Fabric-Reinforced Cementitious Matrices (FRCM) have raised a great interest for the external strengthening of historical masonries, representing a valid alternative to fiber reinforced polymers (FRP). As the effectiveness of an external reinforcement firstly depends on the bond performance, this paper presents an experimental investigation, through double shear test, on the bond behavior of cement matrix-based composites reinforced with 3 different textiles: carbon, PBO (polybenzoxazole) and glass. Textiles and matrix specimens were experimentally tested in order to correlate mechanical properties of the constituent materials with the global response of the composites. The results of bond tests highlighted that PBO fiber-based and glass fiber-based composites better exploit the mechanical properties of the textile. Observation of the failure mechanisms highlighted that debonding phenomena occur at fiber/matrix interfaces. Furthermore, the effective anchorage lengths were estimated. The values of fracture energy were determined by a fracture mechanics approach, using the experimental values of debonding loads. Finally, the values of fracture energy were correlated with the mechanical characteristics of the constituent materials.

Experimental investigation on bond behavior of cement matrix-based composites for strengthening of masonry structures / Alecci, Valerio; De Stefano, Mario; Raimondo, Luciano; Rovero, Luisa; Stipo, Gianfranco. - In: JOURNAL OF COMPOSITES FOR CONSTRUCTION. - ISSN 1090-0268. - ELETTRONICO. - 20:(2016), pp. 0-20. [10.1061/(ASCE)CC.1943-5614.0000598]

Experimental investigation on bond behavior of cement matrix-based composites for strengthening of masonry structures

ALECCI, VALERIO;DE STEFANO, MARIO;LUCIANO, RAIMONDO;ROVERO, LUISA;STIPO, GIANFRANCO
2016

Abstract

Fabric-Reinforced Cementitious Matrices (FRCM) have raised a great interest for the external strengthening of historical masonries, representing a valid alternative to fiber reinforced polymers (FRP). As the effectiveness of an external reinforcement firstly depends on the bond performance, this paper presents an experimental investigation, through double shear test, on the bond behavior of cement matrix-based composites reinforced with 3 different textiles: carbon, PBO (polybenzoxazole) and glass. Textiles and matrix specimens were experimentally tested in order to correlate mechanical properties of the constituent materials with the global response of the composites. The results of bond tests highlighted that PBO fiber-based and glass fiber-based composites better exploit the mechanical properties of the textile. Observation of the failure mechanisms highlighted that debonding phenomena occur at fiber/matrix interfaces. Furthermore, the effective anchorage lengths were estimated. The values of fracture energy were determined by a fracture mechanics approach, using the experimental values of debonding loads. Finally, the values of fracture energy were correlated with the mechanical characteristics of the constituent materials.
20
0
20
Alecci, Valerio; De Stefano, Mario; Raimondo, Luciano; Rovero, Luisa; Stipo, Gianfranco
File in questo prodotto:
File Dimensione Formato  
Experimental investigation ASCE.pdf

Accesso chiuso

Tipologia: Pdf editoriale (Version of record)
Licenza: DRM non definito
Dimensione 1.57 MB
Formato Adobe PDF
1.57 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/1003305
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 59
  • ???jsp.display-item.citation.isi??? 41
social impact