...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research and Technology >Effects of geometry and hybrid ratio of steel and polyethylene fibers on the mechanical performance of ultra-high-performance fiber-reinforced cementitious composites
【24h】

Effects of geometry and hybrid ratio of steel and polyethylene fibers on the mechanical performance of ultra-high-performance fiber-reinforced cementitious composites

机译：钢和聚乙烯纤维的几何形状和混合比对超高性能纤维增强水泥基复合材料力学性能的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study aims to examine the several factors influencing the efficiency of the hybridization of steel and polyethylene (PE) fibers in improving the compressive strength and tensile performance of ultra-high-performance fiber-reinforced cementitious composites (UHPFRCC). For the mechanical tests, three types of steel fibers (i.e., short straight steel (SS), medium-length straight steel (MS), and twisted steel (T) fibers) and four lengths of polyethylene (PE) fibers (i.e., 12mm (SPE), 18mm (MPE), 27mm (LPE), and 36mm (LLPE)) were hybridized. Each specimen included 2vol.% of single or hybrid fibers, and the hybrid ratio was controlled by replacing 0.5% of the steel fibers with the same amount of PE fibers from 0 to 2%. Thus, a total of 7 single and 36 hybrid UHPFRCC specimens were fabricated. From the test results, it was found that the compressive strength decreased proportionally to the PE fiber content, but the decrease was more severe in hybrid specimens, including 1.5% PE fibers, than single fiber specimens, including 2.0% PE fibers. The tensile strength also decreased with an increase of PE fiber content, whereas strain capacity and energy absorption capacity per unit volume substantially improved with the inclusion of PE fibers. The SPE fibers showed the best hybridizing efficiency among PE fibers in improving the tensile strain capacity and energy absorption capacity of UHPFRCC, and the use of T fibers was the most effective in terms of cracking behavior.
机译：这项研究旨在探讨影响钢和聚乙烯（PE）纤维杂交效率提高超高性能纤维增强水泥基复合材料（UHPFRCC）的抗压强度的几个因素。对于机械测试，使用三种类型的钢纤维（即短直钢（SS），中等长度的直钢（MS）和加捻钢（T）纤维）和四种长度的聚乙烯（PE）纤维（即12mm） （SPE），18mm（MPE），27mm（LPE）和36mm（LLPE）杂交。每个样品包括2vol。％的单纤维或杂化纤维，并且通过用0.5％至2％的相同量的PE纤维代替0.5％的钢纤维来控制杂化比。因此，总共制作了7个单一和36个混合UHPFRCC标本。从测试结果中发现，抗压强度与PE纤维含量成正比降低，但是在包含1.5％PE纤维的混合样品中，其抗压强度比包含2.0％PE纤维的单纤维样品的抗压强度更严重。随着PE纤维含量的增加，抗拉强度也降低，而通过包含PE纤维，单位体积的应变能力和能量吸收能力大大提高。在提高UHPFRCC的拉伸应变能力和能量吸收能力方面，SPE纤维在PE纤维中表现出最佳的杂交效率，就裂化性能而言，使用T纤维最为有效。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号