A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mechanical Testing of Bituminous Mixtures
This chapter focuses on permanent deformation, which is at the origin of pavement rutting. First experimental laboratory tools and associated analyses related to permanent deformations are presented. It is either material tests, that can be homogeneous or giving a simple empirical characteristic, or non-homogeneous Structural/Specimen tests.
Then, investigations made, by Working Group 3 (WG3) “Mechanical Tests for Bituminous Materials” of the RILEM 206-ATB, are presented. These investigations consider only wheel Tracking Tester (WTT) devices used to evaluate the rutting performance of bituminous mixtures. A first study considers three different bituminous layer systems made with pure bitumen and currently used in road construction. A surprising obtained result is the very poor performance obtained on WTT for one system, while very good rutting resistance is observed on the road.
A second study is performed in order to evaluate the reproducibility of the French Wheel Tracking Test (FWTT) on a mix made with Polymer Modified Bitumen (PmB). For this type of mixture, some peculiar problems had been reported, such as heating of the sample due to friction and sticking of the binder to the wheel. Two procedures, called anti-overheating and anti-sticking procedures, have been proposed by the group in order to improve the reproducibility of the wheel tracking test. Causes of scattering are discussed. Differences between the tires used during this RRT as a possible origin of scattering are discussed, as well as temperature increase and over-compaction of specimens.
The last section presents modeling and simulation using Finite Elements Method performed by the RILEM group. The aim is to build numerical framework based on finite element (FE) simulations for rutting prediction of asphaltic layers. Before performing permanent (viscoplastic) deformations simulation, the work first concentrates on simulating the reversible viscoelastic stresses and strains during wheel tracking tests. The linear viscoelastic (LVE) mixture behavior is modeled by a generalized Kelvin-Voigt or generalized Maxwell model, with fixed and given parameters obtained from the continuum spectrum model 2S2P1D. Both generalized Kelvin-Voigt and Maxwell models, that are equivalent, are presented as well as their calibration. Then some FE simulations are described and their results are presented.
Mechanical Testing of Bituminous Mixtures
This chapter focuses on permanent deformation, which is at the origin of pavement rutting. First experimental laboratory tools and associated analyses related to permanent deformations are presented. It is either material tests, that can be homogeneous or giving a simple empirical characteristic, or non-homogeneous Structural/Specimen tests.
Then, investigations made, by Working Group 3 (WG3) “Mechanical Tests for Bituminous Materials” of the RILEM 206-ATB, are presented. These investigations consider only wheel Tracking Tester (WTT) devices used to evaluate the rutting performance of bituminous mixtures. A first study considers three different bituminous layer systems made with pure bitumen and currently used in road construction. A surprising obtained result is the very poor performance obtained on WTT for one system, while very good rutting resistance is observed on the road.
A second study is performed in order to evaluate the reproducibility of the French Wheel Tracking Test (FWTT) on a mix made with Polymer Modified Bitumen (PmB). For this type of mixture, some peculiar problems had been reported, such as heating of the sample due to friction and sticking of the binder to the wheel. Two procedures, called anti-overheating and anti-sticking procedures, have been proposed by the group in order to improve the reproducibility of the wheel tracking test. Causes of scattering are discussed. Differences between the tires used during this RRT as a possible origin of scattering are discussed, as well as temperature increase and over-compaction of specimens.
The last section presents modeling and simulation using Finite Elements Method performed by the RILEM group. The aim is to build numerical framework based on finite element (FE) simulations for rutting prediction of asphaltic layers. Before performing permanent (viscoplastic) deformations simulation, the work first concentrates on simulating the reversible viscoelastic stresses and strains during wheel tracking tests. The linear viscoelastic (LVE) mixture behavior is modeled by a generalized Kelvin-Voigt or generalized Maxwell model, with fixed and given parameters obtained from the continuum spectrum model 2S2P1D. Both generalized Kelvin-Voigt and Maxwell models, that are equivalent, are presented as well as their calibration. Then some FE simulations are described and their results are presented.
Mechanical Testing of Bituminous Mixtures
Partl, Manfred N. (editor) / Bahia, Hussain U. (editor) / Canestrari, Francesco (editor) / de la Roche, Chantal (editor) / Di Benedetto, Hervé (editor) / Piber, Herald (editor) / Sybilski, Dariusz (editor) / Di Benedetto, Hérve (author) / Gabet, Thomas (author) / Grenfell, James (author)
Advances in Interlaboratory Testing and Evaluation of Bituminous Materials ; Chapter: 4 ; 143-256
2012-09-04
114 pages
Article/Chapter (Book)
Electronic Resource
English
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