Abstract This experimental study shows the conjunction of fracture mechanics with the ability of high-performance concrete (HPC) to resist an aggressive chloride environment. Moreover, the influence of a chloride-contaminated environment on the fracture toughness and fracture resistance under the mixed mode I/II is presented. The experimental study was performed considering different aggressivity levels of the environment, water, and fully saturated sodium chloride solution (NaCl-). The experimental tests were performed on a Brazilian disc specimens to test the indirect tensile strength ft and on a Brazilian disc with a central notch to evaluate the fracture toughness KIC and the fracture resistance under the mixed mode I/II. The mixed mode I/II fracture resistance was evaluated by the generalised maximum tangential stress (GMTS) criterion . The level of chloride contamination present and its boundary in the concrete was estimated by the colorimetric method using silver nitrate (AgNO3).

中文翻译：

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氯化物对高性能混凝土Ⅰ/Ⅱ混合模式下抗裂韧性和抗裂性的影响

摘要 本实验研究表明，断裂力学与高性能混凝土 (HPC) 抵抗侵蚀性氯化物环境的能力相结合。此外，还介绍了混合模式 I/II 下氯化物污染环境对断裂韧性和断裂阻力的影响。考虑到环境、水和完全饱和的氯化钠溶液 (NaCl-) 的不同侵蚀性水平，进行了实验研究。实验测试在巴西圆盘试样上进行，以测试间接拉伸强度 ft，并在具有中央缺口的巴西圆盘上进行，以评估混合模式 I/II 下的断裂韧性 KIC 和断裂阻力。通过广义最大切向应力 (GMTS) 准则评估混合模式 I/II 断裂阻力。