Fabric-Reinforced Cementitious Matrix composites represent a promising solution for the strengthening and the upgrading of existing concrete structures. The bond-slip behavior of the FRCM-substrate interface plays an important role in the effectiveness of the reinforcement application. This paper is devoted to understanding the effect of the substrate roughness – obtained in this case by means of a hydroscarification of concrete surfaces with different water pressure stages – on the bond behavior at the interface level, by performing single lap shear tests with a very limited anchorage length. A proper surface machining can increase the roughness of the substrate, ensuring a better interaction at the interface layer, thus preventing premature delamination failures.
The role of concrete substrate roughness on externally bonded Fabric-Reinforced Cementitious Matrix (FRCM) layers
Rampini M. C.;Zani G.;Colombo M.;di Prisco M.
2019-01-01
Abstract
Fabric-Reinforced Cementitious Matrix composites represent a promising solution for the strengthening and the upgrading of existing concrete structures. The bond-slip behavior of the FRCM-substrate interface plays an important role in the effectiveness of the reinforcement application. This paper is devoted to understanding the effect of the substrate roughness – obtained in this case by means of a hydroscarification of concrete surfaces with different water pressure stages – on the bond behavior at the interface level, by performing single lap shear tests with a very limited anchorage length. A proper surface machining can increase the roughness of the substrate, ensuring a better interaction at the interface layer, thus preventing premature delamination failures.File | Dimensione | Formato | |
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2019 - Rampini et al. - The role of concrete substrate roughness on externally bonded Fabric-Reinforced Cementitious Matrix (FRCM) layer.pdf
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