Impacts of global warming and variable airborne chloride exposure on concrete structures in Hokkaido, Japan

M. Henry, Y. Tojo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Global warming has become a threat to human societies due to its myriad and complex impacts. Among these are sea level rise and climate change, which carry significant implications for the life-cycle management of concrete infrastructure in coastal areas due to unforeseen changes in chloride exposure, which may lead to uncertainty about structural safety. This may be attributed to the inability of chloride diffusion prediction methods to account for temporal changes in exposure, as conventional methods assume a constant surface chloride ion concentration. However, it may be expected that, due to changes in airborne chloride exposure as a result of global warming, the surface chloride concentration is not constant over time. It is therefore necessary to account for its impacts in the life-cycle management of concrete infrastructure by considering temporal changes in the exposure to airborne chloride. In this study, a method is developed that facilitates the prediction of chloride penetration into concrete under non-constant surface chloride concentrations, which are estimated from the airborne chloride exposure based on sea wind ratio, wind speed, and distance from coastline. The impacts of global warming on chloride diffusion are then estimated at a specified coastal location in Hokkaido, Japan, over a 50-year period using forecasted climate data and simulated sea level rise. Although the numerical simulation results did not find that the chloride con- centration limit necessary to initiate corrosion will be reached in even the most severe prediction scenario, variability in the surface chloride concentration may reduce the safety factor against chloride-induced corrosion, as not considering the effects of global warming may lead to underestimating the actual chloride exposure.

Original languageEnglish
Title of host publicationEASEC16 - Proceedings of the 16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019
EditorsChien Ming Wang, Sritawat Kitipornchai, Vinh Dao
PublisherSpringer Science and Business Media Deutschland GmbH
Pages1989-2000
Number of pages12
ISBN (Print)9789811580789
DOIs
Publication statusPublished - 2021
Event16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019 - Brisbane, Australia
Duration: 2019 Dec 32019 Dec 6

Publication series

NameLecture Notes in Civil Engineering
Volume101
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019
CountryAustralia
CityBrisbane
Period19/12/319/12/6

Keywords

  • Airborne chloride
  • Climate change
  • Concrete corrosion
  • Global warming
  • Sea level rise

ASJC Scopus subject areas

  • Civil and Structural Engineering

Fingerprint Dive into the research topics of 'Impacts of global warming and variable airborne chloride exposure on concrete structures in Hokkaido, Japan'. Together they form a unique fingerprint.

Cite this