Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Durability of steel FRCM-masonry joints: effect of water and salt crystallization
Fiber-reinforced cementitious matrix (FRCM) composites have been recently employed as a strengthening system to retrofit historic masonry structures, since they are more compatible with masonry, less subject to ageing, and compliant with conservation criteria for cultural heritage than fiber-reinforced polymer composites. However, the durability of FRCMs, such as the resistance to salt attack, has not been deeply investigated yet. In this paper, the mechanical behavior of steel FRCM strips bonded to fired-clay brick masonry blocks is studied experimentally. Single-lap shear tests are conducted in laboratory on control FRCM-masonry joints and on additional joints that underwent artificial weathering cycles in a solution of sodium sulfate decahydrate. Peak loads, slips at failure at the loaded end as well as failure modes are investigated. Pore size distribution of the constituent materials and the amount and distribution of salt within the specimens are reported and discussed in order to evaluate the transport and crystallization mechanisms of sulfate in masonry elements strengthened with externally bonded FRCM strips.
Durability of steel FRCM-masonry joints: effect of water and salt crystallization
Fiber-reinforced cementitious matrix (FRCM) composites have been recently employed as a strengthening system to retrofit historic masonry structures, since they are more compatible with masonry, less subject to ageing, and compliant with conservation criteria for cultural heritage than fiber-reinforced polymer composites. However, the durability of FRCMs, such as the resistance to salt attack, has not been deeply investigated yet. In this paper, the mechanical behavior of steel FRCM strips bonded to fired-clay brick masonry blocks is studied experimentally. Single-lap shear tests are conducted in laboratory on control FRCM-masonry joints and on additional joints that underwent artificial weathering cycles in a solution of sodium sulfate decahydrate. Peak loads, slips at failure at the loaded end as well as failure modes are investigated. Pore size distribution of the constituent materials and the amount and distribution of salt within the specimens are reported and discussed in order to evaluate the transport and crystallization mechanisms of sulfate in masonry elements strengthened with externally bonded FRCM strips.
Durability of steel FRCM-masonry joints: effect of water and salt crystallization
Franzoni, Elisa (Autor:in) / Gentilini, Cristina / Santandrea, Mattia / Zanotto, Sara / Carloni, Christian
2017
Aufsatz (Zeitschrift)
Englisch
Fiber reinforced plastics , Masonry , Operating Procedures, Materials Treatment , Size distribution , Theoretical and Applied Mechanics , Artificial weathering tests , Pore size , Sodium , Historical structures , Loads (forces) , Durability , Pore size distribution , Fiber reinforced polymers , Fiber composites , Cultural heritage , Polymer matrix composites , Weathering , Materials Science, general , Cultural resources , Crystallization , Structural steels , Microstructure , Building Materials , Bonding strength , Cement reinforcements , Bond behavior , Structural Mechanics , Civil Engineering , Shear tests , Brick , Porosity , Mechanical properties , Moisture , Engineering , Salt crystallization , Steel FRCM composite , Failure modes , Clay (material)
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