Static and dynamic compressive properties of ultra-high performance concrete (UHPC) with hybrid steel fiber reinforcements

Wu, Zemei; Shi, Caijun; He, Wen; Wang, Dehui

doi:10.1016/j.cemconcomp.2017.02.010

Cited by 341 publications

(127 citation statements)

References 31 publications

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“…El porcentaje de fibras demostró tener gran importancia en los resultados, lo cual contradice los resultados mostrados por Hoang y Fehling [28]. Por otro lado, los resultados obtenidos en este estudio se asemejan a los alcanzados por la mayoría de los pesquisadores consultados, como por ejemplo Kahanji et al [29], Wu et al [30] y Alsalman et al [31].…”

Section: Discussionunclassified

“…Kahanji et al [29] alcanzaron 97,20 MPa usando 1% de fibra con curado de los especímenes en agua a 20°C y 154,60 MPa con curado en agua a 90°C, ambas por 7 días y posteriormente todos los especímenes fueron almacenados en sala húmeda hasta el día de la prueba. WU et al [30] fabricaron una mezcla de concreto sin fibras y cinco mezclas con fibras para evaluar las propiedades estáticas y dinámicas del concreto sometido a compresión, alcanzando 98,30 y 143,6 MPa respectivamente. Alsalman et al [31] alcanzaron una resistencia a la compresión máxima de 118,6 MPa en especímenes sin fibras y sin tratamiento térmico en el curado, usando materiales comerciales locales, también trabajaron con especímenes incluyendo tratamiento térmico en el curado, alcanzando 127,38 MPa sin fibras y 157,46 MPa con fibras.…”

Section: Revisión Bibliográficaunclassified

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Investigación de diseños de mezcla para producir Ultra High Performance Fiber Reinforced Concrete (UHPFRC) usando ANOVA

Aguero¹,

Korzenowski²,

Aguirre³

et al. 2019

Matéria (Rio J.)

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RESUMENSe presenta un estudio experimental para producir Ultra High Performance Fiber Reinforced Concrete (UHFPRC) incluyendo residuos industriales en la mezcla y determinar la resistencia a la compresión promedio. El estudio incluye arreglos factoriales para realizar análisis de varianza usando ANOVA. Los factores controlables fueron: (i) edad de la muestra; (ii) granulometría de la escoria; (iii) diseños de mezcla; (iv) porcentajes de fibras y (iv) tipo de curado. Los mayores valores de resistencia obtenidos fueron 138.12, 132.17, y 155.29 MPa, con sustituciones parciales de cemento por residuos industriales del 35, 25 y 26% respectivamente. Los diseños de mezcla fueron fabricados aplicando un procedimiento simple, usando en la mezcla materiales como cemento, humo de sílice, escoria de alto horno, polvo de cuarzo y arena fina producidos en Brasil. También se adiciona el superplastificante diluido en agua y las fibras, las cuales se incorporan cuando la mezcla se convierte en una densa masa plástica. Los resultados demostraron que todos los factores controlables tienen influencia significativa en la variable de respuesta y que la probabilidad de que las variaciones en la resistencia sean atribuidas al error experimental es menor al 1‰.Palabras-clave: UHPFRC, sustentable, resistencia a la compresión, ANOVA. ABSTRACTAn experimental study is presented to produce Ultra High Performance Fiber Reinforced Concrete (UHPFRC) including industrial waste in the mix, and determine the average compressive strength. The study includes factor arrangements to perform analysis of variance using ANOVA. The controllable factors were: (i) age of the sample; (ii) granulometry of the slag; (iii) mix designs; (iv) percentages of fibers and (iv) thermal treatment in curing. The highest resistance values obtained were 138.12, 132.17 and 155.29 MPa, with partial substitutions of cement by industrial waste of 35, 25 and 26% respectively. The mixing designs were manufactured using a simple procedure, using materials such as cement, silica fume, blast furnace slag, quartz powder and fine sand produced in Brazil. Also, the mixture includes the superplasticizer diluted in water and the fibers, which are incorporated when the mixture becomes a dense plastic mass. The results showed that all the controllable factors have significant influence on the response variable, and that the probability that the variations in resistance are attributed to the experimental error is less than 1 ‰.

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Section: Discussionunclassified

Section: Revisión Bibliográficaunclassified

Investigación de diseños de mezcla para producir Ultra High Performance Fiber Reinforced Concrete (UHPFRC) usando ANOVA

Aguero¹,

Korzenowski²,

Aguirre³

et al. 2019

Matéria (Rio J.)

