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.
2019
Proceedings of the 1st fib Italy YMG Symposium on Concrete and Concrete Structures, FIBPRO 2019
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1171161
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