Mala Avan Ahmed, Sherwani Aryan Far H, Younis Khaleel H, Faraj Rabar H, Mosavi Amir
Department of Civil Engineering, Gaziantep University, Gaziantep 27400, Turkey.
Department of Civil Engineering, Faculty of Engineering, Soran University, Soran 44008, Kurdistan Region, Iraq.
Materials (Basel). 2021 Apr 16;14(8):2016. doi: 10.3390/ma14082016.
An investigational study is conducted to examine the effects of different amounts of binders and curing methods on the mechanical behavior and ductility of Ultra-High Performance Fiber Reinforced Concretes (UHPFRCs) that contain 2% of Micro Steel Fiber (MSF). The aim is to find an optimum binder content for the UHPFRC mixes. The same water-to-binder ratio (w/b) of 0.12 was used for both water curing (WC) and steam curing (SC). Based on the curing methods, two series of eight mixes of UHPFRCs containing different binder contents ranging from 850 to 1200 kg/m with an increment of 50 kg/m were produced. Mechanical properties such as compressive strength, splitting tensile strength, static elastic module, flexural tensile strength and the ductility behavior were investigated. This study revealed that the mixture of 1150 kg/m binder content exhibited the highest values of the experimental results such as a compressive strength greater than 190 MPa, a splitting tensile strength greater than 12.5 MPa, and a modulus of elasticity higher than 45 GPa. The results also show that all of the improvements began to slightly decrease at 1200 kg/m of the binder content. On the other hand, it was concluded that SC resulted in higher mechanical performance and ductility behavior than WC.
进行了一项研究，以考察不同用量的粘结剂和养护方法对含2%微钢纤维（MSF）的超高性能纤维增强混凝土（UHPFRC）力学性能和延性的影响。目的是为UHPFRC混合料找到最佳粘结剂含量。水养护（WC）和蒸汽养护（SC）均采用相同的水胶比（w/b）0.12。基于养护方法，制备了两个系列的八组UHPFRC混合料，其粘结剂含量不同，范围为850至1200kg/m³，增量为50kg/m³。研究了抗压强度、劈裂抗拉强度、静态弹性模量、弯曲抗拉强度等力学性能以及延性行为。该研究表明，粘结剂含量为1150kg/m³的混合料在实验结果中表现出最高值，如抗压强度大于190MPa、劈裂抗拉强度大于12.5MPa以及弹性模量高于45GPa。结果还表明，在粘结剂含量为1200kg/m³时，所有性能的提升开始略有下降。另一方面，得出的结论是，蒸汽养护比水养护具有更高的力学性能和延性行为。
