Effects of polypyrrole coated rebar on corrosion behavior of tunnel lining with the combination effect of sustained loading and pre-existing cracks when exposed to chlorides
作者： Xiongyu Hu , Chuan He , Kun Feng , Sijing Liu , Gabriel Walton
DOI: 10.1016/J.CONBUILDMAT.2019.06.092
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摘要: Abstract This paper presents an experimental study on the mechanical behavior of a tunnel lining with pre-existing cracks that is subjected to accelerated corrosion. The surface strain, deflection, and load capacity concrete liner material were recorded, as well degree rebar corrosion crack patterns developed. efficacy polypyrrole reinforcement coating in minimizing effects effect physical properties specimens examined. results show both sustained loading have noticeable influence lining. exhibited delayed onset corrosion, less steel mass loss, smaller specimen strains transverse longitudinal width.
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