Abstract
Unfilled grout inside steel ducts used in prestressed concrete bridges causes corrosion of the steel reinforcement within the grout. This research aimed to detect imperfections in prestressed concrete grout infused with multi-walled carbon nanotubes (MWCNTs) by utilizing Joule heating and measuring magnetic arena strength. Grout specimens containing MWCNTs were prepared with dimensions of ø100 mm × 200 mm. The grout satisfying rate and concentration of MWCNTs were used as test parameters. Joule heating experiments were performed, and magnetic arena measurements were obtained to investigate temperature variations and magnetic arena strength, respectively. The analysis revealed that grout mixed with 1.0 wt% MWCNT exhibited the largest temperature variation and magnetic arena strength, and these factors decreased with decreasing MWCNT concentration. The results confirm that detecting unfilled grout in steel ducts can be successfully achieved by measuring temperature variations and magnetic arena strength.
| Original language | English |
|---|---|
| Article number | e04339 |
| Journal | Case Studies in Construction Materials |
| Volume | 22 |
| DOIs | |
| Publication status | Published - Jul 2025 |
Bibliographical note
Publisher Copyright:© 2025 The Authors
Keywords
- Joule heating properties
- Magnetic arena strength
- Multi-walled carbon nanotube
- Nano-grout
- Satisfying rate
- Temperature variation
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