Flexural Behavior of Layered PVA Fiber/Steel Fiber Reinforced Cementitious Composite Plates

The use of synthetic fibers in fiber-reinforced concretes (FRCs) is often avoided due to the mistrust of lower performance at changing temperatures. This work examines the effect of moderate temperatures on the flexural strengths of FRCs. Two types of polypropylene fibers were tested, and one steel fiber was employed as a reference. Three-point bending tests were carried out following an adapted methodology based on the standard EN 14651. This adapted procedure included an insulation system that allowed the assessment of FRC flexural behavior after being exposed for two months at temperatures of 5, 20, 35 and 50 °C. In addition, the interaction of temperature with a pre-cracked state was also analyzed. To do this, several specimens were pre-cracked to 0.5 mm after 28 days and conditioned in their respective temperature until testing. The findings suggest that this range of moderate temperatures did not degrade the behavior of FRCs to a great extent since the analysis of variances showed that temperature is not always a significant factor; however, it did have an influence on the pre-cracked specimens at 35 and 50 °C.

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Effects of Manufacturing Techniques on the Flexural Behavior of Steel Fiber-Reinforced Concrete

Cement and Concrete Research ◽

10.1016/s0008-8846(97)00213-5 ◽

1998 ◽

Vol 28 (1) ◽

pp. 115-124 ◽

Cited By ~ 28

Author(s):

H Toutanji ◽

Z Bayasi

Keyword(s):

Reinforced Concrete ◽

Steel Fiber ◽

Fiber Reinforced Concrete ◽

Flexural Behavior ◽

Fiber Reinforced ◽

Steel Fiber Reinforced Concrete ◽

Manufacturing Techniques

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Effect of different PVA and steel fiber length and content on mechanical properties of CaCO3 whisker reinforced cementitious composites

Materiales de Construcción ◽

10.3989/mc.2019.12918 ◽

2019 ◽

Vol 69 (336) ◽

pp. 200 ◽

Cited By ~ 2

Author(s):

M. Cao ◽

C. Xie ◽

L. Li ◽

M. Khan

Keyword(s):

Mechanical Properties ◽

Crack Resistance ◽

Fiber Length ◽

Large Deflection ◽

Steel Fiber ◽

Flexural Behavior ◽

Cementitious Composites ◽

Hybrid Fiber ◽

Pva Fiber ◽

Fiber Reinforced Cementitious Composites

In this paper, calcium carbonate (CaCO3) whisker as a fiber reinforcement is mixed with steel and PVA fiber to form a multiscale hybrid fiber reinforced cementitious composites (MHFRCC). ASTM standard and post-crack strength techniques are performed to evaluate the mechanical properties of MHFRCC. The 1.25 % long steel fiber, 0.55 % short PVA fiber and 2.0 % CaCO3 whisker specimens showed the best flexural behavior before L/600 deflection. However, 1.5 % long steel fiber, 0.4 % long PVA fiber and 1.0 % CaCO3 whisker specimens presented better crack resistance after L/600 deflection. It is revealed that flexural parameters increase as comprehensive reinforcing index increase. The result showed that the CaCO3 whisker and short PVA fiber provided crack resistance effect at micro-scale and mainly play a dominate role in inhibiting micro-cracking. However, long steel fiber and long PVA fiber showed a better bridging effect of macro cracks at a large deflection.

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