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Influence of MSWI bottom ash as unbound granular material on the corrosion behaviour of reinforced concrete

Autordel Valle-Zermeño, R.; Medina, E.; Chimenos, J.M.; Formosa, J.; Llorente, Irene; Bastidas, David M.
Palabras claveCorrosion
Steel rebar
Granular materials
Reinforced concrete
MSWI bottom ash
Fecha de publicación2017
EditorSpringer
CitaciónJournal of Material Cycles and Waste Management 19 (1): 124-133 (2017)
ResumenThe reutilisation of MSWI natural weathered bottom ash (WBA) in many applications such as road and underground constructions, embankments or as an aggregate replacement is a common practice in many developed countries. Its potential environmental risk has regularly been evaluated from the point of view of the leaching of heavy metals and metalloids. Nevertheless, the influence over steel rebar when reinforced concrete is exposed to the contact with WBA has been poorly assessed before. In this study, it has been possible to evaluate in terms of days the probability of corrosion in a common case of WBA reutilisation, which is in contact with reinforced concrete formulated with conventional Portland cement. The corrosion monitoring indicates that the probability of corrosion of steel rebar is higher than 90 % with a corrosion rate (CI) estimated to be 11.6 lm year-1. The aggressive conditions imposed by WBA suppose an important withdrawal if the application of reutilisation involves contact with steel rebar.
Versión del editorhttps://doi.org/10.1007/s10163-015-0388-5
URIhttp://hdl.handle.net/10261/172163
Identificadoresdoi: 10.1007/s10163-015-0388-5
issn: 1438-4957
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