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The  strong  diffusion  of  Fiber  Reinforced  Cementitious  Matrix  (FRCM) composites  for  the  reinforcement  of  historic  masonry  constructions  requires  suitable experimental techniques for assessing possible defects in the adhesion between FRCM and masonry, and between FRCM layers. To this aim, in this paper, an innovative nonlinear ultrasonic approach based on the Side-band Peak Count (SPC) technique is proposed. This approach  is  discussed  and  validated  through  experimental  tests  made  on  tuff  substrates reinforced with FRCM mortars embedding a basalt fibers grid and having known artificial defects at the adhesion between tuff and FRCM as well as in the fiber grid

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== Full document ==

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== References ==

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