Experimental Study of the Basic Mechanical Properties of Directionally Distributed Steel Fibre-Reinforced Concrete

Fang-Yuan Li; Cheng-Yuan Cao; Yun-Xuan Cui; Pei-Feng Wu

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Experimental Study of the Basic Mechanical Properties of Directionally Distributed Steel Fibre-Reinforced Concrete

机译：定向分布钢纤维混凝土基本力学性能的试验研究

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Directionally distributed steel fibre-reinforced concrete (SFRC) cannot be widely applied due to the limitations of current construction technology, which hinders research on its mechanical properties. With the development of new construction technologies, such as self-compacting concrete or 3D printing, directionally distributed SFRC has found new developmental opportunities. This study tested, compared, and analysed the basic mechanical properties of ordinary concrete, randomly distributed SFRC, and directionally distributed SFRC. The differences between the damage patterns parallel and perpendicular to the direction of the steel fibres were evaluated in directionally distributed SFRC. When the fibre volume fraction is high and the compression is applied perpendicular to the fibre direction, as the loading increases, the transverse deformation of the specimen is constrained by the fibres. When the compression is applied parallel to the fibre direction, the fibre cannot effectively constrain the transverse deformation of the specimens. When the volume fraction of directionally distributed steel fibres was 1.6%, the elastic modulus of the directionally distributed steel fibres was 39% higher than that of ordinary concrete. Comparison of the experimental values of the elastic modulus with those estimated by existing calculation methods revealed that a modification of the current calculation theories may be required to calculate the changes in the elastic modulus of directionally distributed SFRC with a high volume fraction of steel fibres.

机译：由于目前施工技术的局限性，定向分布的钢纤维增强混凝土（SFRC）无法广泛应用，从而阻碍了其力学性能的研究。随着新技术的发展，例如自密实混凝土或3D打印，定向分布的SFRC已发现新的发展机会。这项研究测试，比较和分析了普通混凝土，随机分布的SFRC和定向分布的SFRC的基本力学性能。在有向分布的SFRC中评估了平行于和垂直于钢纤维方向的损伤模式之间的差异。当纤维体积分数高且垂直于纤维方向施加压缩力时，随着载荷的增加，样品的横向变形会受到纤维的限制。当平行于纤维方向施加压缩时，纤维不能有效地限制样品的横向变形。当定向分布的钢纤维的体积分数为1.6％时，定向分布的钢纤维的弹性模量比普通混凝土高39％。通过将弹性模量的实验值与通过现有计算方法估算的值进行比较，发现可能需要对当前的计算理论进行修改，以计算出具有高体积分数的钢纤维的定向分布SFRC的弹性模量的变化。

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《Advances in materials science and engineering》 |2018年第4期|共页
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Fang-Yuan Li; Cheng-Yuan Cao; Yun-Xuan Cui; Pei-Feng Wu;
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1. Experimental study of the tensile and flexural mechanical properties of directionally distributed steel fibre-reinforced concrete [J] . Li Fangyuan, Cui Yunxuan, Cao Chengyuan, Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application . 2019,第9期

机译：定向分布钢纤维混凝土拉伸和弯曲力学性能的试验研究
2. Experimental study of the tensile and flexural mechanical properties of directionally distributed steel fibre-reinforced concrete [J] . Li Fangyuan, Cui Yunxuan, Cao Chengyuan, Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application . 2019,第9期

机译：方向分布钢纤维钢筋混凝土拉伸和弯曲力学性能的实验研究
3. The experimental investigation of the mechanical properties of steel fibre-reinforced concrete according to different testing standards [J] . A. Ryabchikov, M. Kiviste, S.-M. Udras, Agronomy Research . 2020,第1期

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4. Properties of Normal Concrete, Self-Compacting Concrete and Glass Fibre-reinforced Self-Compacting Concrete: An Experimental Study [C] . Subhan Ahmad, Arshad Umar, Amjad Masood International Symposium on Plasticity and Impact Mechanics . 2017

机译：普通混凝土，自整体混凝土和玻璃纤维增强自压实混凝土的性能：实验研究
5. Experimental and Theoretical Studies on Mechanical Properties of Complex Oxides in Concrete. [D] . Moon, Juhyuk. 2013

机译：混凝土中复合氧化物力学性能的实验和理论研究。
6. Experimental Study on Basic Mechanical Properties of Basalt Fiber Reinforced Concrete [O] . Hao Zhou, Bin Jia, Hui Huang, 2020

机译：玄武岩纤维混凝土基本力学性能的试验研究
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Experimental Study of the Basic Mechanical Properties of Directionally Distributed Steel Fibre-Reinforced Concrete

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