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Comparative Fracture Properties of Four Fibre Reinforced High Performance Cementitious Composites

机译：四纤维增强高性能水泥复合材料的比较裂缝性能

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摘要

This study investigates the fracture properties of high performance cementitious composites (HPCC) with four different types of fibres and with volume fraction content 3%. The four fibres are steel hooked end (S), polypropylene crimped (PP), basalt chopped (B), and glass (G) fibres. The tests were carried out in accordance with the RILEM recommendations. In order to examine the fresh properties of HPCC the slump flow tests were performed. Twelve fibre reinforced HPCC beam specimens with notch were cast and tested using central point loading experiments. In addition, experimental tests of the compressive strength and splitting tensile strength were carried out. The test results made it possible to obtain representative fracture parameters, such as the equivalent strengths, residual strengths, and fracture energy of fibre reinforced HPCC. The S fibre specimens showed the best performance in terms of workability, compressive strength, tensile splitting strength, and fracture energy at large deflection. On the other hand, G fibre specimens exhibited the best performance in terms of flexural strength, equivalent flexural strength at higher deflection, and residual flexural strength at lower deflection. In terms of equivalent flexural strength at lower deflection and residual flexural strength at higher deflection, basalt fibre specimens performed the best. On the contrary, polypropylene fibre reinforced beam specimens revealed the highest deflection capacity.
机译：本研究研究了高性能水泥复合材料（HPCC）的裂缝性能，具有四种不同类型的纤维，体积分数含量3％。四根纤维是钢钩端，聚丙烯卷曲（PP），玄武岩切碎（B）和玻璃（G）纤维。测试是按照黎利姆建议进行的。为了检查HPCC的新特性，进行了坍落度的流动测试。使用中央点载入实验施放12根纤维增强HPCC光束样品，并测试并测试。此外，进行了抗压强度和分裂拉伸强度的实验测试。测试结果使得可以获得代表性的断裂参数，例如纤维增强HPCC的等效强度，残余强度和断裂能。 S光纤样本在大偏转方面表现出最佳性能，抗压强度，拉伸分裂强度和断裂能量。另一方面，G光纤样本在弯曲强度，等效弯曲强度下表现出最佳性能，在较高偏转下的残余弯曲强度。就较高偏转下较低偏转和残余弯曲强度的等效弯曲强度而言，玄武岩纤维标本最佳。相反，聚丙烯纤维增强梁标本显示出最高的偏转能力。

著录项

  • 期刊名称 Materials
  • 作者

    Piotr Smarzewski;

  • 作者单位
  • 年(卷),期 2020(13),11
  • 年度 2020
  • 页码 2612
  • 总页数 16
  • 原文格式 PDF
  • 正文语种
  • 中图分类 外科学;
  • 关键词

    机译：高性能水泥复合材料;钢纤维;聚丙烯纤维;玄武岩纤维;玻璃纤维;强度;骨折能量;

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