Strain hardening ultra-high performance fiber reinforced cementitious composites: Effect of fiber type and concentration
Strain hardening ultra-high performance fiber reinforced cementitious composites: Effect of fiber type and concentration
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DOI：
10.1016/j.compositesb.2016.08.004
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发表时间：
2016-10-15
影响因子：
13.1
通讯作者：
Asaad, Diler Sabah
中科院分区：
文献类型：
--
作者：
Gesoglu, Mehmet;Guneyisi, Erhan;Asaad, Diler Sabah
通过实验研究了微钢、挂钩钢和微玻璃纤维对超高性能胶凝复合材料（UHPC）力学性能和延展性的影响。微钢纤维、钩钢纤维和微玻璃纤维的纵横比分别为717、55和722。在水胶比为0.195的条件下，制备了三组纤维体积分数分别为0.25、0.5、0.75、1、1.5和2%的uhpc，并对其抗压强度、劈裂抗拉强度、弹性模量、抗弯强度、载荷-位移性能、断裂能和特征长度进行了测试。试验结果表明，添加2%微钢纤维的混合料抗压强度最高，为180 MPa，劈裂抗拉强度和弹性模量最高。然而，含有2%钩状钢纤维的混合料表现出应变硬化载荷-位移行为，延性显著增强。结果还表明，在纤维体积的1.5%之后，使用微玻璃纤维的有益影响开始下降。(C) 2016 Elsevier Ltd.版权所有。
An experimental work was carried out to investigate the effects of micro-steel, hooked-steel, and micro glass fibers on the mechanical properties and ductility of Ultra-high Performance Cementitious Composites (UHPC). The aspect ratios of the of micro-steel, hooked-steel, and micro-glass fibers were 717, 55 and 722, respectively. At a water-binder ratio of 0.195, three groups of UHPCs containing 0.25, 0.5, 0.75, 1, 1.5, and 2% fiber volume fractions were produced and tested for compressive strength, splitting tensile strength, modulus of elasticity, flexural strength, load-displacement behavior, fracture energy, and characteristic length. Test results revealed that the mixes with 2% of micro steel fiber exhibited the best compressive strength of 180 MPa as well as the highest splitting tensile strength and modulus of elasticity. However, the mixes with 2% of hooked steel fiber displayed a strain hardening load-displacement behavior with a substantially enhanced ductility. The results also showed that the beneficial influence of using micro glass fiber began to decrease after 1.5% of the fiber volume. (C) 2016 Elsevier Ltd. All rights reserved.