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Near-surface mounted (NSM) titanium rods enhance masonry strength. Threaded rods with optimized mortar and bond length provide superior bond performance and pull-out strength in masonry structures.

Keywords:
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Area of Science:

  • Civil Engineering
  • Materials Science
  • Structural Engineering

Background:

  • Masonry structures require strengthening against flexural and shear forces.
  • Advanced materials offer novel solutions for structural reinforcement.
  • Near-surface mounted (NSM) techniques, also known as Bed Joint Reinforcement, are increasingly adopted.

Purpose of the Study:

  • To investigate the bond mechanics of NSM titanium rods in masonry.
  • To evaluate the influence of rod type, bond length, and mortar on bond performance.
  • To identify optimal parameters for effective NSM reinforcement of masonry.

Main Methods:

  • Utilized NSM titanium rods (smooth and threaded) for masonry strengthening.
  • Varied bond length and tested different mortar types for groove filling.
  • Conducted pull-out tests to assess bond strength and performance.

Main Results:

  • Threaded NSM titanium rods demonstrated superior performance compared to smooth rods.
  • Pull-out strength was significantly influenced by the type of mortar used.
  • Optimizing bond length and mortar selection substantially improved bond performance.

Conclusions:

  • NSM titanium rods are a promising technique for enhancing masonry strength.
  • Threaded rods offer better bond performance in NSM applications.
  • Careful selection of mortar and bond length is crucial for maximizing pull-out strength and overall effectiveness.