Tomoya Nishiwaki

Dr. Tomoya Nishiwaki

Tohoku University, Sendai, Miyagi, Japan
orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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30 June 2009 in Journal of Advanced Concrete Technology
Verified
Journal Article
Closed access
DHDaisuke Homma
Daisuke Homma
HMHirozo Mihashi
Hirozo Mihashi
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki

16 June 2012 in Journal of Advanced Concrete Technology
Verified
Journal Article
Open access
PDF file
HMHirozo Mihashi
Hirozo Mihashi
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki

1 January 2006 in Journal of Advanced Concrete Technology
Verified
Journal Article
Closed access
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki
HMHirozo Mihashi
Hirozo Mihashi
BJByung-Koog Jang
Byung-Koog Jang
KMKazuaki Miura
Kazuaki Miura

13 March 2014 in Materials
Verified
Journal Article
Open access
PDF file
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki
SKSukmin Kwon
Sukmin Kwon
DHDaisuke Homma
Daisuke Homma
MYMakoto Yamada
Makoto Yamada
HMHirozo Mihashi
Hirozo Mihashi
Various types of fiber reinforced cementitious composites (FRCCs) were experimentally studied to evaluate their self-healing capabilities regarding their watertightness and mechanical properties. Cracks were induced in the FRCC specimens during a tensile loading test, and the specimens were then immersed in static water for self-healing. By water permeability and reloading tests, it was determined that the FRCCs containing synthetic fiber and cracks of width within a certain range (<0.1 mm) exhibited good self-healing capabilities regarding their watertightness. Particularly, the high polarity of the synthetic fiber (polyvinyl alcohol (PVA)) series and hybrid fiber reinforcing (polyethylene (PE) and steel code (SC)) series showed high recovery ratio. Moreover, these series also showed high potential of self-healing of mechanical properties. It was confirmed that recovery of mechanical property could be obtained only in case when crack width was sufficiently narrow, both the visible surface cracks and the very fine cracks around the bridging of the SC fibers. Recovery of the bond strength by filling of the very fine cracks around the bridging fibers enhanced the recovery of the mechanical property.

21 June 2012 in Journal of Advanced Concrete Technology
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Journal Article
Open access
PDF file
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki
MKMarina Koda
Marina Koda
MYMakoto Yamada
Makoto Yamada
HMHirozo Mihashi
Hirozo Mihashi
TKTakatsune Kikuta
Takatsune Kikuta

10 September 2024 in Composites Part B: Engineering
Verified
Journal Article
Closed access
FWFei Wang
Fei Wang
JZJiabao Zhai
Jiabao Zhai
YDYao Ding
Yao Ding
Tomoya NishiwakiTomoya Nishiwaki
Tomoya Nishiwaki
JYJiangtao Yu
Jiangtao Yu
QHQibing Hang
Qibing Hang