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“…It can be observed from the previous experimental studies of steel and metallic fibers [7][8][9][10][11][12][13][14], natural fibers [15] and polymetric fibers [16][17][18] that the incorporation of single type of fibers in concrete does not significantly influence the various characteristics of concrete except strain and crack resistance, while the incorporation of hybrid fibers effectively increase the resistance to cracking and strain efficiency in several levels [19,20]. To improve the ductility, bridge the cracks and prevent their propagation in the concrete, the addition of fibers is an effective way [21].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical behavior of hybrid-fiber-reinforced concrete compression members under concentric loading

Raza

Khan

2020

SN Appl. Sci.

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The modern research is aimed to enhance the tensile properties of concrete so that its performance should be made better in various reinforced concrete structures. In the current study, twenty hybrid-fiber-reinforced concrete (HFRC) columns and one plain concrete column were cast to examine the effect of hybrid fibers on the axial capacity, load-deflection response and cracking patterns of columns under axial concentric loading. All specimens were square in cross section having a side length of 150 mm and a height of 1200 mm. Two different types of fibers were used; one is steel fibers (SF) and second is polypropylene fibers (PPF). Four different volumetric ratios of SF (0.7%, 0.8%, 0.9%, 1.0%) and five different ratios of PPF (0.1%, 0.3%, 0.5%, 0.7%, 0.9%) were used in the current study. The results indicate that the combination of 0.8% SF and 0.5% PPF performed well for load-carrying capacity and a combination of 0.9% SF and 0.3% PPF presented the best performance for the ductility of HFRC columns. Moreover, a constitutive finite element model (FEM) was proposed using concrete damaged plastic (CDP) model in ABAQUS for predicting the axial behavior and crack patterns of HFRC columns under concentric loading. A close agreement was observed between the experimental measurements and FE predictions. Finally, a detailed comparison of theoretical axial capacities of HFRC columns was performed using the predictions of various codes and proposed equations.

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“…Information derived provides insights also for research on modern composite materials such as high performing steel fiber reinforced concrete (SFRC). In fact inclusion of fibers in cement mixtures is still not a standardized procedure and randomness on the properties according to geometry of fibers and interactions with matrices after inclusion is sometimes observed in literature [7]. Furthermore, concrete reinforced using natural fibers have been tested in recent years to reduce environmental impact inherent current building industry [8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic characterization of adobe in compression: the effect of fibre fraction in soil matrix

Piani¹,

Weerheijm²,

Peroni³

et al. 2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Adobe is one of the most ancient forms of masonry. Adobe bricks are sundried mixtures of clay, silt, sand and natural fibres locally available joined together using mud mortar. Adobe structures are largely spread in areas of the world prone to earthquakes or involved in military conflicts. Unfortunately, almost no literature concerns the dynamic assessment of soil-based masonry components. From earlier research, it was derived that the mechanical behaviour of adobe in statics fits in the class of quasi brittle materials. Its resemblance with cementitious materials concerns the main failure modes and the constitutive models in compression. This study deals with the experimental characterization of adobe components response in dynamics. It is aimed to study and quantify the rate sensitivity of adobe material from bricks at a wide range of strain rates, from statics up to impact conditions. In particular, the influence of fiber reinforcement in the mixture on the mechanical behaviour of the material has been addressed. Adobe bricks are commonly mixed using organic content locally available in the field, from straw to chopped wood. Fibres are added to prevent shrinkage cracks during the air drying process. In modern materials such as concrete, inclusion of artificial fibres is originally meant to enhance the mechanical performance of the material, benefiting from the selective properties of reinforcement and binder. An experimental campaign was carried out in a collaboration between Delft University of Technology, Dutch Ministry of Defence, TNO and the Joint Research Centre (JRC) of the European Commission. Two types of bricks were tested. They both had the same soil composition in terms of mineralogical family and soil elements proportions but only one was mixed using straw and wood. Cylindrical samples were subjected to compression tests at different rates of loadings in compression: low (˙ 1 = 3 10 −4 s −1), intermediate (˙ 2 = 3 s −1) and high (˙ 3 = 120 s −1). High strain rate tests were performed using the split Hopkinson bar of the Elsa-HopLab (JRC). For each test, high resolution videos registered the failure process and force-displacement plots were

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Static and dynamic compressive properties of ultra-high performance concrete (UHPC) with hybrid steel fiber reinforcements

Cited by 341 publications

References 31 publications

Investigación de diseños de mezcla para producir Ultra High Performance Fiber Reinforced Concrete (UHPFRC) usando ANOVA

Investigación de diseños de mezcla para producir Ultra High Performance Fiber Reinforced Concrete (UHPFRC) usando ANOVA

Experimental and numerical behavior of hybrid-fiber-reinforced concrete compression members under concentric loading

Dynamic characterization of adobe in compression: the effect of fibre fraction in soil matrix

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