An experimental discussion on bond strength reduction of ASR damaged concrete

D. Yamamoto, H. Hamada, Y. Sagawa

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

Abstract

It is generally said that bonding strength of concrete and rebar decreases if the concrete expand due to ASR. On the other hand, it still remains unclear as how the increment of internal crack due to ASR expansion affects the decrease of bonding strength. Therefore, to clarify how the expansion due to ASR affects the bonding strength of concrete and rebar, bond strength test of rebar and observation of the internal crack after bond strength test were performed. As results of the experiment, the bond strength of the round steel bar decreased dramatically at 0.05% of ASR expansion. It may be said that most of the chemical bonding, and frictional bonding component were lost. On the other hand, bond strength of deformed rebar did not show significant decrease at 0.05% of ASR expansion. That considered due to mechanical bonding effect. After that as expansion increase, deformed rebar also show continued decreasing of bond strength.

Original languageEnglish
Title of host publicationBridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020
EditorsHiroshi Yokota, Dan M. Frangopol
PublisherCRC Press/Balkema
Pages2644-2650
Number of pages7
ISBN (Electronic)9780429279119
ISBN (Print)9780367232788
DOIs
Publication statusPublished - 2021
Event10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020 - Sapporo, Japan
Duration: Apr 11 2021Apr 15 2021

Publication series

NameBridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020

Conference

Conference10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020
Country/TerritoryJapan
CitySapporo
Period4/11/214/15/21

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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