Alessandro P. Fantilli, Barbara Frigo, Farmehr M. Dehkordi
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引用次数: 0
摘要
使用冰作为结构材料有两个主要问题:结构强度低和脆性破坏。为了找到解决这些问题的方法,本文介绍了一项针对纤维增强冰(FRI)样品的实验活动,该样品由清水和生物纤维制成。总共在零下 18 °C 的温度下浇铸了 12 块不同纤维含量的冰棱柱,然后进行了三点弯曲和单轴压缩测试。测试结果表明,与普通冰相比,增强材料的存在提高了抗弯强度和抗压强度。此外,FRI 是一种韧性更强的材料,因为在抗弯试验中可以观察到多重开裂和挠曲硬化行为。然而,普通冰的机械性能并不总是因为纤维增强而得到提高。因此,我们还提出了一个能够预测生物纤维最佳含量的经验模型。
The use of ice as structural material has two main concerns: the low strength and the brittle failure of the structures. With the aim of finding a solution to these problems, an experimental campaign, performed on fiber-reinforced ice (FRI) samples, made with plain water and bio-fibers, is presented in this paper. In total, 12 ice prisms were cast at − 18 °C with a different content of fibers, and then tested in three-point bending and uniaxial compression. Test results indicate that the presence of a reinforcement increases both flexural and compressive strength with respect to plain ice. Moreover, FRI is a tougher material, as multiple cracking and deflection hardening behavior can be observed in the flexural tests. However, the mechanical performances of plain ice are not always enhanced by the fiber-reinforcement. Therefore, an empirical model, capable of predicting the optimal content of bio-fibers, is also proposed.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.