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Basalt-polypropylene fiber reinforced concrete for durable and sustainable pipe production. Part 1: Experimental program
Structural Concrete ( IF 3.2 ) Pub Date : 2021-05-17 , DOI: 10.1002/suco.202000759
Zhiyun Deng 1, 2 , Xinrong Liu 1, 2 , Peng Chen 1, 2 , Albert Fuente 3 , Xiaohan Zhou 1, 2 , Ninghui Liang 1, 2 , Yafeng Han 1, 2 , Libing Du 1, 2
Affiliation  

An experimental program consisting in producing and testing reinforced concrete pipes (RCPs) under the three-edge bearing tests considering different types of reinforcement was carried out. Four types of RCPs were produced, these reinforced with: (1) polypropylene macrofibers; (2) basalt microfibers; (3) combination of both (hybrid reinforcement); and (4) plain concrete. The analysis of the crack patterns and both service and ultimate mechanical responses allowed concluding that the use of fibers do not lead to an effective increase of the first cracking load; however, both types of fibers allowed a better crack width control respect to the standard RCP. In this regard, basalt microfiber reinforced concrete led to a better response caused by concentrated loads (jacketing) whilst polypropylene macrofibers increased the concrete pipe performance in terms of bearing capacity and flexural crack control. The hybrid fiber reinforced concrete was found to be the most suitable alternative for increasing the load bearing capacity and the crack width control for service loads. These incipient experimental results permit to conclude that this type of hybrid basalt-polypropylene fiber reinforced concretes are an interesting alternative to traditional steel-cage RCPs.

中文翻译:

玄武岩聚丙烯纤维增强混凝土用于耐用和可持续的管道生产。第 1 部分:实验程序

在考虑不同类型钢筋的三边承载试验下,进行了一项包括生产和测试钢筋混凝土管 (RCP) 的实验程序。生产了四种类型的 RCP,这些 RCP 用以下材料增强:(1) 聚丙烯粗纤维;(2) 玄武岩超细纤维;(3) 两者结合(混合加固);(4)素混凝土。对裂纹模式以及服役和最终机械响应的分析得出的结论是,使用纤维不会导致第一次开裂载荷的有效增加;然而,相对于标准 RCP,两种类型的纤维都可以更好地控制裂缝宽度。在这方面,玄武岩超细纤维增强混凝土在集中载荷(夹套)引起的响应更好,而聚丙烯粗纤维提高了混凝土管道在承载能力和弯曲裂缝控制方面的性能。混合纤维增强混凝土被认为是提高承载能力和控制服务荷载的裂缝宽度的最合适的替代方案。这些初步的实验结果可以得出结论,这种混合玄武岩-聚丙烯纤维增强混凝土是传统钢笼 RCP 的有趣替代品。
更新日期:2021-05-17
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