Journal
MATERIALS AND STRUCTURES
Volume 54, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1617/s11527-021-01729-3
Keywords
TRM; SRG; Durability; Environmental conversion factors
Categories
Funding
- FAR2019 - Piano di Sviluppo Dipartimentale DIEF [498/2019]
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In this study, the tensile performance of Steel Reinforced Grout (SRG) and Fabric Reinforced Cementitious Matrix/Textile Reinforced Mortar (TRM) in various aggressive environments was assessed. Significant differences in performance were observed depending on the aggressive environment, highlighting the importance of careful selection of reinforcing fabric for improved durability. A material selection matrix was proposed to aid in choosing the best reinforcing textile/aggressive environment combination for design purposes.
We assess tensile performance of Steel Reinforced Grout (SRG) and Fabric Reinforced Cementitious Matrix/Textile Reinforced Mortar, upon exposure to aggressive environments. Galvanized and brass-coated Ultra High Tensile Strength Steel fabrics are considered for SRG, while carbon, AR-glass, basalt and PBO fabrics are investigated for TRM, in a common cement mortar. Exposure to the aggressive environments is realized by specimen immersion for 1000 h (41.6 days) at controlled temperature in distilled water as well as alkaline, saline and acid solutions. Mechanical performance of rectangular 1-ply coupons is assessed in uni-axial traction: Ultimate strength and elongation, dissipated energy at failure and environmental conversion factors for design values are calculated and compared. It is found that significant performance difference exists in dependence of the aggressive environment under consideration. As a result, careful selection of the reinforcing fabric leads to substantial advantage in terms of durability, that should be capitalized upon at the design stage. A simple material selection matrix is presented which suggests the best reinforcing textile/aggressive environment combination for design purposes.
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