Influence of Fiber Shape and Volume Content on the Performance of Reactive Powder Concrete (RPC)

被引:8
|
作者
Wang, Chuanlin [1 ,2 ]
Xue, Guojie [1 ]
Zhao, Xianbo [3 ]
机构
[1] Shantou Univ, Dept Civil & Engn, Shantou 515063, Peoples R China
[2] Guangdong Engn Ctr Struct Safety & Hlth Monitorin, Shantou 515063, Peoples R China
[3] Cent Queensland Univ, Sch Engn & Technol, Sydney, NSW 2000, Australia
关键词
steel-fiber-reinforced RPC; open steel fiber; closed steel fiber; improvement mechanism; fiber hybrid; COMPARATIVE FLEXURAL BEHAVIOR; REINFORCED-CONCRETE; STEEL FIBERS; MECHANICAL-PROPERTIES; PULLOUT BEHAVIOR; ENERGY-DISSIPATION; TENSILE BEHAVIOR; STRENGTH; MACRO; RATIO;
D O I
10.3390/buildings11070286
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This research studied the influence of three types of open (short-straight, long-straight, semicircular) and three different shapes of closed steel fibers (triangular, rectangular, circular) with different fiber contents by volume (0, 0.5%, 1%, 1.5%, and 2%) on the working and mechanical performance of reactive powder concrete (RPC). The results indicated that (1) the number of steel fibers and the enclosed area formed by closed steel fibers would remarkably impact the performance of RPC; (2) the semicircular fiber improves RPC's strength the most among the three open shapes; (3) the short-straight fiber works more effectively than the closed steel fibers; (4) the circular fiber works the most efficiently in improving RPC's mechanical performance while the triangular ones have the least effect among the three closed steel fibers; (5) both the closed and open steel fibers improve their compressive strength more than their flexural strength; (6) the closed steel fiber works more efficiently in improving the flexural strength but less efficiently in improving the compressive strength; (7) the open steel fibers enhance the mechanical performance of RPC via their anchoring performance while the closed steel fibers work by confining the concrete; (8) the hybrid utilization of steel fibers improves RPC's mechanical performance to a higher level via combing the advantages of open and closed steel fibers.
引用
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页数:19
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