The reinforcing efficiency of plastic fibers obtained from shredded plastic waste was tested in plain concrete mixes and experimentally verified in this study. Plastic fibers up to 0.15% V_f were added to the design concrete mix to assess the fiber effectiveness in terms of improved load carrying capability of various plastic fiber incorporated concrete composites. The effects of plastic fibers distributed homogenously in the entire depth of concrete and confined in the tension zone were evaluated in flexural bending properties. Mechanical strength properties were evaluated for two different types of concrete containing (i) plastic fibers added homogenously throughout the entire depth of concrete and (ii) the plastic fibers confined in the tension zone only. Flexural bending parameters such as toughness, residual strength, crack width, post-peak drop load resistance, and fiber performance index of various plastic fiber substituted concrete mixes were tested in compressive and flexural bending to assess the fiber reinforcing efficiency. Test results indicated that the plastic fibers added in tension zone confinement exhibited higher flexural strength (5.26 N/mm²) improvements compared to homogeneously distributed concrete systems. Flexural bending characteristics in terms of absolute toughness and post peak strain softening were found to be appreciably higher (132%) in tension zone confined plastic fiber concretes compared to homogeneous fiber concrete systems.

中文翻译：

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塑料纤维水泥混凝土复合材料的机械强度表征

在普通混凝土混合物中测试了从切碎的塑料废料获得的塑料纤维的增强效率，并在本研究中进行了实验验证。高达0.15％V _f的塑料纤维将其添加到设计的混凝土混合物中，以评估各种掺入塑料纤维的混凝土复合材料在改善的承载能力方面的纤维有效性。在弯曲弯曲性能中评估了塑料纤维在混凝土的整个深度内均匀分布并限制在拉伸区域中的作用。对两种不同类型的混凝土的机械强度性能进行了评估，这些混凝土包含（i）在整个混凝土的整个深度内均匀添加的塑料纤维，以及（ii）仅限于拉伸区域的塑料纤维。弯曲弯曲参数，例如韧性，残余强度，裂缝宽度，峰后跌落载荷阻力，在压缩和弯曲试验中测试了各种塑料纤维替代混凝土混合物的纤维性能指标，以评估纤维增强效率。测试结果表明，在受拉区限制中添加的塑料纤维具有较高的抗弯强度（5.26 N / mm）²）与均质混凝土系统相比的改进。与绝对纤维混凝土系统相比，在张力区受限的塑料纤维混凝土中，就绝对韧性和峰后应变软化而言，弯曲弯曲特性明显更高（132％）。