Abstract Concrete suffers from brittle failure due to its low tensile strength. This drawback can be compensated for by adding reinforcement bars and/or steel fibres, and more recently, macro synthetic fibres. When mixing concrete with these fibres the aggregates could damage the fibres. This paper presents work done on the effect of mixing on the performance of macro synthetic fibre reinforced concrete. Single-fibre pull-out tests were conducted on various fibres in both the original and mixed state. Furthermore, flexural tests were performed to investigate the influence of mixing time and mixer type on the performance. It can be concluded that mixing is beneficial for flat type fibres, but the performance of crimped or embossed fibres remains the same. Furthermore, longer mixing times (> 10 min) in a pan mixer are detrimental to the performance, while the performance in a tilting drum mixer remains unchanged even after a mixing time of 60 min.

中文翻译：

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掺混对粗合成纤维混凝土性能的影响

摘要 混凝土由于抗拉强度低而易发生脆性破坏。这个缺点可以通过添加钢筋和/或钢纤维以及最近的粗合成纤维来弥补。当将混凝土与这些纤维混合时，骨料可能会损坏纤维。本文介绍了在混合对粗合成纤维混凝土性能的影响方面所做的工作。对原始和混合状态的各种纤维进行了单纤维拉拔试验。此外，还进行了弯曲试验以研究混合时间和混合器类型对性能的影响。可以得出结论，混合有利于扁平型纤维，但卷曲或压花纤维的性能保持不变。此外，更长的混合时间 (>