Behavior of concrete reinforced with polypropylene fiber exposed to high temperatures

Amâncio, Felipe Alves; Rafael, Maria Fabíola de Carvalho; Dias, Alisson Rodrigues de Oliveira; Cabral, Antônio Eduardo Bezerra

doi:10.1016/j.prostr.2018.11.013

Cited by 24 publications

(14 citation statements)

References 19 publications

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“…La inclusión de fibras de polipropileno evita el desconchado hasta una temperatura de 600°C, el cual se refiere a la ruptura de capas de concreto de la superficie cuando se expone a temperaturas altas y va en rápido aumento, pasado ese rango la adición de este solo actúa en la minimización de este fenómeno, el cual puede conducir a una pérdida temprana de la estabilidad e integridad de las estructuras (Alves et al, 2018).…”

Section: Fibrasunclassified

Comportamiento Térmico y Estructural del Concreto Expuesto a Altas Temperaturas: Una Revisión de la Literatura

Barboza

Monja

Pérez

2021

IRR

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ResumenLas altas temperaturas originadas por un incendio, ambientes de trabajo o uso, son conocidos por degradar gravemente a los materiales de construcción, siendo el concreto uno de los más utilizados, afectando así las propiedades mecánicas, físicas y químicas. Debido a la importancia del comportamiento del concreto a altas temperaturas, se han incrementado el estudio. Bajo este punto se revisaron 56 artículos indexados entre los años 2015 al 2020 los cuales se distribuyen de la siguiente manera: 21 artículos son de Scopus, 18 de Scielo y 17 de ScienceDirect sobre la influencia de la temperatura en parámetros como resistencia a la compresión, resistencia a la flexión, módulo de elasticidad, el desprendimiento del mismo, así como la influencia de tipos de agregados, aditivos y fibras. Concluyendo que la adición de ciertos componentes externo al concreto en la exposición a altas temperaturas puede ayudar a mejorar la resistencia a la compresión, como las fibras de acero, sin embargo, éstas no mitigan totalmente el daño en condiciones extremas.

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Section: Fibrasunclassified

Comportamiento Térmico y Estructural del Concreto Expuesto a Altas Temperaturas: Una Revisión de la Literatura

Barboza

Monja

Pérez

2021

IRR

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“…13. Also, the shaded area represents reported data for residual compressive strength of fibrous concrete done by other researchers [13,14,19,27,[38][39][40] (Fig. 13).…”

Section: Mechanical Degradation Of Rebar and Concrete Caused By Tempementioning

confidence: 99%

“…As for polymer fibers, although the advantages of using those in case of fire, spalling in particular, are undeniable [16][17][18], the effects on the mechanical properties are still a source of conflict. While some studies have indicated the presence of polypropylene fibers can enhance the mechanical properties of concrete at the elevated temperature [19][20][21], others showed, it has indiscernible or even adverse effects on the mechanical properties, whether in the ambient or high temperatures [16,22,23]. Pilya et al [24] showed, after 600 °C, PP fibers have no significant effect on the residual mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Role of macro fibers (steel and hybrid-synthetic) in the residual response of RC beams exposed to high temperatures

2020

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“…For instance, Xiao and Falkner [9] stated that PP fibers increase the relative residual compressive strength and decrease the residual flexural strength of concrete. Other authors [11] stated that the residual strength of concrete is not influenced by the inclusion of PP fibers when exposed to temperatures ranging from 200-800 • C. Kalifa [12] reported that these fibers demonstrated a beneficial influence on the residual strength of concrete after exposure to high temperatures.…”

Section: Introductionmentioning

confidence: 96%

Post-Fire Mechanical Properties of Concrete Reinforced with Spanish Broom Fibers

Juradin

Vranješ²,

Jozić

et al. 2021

J. Compos. Sci.

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In this study, we conducted an initial investigation of the post-fire mechanical properties of concrete reinforced with Spanish broom fibers. The mechanical properties were determined at room temperature, and the post-fire mechanical properties were determined at elevated temperature, so that the fire resistance of the concrete could be determined. Five mixtures were considered: three with differently treated Spanish broom fibers, a polypropylene fiber mixture, and a reference concrete mixture. The concrete and reinforced concrete samples were first dried to 100 °C, then heated to 400 °C, and left to cool to room temperature. The samples were tested immediately and 96 h after cooling. The compressive strength, weight loss, ultrasonic pulse velocity, and dynamic modulus of elasticity were determined and compared. The cross-sectional images of the concrete samples captured through an optical microscope were observed and analyzed. The changes in fiber structure were monitored by TG/DTG analysis. The results of the study indicate that even the reference concrete mixture did not have satisfactory residual properties. The reinforced concretes did not improve the residual properties of the reference concrete, but reduced the spalling and explosive failure performance under a compressive load. The concrete reinforced with Spanish broom fibers showed improved residual properties compared with concrete reinforced with polypropylene fibers.

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Behavior of concrete reinforced with polypropylene fiber exposed to high temperatures

Cited by 24 publications

References 19 publications

Comportamiento Térmico y Estructural del Concreto Expuesto a Altas Temperaturas: Una Revisión de la Literatura

Comportamiento Térmico y Estructural del Concreto Expuesto a Altas Temperaturas: Una Revisión de la Literatura

Role of macro fibers (steel and hybrid-synthetic) in the residual response of RC beams exposed to high temperatures

Post-Fire Mechanical Properties of Concrete Reinforced with Spanish Broom Fibers

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