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Effect of elevated temperature exposure on the flexural behavior of steel–polypropylene hybrid fiber-reinforced concrete
This paper contributes to the understanding of the effect presented by steel and polypropylene (PP) fibers on the flexural behavior of fibered-reinforced concrete (FRC) exposed to temperatures of up to 800 °C. FRC specimens with a water–cement ratio of 0.48, total fiber volume fraction of 1.2%, and five different steel–PP fiber ratios (1.2:0, 0.9:0.3, 0.6:0.6, 0.3:0.9, and 0:1.2) were analyzed for post-heating flexural stiffness, strength, toughness, crack width, and ultrasonic pulse velocity (UPV). The residual flexural strength and toughness increased with an increase in the volume fraction of the steel fibers. However, the residual strength fraction was affected significantly only by the exposure temperature with the average values of all FRC mixtures of 0.75 and 0.48 at 400 and 600 °C, respectively. The incorporation of steel and PP fibers significantly decreased the loss rate in toughness and increased thermal crack resistance, particularly below 400 and 600 °C, respectively. Compared with the mixture with only steel fibers, the incorporation of 0.3% steel and 0.9% PP fibers increased the residual toughness fraction from 0.59 to 0.92 at 400 °C and lowered the maximum crack width by 46% at 600°C. Additionally, the UPV exhibited strong relationships with the exposure temperature and residual strength fraction regardless of variations in the fiber mixtures. This can be used to evaluate damage to single-fiber-type and hybrid FRC with various fiber contents.
Effect of elevated temperature exposure on the flexural behavior of steel–polypropylene hybrid fiber-reinforced concrete
This paper contributes to the understanding of the effect presented by steel and polypropylene (PP) fibers on the flexural behavior of fibered-reinforced concrete (FRC) exposed to temperatures of up to 800 °C. FRC specimens with a water–cement ratio of 0.48, total fiber volume fraction of 1.2%, and five different steel–PP fiber ratios (1.2:0, 0.9:0.3, 0.6:0.6, 0.3:0.9, and 0:1.2) were analyzed for post-heating flexural stiffness, strength, toughness, crack width, and ultrasonic pulse velocity (UPV). The residual flexural strength and toughness increased with an increase in the volume fraction of the steel fibers. However, the residual strength fraction was affected significantly only by the exposure temperature with the average values of all FRC mixtures of 0.75 and 0.48 at 400 and 600 °C, respectively. The incorporation of steel and PP fibers significantly decreased the loss rate in toughness and increased thermal crack resistance, particularly below 400 and 600 °C, respectively. Compared with the mixture with only steel fibers, the incorporation of 0.3% steel and 0.9% PP fibers increased the residual toughness fraction from 0.59 to 0.92 at 400 °C and lowered the maximum crack width by 46% at 600°C. Additionally, the UPV exhibited strong relationships with the exposure temperature and residual strength fraction regardless of variations in the fiber mixtures. This can be used to evaluate damage to single-fiber-type and hybrid FRC with various fiber contents.
Effect of elevated temperature exposure on the flexural behavior of steel–polypropylene hybrid fiber-reinforced concrete
Mater Struct
Suwanvitaya, Prae (author) / Chotickai, Piya (author)
2024-04-01
Article (Journal)
Electronic Resource
English
Effect of Exposure to Elevated Temperature on Polypropylene Fiber-Reinforced Concrete
| British Library Online Contents | 2002
Effect of Exposure to Elevated Temperature on Polypropylene Fiber-Reinforced Concrete
| Online Contents | 2002