Permanent deformations in asphalt concrete layers in brazil

Title: Permanent deformations in asphalt concrete layers in brazil
Author(s): F. P. Gonçalves, J. A. Ceratti, L. B. Bernucci
Paper category : conference
Book title: Sixth International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials
Editor(s): M. N. Partl
Print-ISBN: 2-912143-35-7
e-ISBN: 2912143772
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 580 - 586
Total Pages: 7
Nb references: 5
Language: English

Abstract: The presence of rutting in the pavement surface derives from the plastic deformations as well as from the consolidation developed in the layers that constitute the structure and in the subgrade. To reduce the rutting caused by consolidation, an appropriate compacting work is necessary to lessen the air-void content in the materials. The usual procedure adopted to protect the structure from the occurrence of excessive plastic deformations consists in limiting the deformation or vertical stress of compression on top of the subgrade. That procedure assumes that the plastic deformation on the surface of the pavement comes mainly from the subgrade and it will lie below the tolerable limits if the stress or deformation limit on top of the subgrade is not exceeded. Therefore, these procedures do not take into account the deformations that happen in the layers of the pavement structure. This article presents some results obtained from keeping track of the evolution of registrations of permanent deformations in trials carried out under accelerated tests with a linear traffic simulator and some results obtained in the laboratory wheel tracking test utilising specimens extracted from asphalt mixtures compacted in the field. Some performance models are presented as well as a comparison of results among different asphalt linings.

Online publication: 2003-03-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143772.073