conference on Pavement and Asset Management, WCPAM 2017
World Conference on Pavement and Asset Management - WCPAM 2017
Baveno
June 12/16, 2017
Monica Meocci; Francesca la Torre; Filippo Giammaria Praticò
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/1116550
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