Assessing grout imperfections in prestressed concrete using MWCNTs and temperature-magnetic response techniques
Source abstract
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. • Void defects in MWCNT-mixed grout were detected via heating and magnetic properties. • MWCNT-grout specimens were fabricated by controlling the filling rate. • The optimal MWCNT concentration required for measuring the filling rate was 1.0 wt%. • Networks in MWCNTs enabled the thermal and electrical properties in grout specimens. • Measuring temperature variations and magnetic field strength could detect voids.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Smart Materials for Construction · Concrete and Cement Materials Research · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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