Le Chi Hiep, Louda Petr, Ewa Buczkowska Katarzyna, Dufkova Iva
Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studenstká 2, 461 17 Liberec, Czech Republic.
Department of Materials Technology and Production Systems, Faculty of Mechanical Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland.
Polymers (Basel). 2021 Feb 28;13(5):751. doi: 10.3390/polym13050751.
This paper presents an experimental research on the mechanical properties of the hybrid composite thin-plates of the short basalt fibers (CBFs)/carbon textile-reinforced geomortar. The effect of fiber contents and lengths of CBFs on the flexural behavior of carbon textile-reinforced geopolymer specimens (TRGs) was investigated by the four-point flexural strength and Charpy impact test. The experimental results of hybrid TRGs, on the one hand, were compared with reference TRGs, without CBF addition; on the other hand, they were compared with the results of our previous publication. According to the mixing manner applied, fresh geomortar indicated a marked reduction in workability, increasing the CBF loading. Furthermore, using CBFs with lengths of 12 mm and 24 mm makes it easy to form the fiber clusters in geomortar during mixing. According to all the CBF loadings used, it was found that TRGs showed a significant improvement in both static and dynamic flexural strength. However, the failure mode of these TRGs is similar to that of the reference TRGs, described by the process of fiber debonding or simultaneously fiber debonding and collapse. In comparison with our prior work results, neither the CBF dose levels nor the fiber lengths used in this work have yielded a positive effect on the failure manner of TRGs. According to the results of the Charpy impact test, this reveals that the anchoring capacity of textile layers in geomortar plays an important role in specimens' strength.
本文介绍了短玄武岩纤维（CBF）/碳纤维织物增强地聚合物混合复合薄板力学性能的实验研究。通过四点弯曲强度和夏比冲击试验，研究了CBF纤维含量和长度对碳纤维织物增强地聚合物试件（TRG）弯曲性能的影响。一方面，将混合TRG的实验结果与未添加CBF的参考TRG进行比较；另一方面，将其与我们之前发表的结果进行比较。根据所采用的混合方式，随着CBF含量的增加，新鲜地聚合物的工作性显著降低。此外，使用长度为12毫米和24毫米的CBF使得在混合过程中容易在地聚合物中形成纤维簇。根据所有使用的CBF含量，发现TRG在静态和动态弯曲强度方面均有显著提高。然而，这些TRG的破坏模式与参考TRG相似，表现为纤维脱粘过程或同时发生纤维脱粘和破坏。与我们之前的工作结果相比，本工作中使用的CBF剂量水平和纤维长度均未对TRG的破坏方式产生积极影响。根据夏比冲击试验结果，这表明地聚合物中织物层的锚固能力对试件强度起着重要作用。
