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首页> 外文期刊>Arabian Journal for Science and Engineering >Rheological Properties and Strength of Polypropylene Fiber-Reinforced Self-compacting Lightweight Concrete Produced with Ground Limestone
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Rheological Properties and Strength of Polypropylene Fiber-Reinforced Self-compacting Lightweight Concrete Produced with Ground Limestone

机译：石灰石粉制备的聚丙烯纤维增强自密实轻质混凝土的流变性能和强度

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摘要

In this study, self-compacting lightweight concrete (SCLC) was prepared using crushed limestone dust, and the effects ofdifferent types of polypropylene fibers and chemical admixtures on the rheological properties of SCLC were investigated.The workability of SCLC was assessed by conducting slump flow, J-Ring, and V-funnel tests, and the compressive strengthof the cubic specimens was measured at the ages of 2, 7, and 28 days. Overall, specimens containing fibers displayed lowerworkability than the control mix; however, a simple adjustment of the dosages of the superplasticizer and viscosity-modifyingadmixture remedied this problem. The results reveal that themaximum fiber content is 4 kg/m~3 formicrofibers and 6 kg/m~3 formacrofibers. Producing SCLC containing 33% limestone powder by weight as cementitious material satisfied self-compactingconcrete requirements and exhibited compressive strength greater than 55 MPa at the age of 28 days.
机译：本研究利用石灰石碎屑制备了自密实轻质混凝土（SCLC），研究了不同类型的聚丙烯纤维和化学外加剂对SCLC流变性能的影响。通过坍落流评估了SCLC的可加工性，分别在2天，7天和28天的年龄测量了J型环和V型漏斗测试，并测量了立方试样的抗压强度。总体而言，含纤维的样品的可加工性低于对照混合物。但是，只需简单调整减水剂和粘度调节剂的用量即可解决此问题。结果表明，超细纤维的最大纤维含量为4 kg / m〜3，超细纤维的最大纤维含量为6 kg / m〜3。所生产的SCLC含33％的石灰石粉作为水泥质材料，可满足自密实混凝土的要求，并在28天龄时表现出大于55 MPa的抗压强度。

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