Abrasion resistance of milling steel fiber-reinforced ultra-high-performance concrete under various wearing conditions

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2023-12-20 DOI:10.1680/jmacr.23.00236

Hengchang Wang, Baixi Chen, Yibo Yang, Yinggan Xia, Qifeng Xiao, Shaokun Liu, Wenying Guo

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Abstract

Ultra-high-performance concrete (UHPC) is susceptible to various forms of abrasion during its service life. This study investigates the abrasion resistance of UHPC by focusing on two primary causes of wear: traffic dynamic loads and hydraulic impacts. To enhance the material's resistance to abrasion, milling steel fibers were utilized, and for comparative purposes, straight steel fibers and hybrid milling-straight steel fibers were also employed. The protective function of the steel fibers primarily comes into effect once the concrete cover has experienced wear. When subjected to traffic and hydraulic loads, UHPC containing milling fibers exhibited superior resistance compared to that containing straight fibers, while maintaining favorable workability. Notably, the UHPC incorporating hybrid steel fibers, which form a composite skeleton due to the presence of two fiber types, demonstrated even greater effectiveness in resisting external abrasion. Furthermore, the abrasion resistances observed under both traffic and hydraulic conditions displayed a positive linear correlation with an R² value exceeding 0.8. These findings suggest the feasibility of evaluating the material's abrasion resistance under various wearing causes using a single test method. The outcomes of this study hold promise in advancing the development of UHPC and promoting its utilization in conditions characterized by severe abrasion.

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铣削钢纤维增强超高性能混凝土在各种磨损条件下的耐磨性

超高性能混凝土（UHPC）在其使用寿命期间容易受到各种形式的磨损。本研究针对磨损的两个主要原因--交通动荷载和液压冲击，对超高强度混凝土的耐磨性进行了研究。为了增强材料的耐磨性，我们使用了铣削钢纤维，同时还使用了直钢纤维和铣削-直混合钢纤维进行比较。钢纤维的保护功能主要是在混凝土覆盖层受到磨损后发挥作用。在承受交通荷载和液压荷载时，含有铣削纤维的超高性能混凝土比含有直纤维的超高性能混凝土表现出更强的抗压性，同时还能保持良好的工作性。值得注意的是，含有混合钢纤维的 UHPC 由于含有两种纤维而形成了复合骨架，在抵抗外部磨损方面表现出了更大的功效。此外，在交通和水力条件下观察到的耐磨性显示出正线性关系，R2 值超过 0.8。这些发现表明，使用单一测试方法评估材料在各种磨损原因下的耐磨性是可行的。这项研究的结果有望推动超高性能混凝土的发展，并促进其在磨损严重的条件下的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.