Zakrzewski Mateusz, Gancarz Mateusz, Tvrdá Katarína, Laskowska-Bury Joanna, Domski Jacek
Faculty of Civil Engineering, Environmental and Geodetic Sciences, Koszalin University of Technology, Sniadeckich 2, 75-453 Koszalin, Poland.
Faculty of Civil Engineering, Slovak University of Technology, Radlinského 2766/11, 810 05 Bratislava, Slovakia.
Materials (Basel). 2023 Feb 15;16(4):1625. doi: 10.3390/ma16041625.
This study presents the results of laboratory experiments conducted to determine the mechanical parameters for cement mortar with various quantities of waste fibers, polypropylene microfibers, and steel microfibers. Waste fibers were used as samples and obtained using an end-of-life car tire recycling process. For comparison, samples with the addition of steel and polypropylene microfibers were tested. The same degrees of fiber reinforcement were used for all types of fibers. Ultimately, 22 mixtures of cement mortar were prepared. The aim of this study is therefore to present and compare basic mechanical parameter values. Compressive strength, flexural strength, fracture toughness, and flexural toughness were of particular interest. A three-point bending test was performed on three types of samples, without a notch and with a notch of 4 and 8 mm. The results show that the use of steel microfibers in the cement mortar produces a product with better properties compared to a mixture with steel cord or polypropylene fibers. However, the cement mortar with the steel cord provides better flexural strength and greater flexural toughness factors compared to the cement mortar with polypropylene fibers. This means that the steel cord is a full-value ecological replacement for different fibers.
本研究展示了为确定含有不同数量废纤维、聚丙烯微纤维和钢微纤维的水泥砂浆的力学参数而进行的实验室实验结果。废纤维用作样本，通过废旧汽车轮胎回收工艺获得。为作比较，对添加了钢纤维和聚丙烯微纤维的样本进行了测试。所有类型的纤维均采用相同程度的纤维增强。最终，制备了22种水泥砂浆混合物。因此，本研究的目的是展示和比较基本力学参数值。抗压强度、抗弯强度、断裂韧性和弯曲韧性尤其令人关注。对三种类型的样本进行了三点弯曲试验，样本有无缺口以及缺口分别为4毫米和8毫米。结果表明，与含有钢丝帘线或聚丙烯纤维的混合物相比，在水泥砂浆中使用钢微纤维可生产出性能更佳的产品。然而，与含有聚丙烯纤维的水泥砂浆相比，含有钢丝帘线的水泥砂浆具有更好的抗弯强度和更大的弯曲韧性系数。这意味着钢丝帘线是不同纤维的全值生态替代品。
