Corrosion evaluation of mechanically stabilized earth walls.

PDFTech ReportKTC-05-28/SPR 239-02-1FKY SPR-02-239CorrosionTensile propertiesReinforced earthSlopesEarth wallsDatabasesStability (Mechanics)MetalsKentuckyUniversity of Kentucky Transportation CenterBeckham, Tony L.Sun, LiechengHopkins, Tommy C.University of Kentucky Transportation CenterKentucky. Transportation CabinetUnited States. Federal Highway AdministrationUS Transportation CollectionNumerous reinforced walls and slopes have been built over the past four decades in Kentucky, the United States, as well as worldwide. Tensile elements used in constructing low-cost reinforcing walls and slopes consist of metal polymer strips or grids. Although reinforced structures have been used extensively, the effects of corrosion on the metal tensile elements are unknown. Mechanically stabilized earth walls are expected to remain stable for many decades. An examination of the effects of corrosion of metal tensile elements used to construct these walls can provide invaluable data regarding he longevity of reinforced walls and slopes. Four mechanically stabilized earth walls constructed with galvanized steel reinforcing elements were instrumented and corrosion rate obtained. Corrosion data obtained indicate the designed sacrificial thickness will not be used during the design life of the structures. No visible corrosion was observed in reinforcing elements removed from a mechanically stabilized earth wall that had been in service for more than 20 years. A database was constructed to manage inventory of mechanically stabilized earth walls constructed and maintained by the Kentucky Transportation Cabinet