Hedjazi Saman, Castillo Daniel
Civil Engineering and Construction Department, Georgia Southern University, Statesboro, GA, USA.
Heliyon. 2020 Mar 24;6(3):e03646. doi: 10.1016/j.heliyon.2020.e03646. eCollection 2020 Mar.
This paper determines the effect of steel, glass, and nylon fibers on the compressive strength and ultrasonic pulse velocity (UPV) of fiber reinforced concrete. The influence of different fiber types, fiber volume fraction, and water to cement ratios on the compressive strength of fiber reinforced concrete was tested using the compression test machine (CTM) and ultrasonic pulse velocity tester. Experiments were carried out at different ages on more than 100 cylindrical specimens. A comparison between the experimental results and equations available in the literature for prediction of compressive strength in terms of UPV was conducted to better evaluate the accuracy of available methods, when the type and volume fraction of fibers change. A new empirical equation that accounts for the presence of different types of fibers and fiber volume fraction is proposed to better estimate the compressive strength of steel, glass, and nylon fiber reinforced concrete.
本文确定了钢纤维、玻璃纤维和尼龙纤维对纤维增强混凝土抗压强度和超声脉冲速度（UPV）的影响。使用压力试验机（CTM）和超声脉冲速度测试仪，测试了不同纤维类型、纤维体积分数和水灰比对纤维增强混凝土抗压强度的影响。在不同龄期对100多个圆柱形试件进行了试验。在纤维类型和体积分数发生变化时，对实验结果与文献中用于根据UPV预测抗压强度的公式进行了比较，以更好地评估现有方法的准确性。提出了一个考虑不同类型纤维和纤维体积分数的新经验公式，以更好地估计钢纤维、玻璃纤维和尼龙纤维增强混凝土的抗压强度。
