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- W34821423 abstract "On July of 1997, one of the Minnesota Road Research project (Mn/Road) test sections (cell28) exhibited significant rutting after receiving approximately 59,000 ESALs. The rut depth was as deep as 25.4 mm (1 inch). A comprehensive forensic excavation of the section, laboratory study and analysis were therefore conducted to investigate the failure mechanism. Historical rutting measurements showed that rutting of this section began almost immediately after the section opened to traffic. Rut depth had been increasing since then and reach approximate 1 inch in the summer of 1997. From the forensic excavation, the cross-sections revealed that the primary rutting of the pavement was due to permanent deformation of the aggregate base, which indicated base failure. After the forensic excavation, laboratory tests were performed on the aggregate base material to obtain shear strength using conventional triaxial experiments. Mohr-Coulomb failure criteria were established. WESLEA was used to calculate stresses in the base and the calculated stresses were compared with the strength. The results indicated that the stresses in the middle of the base exceeded the material strength, which caused bearing capacity failure in the base. This analysis suggests that a minimum asphalt pavement thickness should be established in a mechanistic-empirical design method to prevent bearing capacity failure of subsurface layers. Furthermore, the strain measurement on the bottom of the pavement was examined." @default.
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- W34821423 date "2007-01-01" @default.
- W34821423 modified "2023-09-27" @default.
- W34821423 title "Failure Analysis of Flexible Pavement Section on Mn/Road" @default.
- W34821423 hasPublicationYear "2007" @default.
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