当前位置: X-MOL 学术Mater. Struct. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparing durability of steel reinforced grout (SRG) and textile reinforced mortar (TRM) for structural retrofitting
Materials and Structures ( IF 3.8 ) Pub Date : 2021-06-03 , DOI: 10.1617/s11527-021-01729-3
Cesare Signorini , Andrea Nobili

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.



中文翻译:

比较用于结构改造的钢增强灌浆 (SRG) 和织物增强砂浆 (TRM) 的耐久性

我们评估钢增强灌浆 (SRG) 和织物增强水泥基/纺织增强砂浆在暴露于侵蚀性环境中的拉伸性能。镀锌和黄铜涂层超高抗拉强度钢织物被考虑用于 SRG,而碳、AR 玻璃、玄武岩和 PBO 织物被研究用于 TRM,在普通水泥砂浆中。暴露于腐蚀性环境是通过将样品在受控温度下浸入蒸馏水以及碱性、盐水和酸性溶液中 1000 小时(41.6 天)来实现的。矩形 1 层试样的机械性能在单轴牵引下进行评估:计算并比较极限强度和伸长率、失效时的耗散能量和设计值的环境转换系数。发现依赖于所考虑的侵略性环境存在显着的性能差异。因此,仔细选择增强织物在耐用性方面具有显着优势,应在设计阶段加以利用。提供了一个简单的材料选择矩阵,它建议了用于设计目的的最佳增强纺织品/侵蚀性环境组合。

更新日期:2021-06-03
down
wechat
bug