Reinforcement Effects on Tensile Behavior of Ultra-High-Performance Concrete (UHPC) with Low Steel Fiber Volume Fractions

被引:3
作者
Luo, Xianzhi [1 ]
Zhang, Sumei [1 ,2 ]
Li, Aidong [3 ]
Zhang, Chenming [3 ]
Zhang, Yuchen [1 ]
机构
[1] Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
[2] Guangdong Prov Key Lab Intelligent & Resilient Str, Shenzhen 518055, Peoples R China
[3] China Railway Design Corp, Tianjin 300308, Peoples R China
基金
中国国家自然科学基金;
关键词
ultra-high-performance concrete (UHPC); fiber volume fraction; rebar; ductility; cracking behavior; direct tensile test; digital image correlation (DIC); MECHANICAL-PROPERTIES; AGGREGATE; UHPFRC;
D O I
10.3390/ma17102418
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ultra-high-performance concrete (UHPC) with a low steel fiber volume fraction offers lower material costs than UHPC with typical steel fiber volume fractions, and has the potential to mitigate the ductility degradation of rebar-reinforced UHPC (R-UHPC). This study explores the reinforcement effect on the tensile behavior of UHPC with a low fiber volume fraction with the aim of facilitating more cost-efficient UHPC applications. The axial tensile behavior of 30 UHPC specimens with low fiber volume fractions at different reinforcement ratios was tested through direct tensile tests. The findings indicate that adopting UHPC with a low fiber volume fraction can significantly mitigate the ductility deterioration of rebar-reinforced UHPC (R-UHPC), and both increasing the reinforcement ratio and decreasing the fiber volume fraction contribute to the improvement in ductility. The failure modes of R-UHPC are determined by the ratio of reinforcement ratio and fiber volume fraction, rather than a single parameter, which also means that R-UHPC with different parameters may correspond to different methods to predict tensile load-bearing capacity. For UHPC with a fiber volume fraction low to 0.5%, incorporating steel rebars gives superior multi-crack cracking behavior and excellent capacity to restrict the maximum crack width. Increasing the fiber volume fraction from 0.5% to 1.0% at the same reinforcement ratio will yield little benefit other than an increase in tensile load-bearing capacity.
引用
收藏
页数:25
相关论文
共 50 条
[1]   Exploring mechanical and durability properties of ultra-high performance concrete incorporating various steel fiber lengths and dosages [J].
Abbas, Safeer ;
Soliman, Ahmed M. ;
Nehdi, Moncef L. .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 75 :429-441
[2]   Developing Ultra-High-Performance Fiber-Reinforced Concrete for Large-Scale Structural Applications [J].
Aghdasi, Parham ;
Heid, Ashley E. ;
Chao, Shih-Ho .
ACI MATERIALS JOURNAL, 2016, 113 (05) :559-570
[3]   Effect of hybridization of straight and hooked steel fibers and curing methods on the key mechanical properties of UHPC [J].
Al-Osta, Mohammed A. ;
Sharif, Abdulrahman Mohammed ;
Ahmad, Shamsad ;
Adekunle, Saheed Kolawole ;
Al-Huri, Mohammed ;
Sharif, Abdulla Mohammed .
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2021, 15 :3222-3239
[4]  
[Anonymous], 2021, Metallic materials-Tensile TestingPart 1: Method of Test at Room Temperature
[5]   A review of engineering properties of ultra-high-performance geopolymer concrete [J].
Bahmani, Hadi ;
Mostofinejad, Davood .
DEVELOPMENTS IN THE BUILT ENVIRONMENT, 2023, 14
[6]   Mechanical and damage mechanisms of reinforced ultra high performance concrete under tensile loading [J].
Bian, Chen ;
Wang, Jun-Yan .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 226 :259-279
[7]   Optimizing flexural cracking process of ultra-high performance concrete via incorporating microscale steel wires [J].
Dong, Sufen ;
Wang, Dongyu ;
Wang, Xinyue ;
D'Alessandro, Antonella ;
Ding, Siqi ;
Han, Baoguo ;
Ou, Jinping .
CEMENT & CONCRETE COMPOSITES, 2022, 134
[8]   Utilization of fibers in ultra-high performance concrete: A review [J].
Gong, Jihao ;
Ma, Yuwei ;
Fu, Jiyang ;
Hu, Jie ;
Ouyang, Xiaowei ;
Zhang, Zuhua ;
Wang, Hao .
COMPOSITES PART B-ENGINEERING, 2022, 241
[9]   Synergistic tensile response of reinforced ultra high performance concrete with low fiber contents [J].
Guo, Jun -Yuan ;
Wang, Jun-Yan ;
Bian, Chen .
CASE STUDIES IN CONSTRUCTION MATERIALS, 2022, 17
[10]   Tensile response of UHPFRC under very low strain rates and low temperatures [J].
Hafiz, Mohamed Abdul ;
Denari, Emmanuel .
CEMENT AND CONCRETE RESEARCH, 2020, 133