Experimental Study on Flexural Toughness of Steel-Polypropylene Fiber Reinforced Concrete

2011 ◽  
Vol 261-263 ◽  
pp. 156-160 ◽  
Author(s):  
Zhi Gang Ren ◽  
Peng Tao Hu ◽  
You Zou
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Crack Resistance ◽  
Polypropylene Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Flexural Toughness ◽  
Macro Scale ◽  
Polypropylene Fiber Reinforced Concrete

The Steel-polypropylene fiber reinforced concrete take full advantage of steel fiber’s macro-scale crack resistance function on the concrete as well as the polypropylene fiber’s micro-scale crack resistance and toughening effect on the concrete matrix. In this paper, the three kinds of concrete specimens including plain high-strength concrete, steel fiber reinforced concrete and steel-polypropylene fiber concrete are selected for a flexural toughness experimental study, their compressive strength and deformation performance are analyzed, and their toughness index are investigated with ASTM-C1018 and PCS(post-crack strength) method. The results show that steel-polypropylene fiber reinforced concrete has better strength and toughness property as well as deformation performance.

scholarly journals Research on the Dynamic Mechanical Properties and Constitutive Models of Steel Fiber Reinforced Concrete and Polypropylene Fiber Reinforced Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Jie Huang ◽  
Yi Zhang ◽  
Yubin Tian ◽  
Hengheng Xiao ◽  
Jun Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Dynamic Mechanical Properties ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Dynamic Mechanical ◽  
Polypropylene Fiber Reinforced Concrete

This paper presents the results of an experimental research designed to investigate the dynamic mechanical properties and constitutive model of fiber reinforced concrete (FRC), including steel fiber reinforced concrete (SFRC) and polypropylene fiber reinforced concrete (PFRC) under fast loading. Experimental results are achieved by using the electrohydraulic servo loading test method, implying that the dynamic mechanical properties of PFRC and SFRC, such as peak stress, peak strain, and toughness, are positively affected by strain rate. The experimental elastic modulus test results of FRC with different fiber contents indicate that the elastic modulus is positively affected by polypropylene or steel fibers and increases with the increment of fiber content. Finally, the experimental stress-strain curves obtained in the MTS electrohydraulic servo system test are fitted by a damage dynamic constitutive model of FRC. The good fitting with experimental results proves that the model could be appropriate to describe the dynamic mechanical properties of FRC.

Experimental Study on Mechanical Properties of Steel and Polypropylene Fiber-Reinforced Concrete

2014 ◽  
Vol 584-586 ◽  
pp. 1355-1361 ◽  
Author(s):  
Liang Shan ◽  
Liang Zhang
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Volume Fraction ◽  
Polypropylene Fiber ◽  
Mechanical Tests ◽  
Fiber Reinforced Concrete ◽  
Test Results ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Polypropylene Fiber Reinforced Concrete

The mechanical tests of normal concrete (NC) specimens, steel fiber reinforced concrete (SFRC) specimens and polypropylene fiber reinforced concrete (PPFRC) specimens have been carried out. Fiber-reinforced concretes containing different volume fraction and aspect ratio of steel and polypropylene fibers were compared in terms of compressive, splitting tensile, ultimate tensile properties. Test results indicate that the mechanical properties of NC can be improved by addition of steel fibers and can be enhanced with the increase of fiber content. However, polypropylene fiber may cause opposite effect, if volume fraction too high.

Flexural Toughness of Hybrid Fiber Reinforced Concrete under Notched Beam Three-Point Bending

2014 ◽  
Vol 906 ◽  
pp. 311-317
Author(s):  
Si Hui Xiong ◽  
Dong Tao Xia ◽  
Xiang Kun Liu
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Fiber Reinforced Concrete ◽  
Test Method ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Flexural Toughness ◽  
Polypropylene Fiber Reinforced Concrete

In order to focus on hybrid fiber reinforced concrete flexural toughness,mixed 0.7% steel fiber/0.3% modified polypropylene fiber reinforced concrete, mixed 0.89% steel fiber/0.11% Dura fiber reinforced concrete were chosen to perform flexural toughness test. The test method is giving a central point load to the notched beam specimens (H*B*L1:150mm*150mm*550mm, h1*B1:2mm*25mm) with a 0.2 mm/min loading rate. The load we carry out should not stop until the mid span deflection is more than 3mm.Based on calculating the contribution of the fiber to the energy absorption value Dcr when the concrete cracking,the contribution of the fiber to the energy absorption value D1f when mid-span deflection is δ1,the contribution of the fiber to the energy absorption value D2f when mid-span deflection isδ2 and the equivalent flexural tensile strength feq1,feq2,the effect of the way use to hybrid fiber on the flexural toughness of concrete were investigated. The results shows that the hybrid fiber can significantly improve the flexural toughness of concrete, have favorable deformability and the ability to control crack. The result of 0.7% steel fiber/0.3% modified polypropylene fiber reinforced concrete is shown: Dcr=2185 Nmm,D1f=7634.26 Nmm,D2f=2198.67 Nmm, feq1=4.89 MPa,feq2=2.83 MPa, hence it shows the positive enhancement effect of hybrid fiber and flexural toughness increase significantly.

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