Abstract

In recent years, a new generation of inorganic matrix-based reinforcement systems is under study worldwide known generically as textile-reinforced mortar (TRM). It is considered one of the most innovative and effective techniques for masonry rehabilitation. This paper focuses on a TRM system made of basalt fibers imbedded in an ettringitic mortar. The aim of this study is to identify the effectiveness of this kind of composite in the domain of masonry structures strengthening. The basalt-TRM performance had been investigated through direct tensile tests and single lap shear tests. Two series of direct tensile tests had been carried out on specimens characterized by two different basalt textile reinforcing ratios. The experimental results allowed to evaluate the tensile behavior of the TRM and to obtain useful information on the reinforcement concept. The use of digital image correlation facilitated a detailed description of the displacement fields and the evolution of the cracks during the tests. Two series of single lap shear tests had been carried out on brick masonry walls, reinforced with the same TRM’s systems tested in tension. The experimental results show a good adhesion between the matrix and the masonry substrate as well as between the matrix and the basalt textile.

摘要

近年来，新一代基于无机基质的增强体系正在世界范围内进行研究，通称为纺织增强砂浆 (TRM)。它被认为是砌体修复中最具创新性和最有效的技术之一。本文重点介绍了一种由玄武岩纤维制成的 TRM 系统，该玄武岩纤维嵌入钙矾石砂浆中。本研究的目的是确定这种复合材料在砌体结构加固领域的有效性。玄武岩-TRM 性能已通过直接拉伸试验和单搭接剪切试验进行了研究。对具有两种不同玄武岩织物增强比的试样进行了两个系列的直接拉伸试验。实验结果可以评估 TRM 的拉伸行为并获得有关加固概念的有用信息。数字图像相关性的使用有助于详细描述测试期间的位移场和裂纹的演变。已经在砖砌体墙上进行了两个系列的单搭接剪切试验，并使用相同的 TRM 系统进行了拉伸试验。实验结果表明，基体与砌体基材之间以及基体与玄武岩织物之间具有良好的附着力。使用相同的 TRM 系统在张力下进行测试进行加固。实验结果表明，基体与砌体基材之间以及基体与玄武岩织物之间具有良好的附着力。使用相同的 TRM 系统在张力下进行测试进行加固。实验结果表明，基体与砌体基材之间以及基体与玄武岩织物之间具有良好的附着力。