TY - GEN
T1 - An experimental discussion on bond strength reduction of ASR damaged concrete
AU - Yamamoto, D.
AU - Hamada, H.
AU - Sagawa, Y.
N1 - Publisher Copyright:
© 2021 Taylor & Francis Group, London
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
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U2 - 10.1201/9780429279119-361
DO - 10.1201/9780429279119-361
M3 - Conference contribution
AN - SCOPUS:85117579065
SN - 9780367232788
T3 - Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020
SP - 2644
EP - 2650
BT - Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020
A2 - Yokota, Hiroshi
A2 - Frangopol, Dan M.
PB - CRC Press/Balkema
T2 - 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020
Y2 - 11 April 2021 through 15 April 2021
ER -