Valdez Aguilar José, Juárez-Alvarado César A, Mendoza-Rangel José M, Terán-Torres Bernardo T
Facultad de Ingeniería Civil (FIC-UANL), Universidad Autónoma de Nuevo León, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza 66455, Mexico.
Materials (Basel). 2021 Jan 18;14(2):445. doi: 10.3390/ma14020445.
Concrete barely possesses tensile strength, and it is susceptible to cracking, which leads to a reduction of its service life. Consequently, it is significant to find a complementary material that helps alleviate these drawbacks. The aim of this research was to determine analytically and experimentally the effect of the addition of the steel fibers on the performance of the post-cracking stage on fiber-reinforced concrete, by studying four notch-to-depth ratios of 0, 0.08, 0.16, and 0.33. This was evaluated through 72 bending tests, using plain concrete (control) and fiber-reinforced concrete with volume fibers of 0.25% and 0.50%. Results showed that the specimens with a notch-to-depth ratio up to 0.33 are capable of attaining a hardening behavior. The study concludes that the increase in the dosage leads to an improvement in the residual performance, even though an increase in the notch-to-depth ratio has also occurred.
混凝土几乎不具备抗拉强度，且容易开裂，这会导致其使用寿命缩短。因此，找到一种有助于缓解这些缺点的补充材料具有重要意义。本研究的目的是通过研究0、0.08、0.16和0.33这四个缺口深度比，分析并实验确定添加钢纤维对纤维增强混凝土开裂后阶段性能的影响。通过72次弯曲试验进行了评估，试验使用了素混凝土（对照）以及体积纤维含量为0.25%和0.50%的纤维增强混凝土。结果表明，缺口深度比高达0.33的试件能够实现硬化行为。研究得出结论，尽管缺口深度比也有所增加，但剂量的增加会导致残余性能的改善。
