Combined effect of coarse aggregate and fiber on tensile behavior of ultra-high performance concrete

Liu, Jianzhong; Han, Fangyu; Gong, Chenchen; Zhang, Qianqian; Jin, Lihua; Zhang, Lihui; Yang, Zhiqian

doi:10.1016/j.conbuildmat.2016.05.039

Cited by 176 publications

(51 citation statements)

References 35 publications

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“…Then, specimens were cast for the pullout test of multiple fibres, similarly to the described in [10], [14] and [44]. A thin polyethylene plastic sheet with dimensions 40x40x0.5 mm was pierced with evenly spaced holes forming a 5 by 5 grid.…”

Section: Uhpfrc With the Composition Frommentioning

confidence: 99%

“…Since the tensile failure of UHPFRC is governed by the bond between fibre and matrix, attempts to enhance the mechanical performance of the material in tension often focus on improving the interfacial properties through modifications of the matrix composition or of the fibre geometry [12][13][14]. Few studies have addressed this issue by means of surface treatments applied to the surface of metallic fibres, prior to their mixing with concrete.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-high performance fibre-reinforced cementitious composite with steel microfibres functionalized with silane

Casagrande

Cavalaro

Repette

2018

Construction and Building Materials

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This paper explores the effect of fibre functionalization with tetraethoxysilane (TEOS) in the microstructure and mechanical property of ultra-high performance cement composites with steel fibres. Fibres treated with three concentrations of TEOS were evaluated by pullout tests and SEM/EDS analysis. Mixes with treated fibres showed up to 35.6% increase in bond strength and up to 49.5% reduction in the crack opening at the peak pullout load in comparison with

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Section: Uhpfrc With the Composition Frommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-high performance fibre-reinforced cementitious composite with steel microfibres functionalized with silane

Casagrande

Cavalaro

Repette

2018

Construction and Building Materials

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“…UHPC (ultrahigh-performance concrete) is a generic term for a class of advanced cementitious composite materials that reflects excellent strength, stiffness, ductility, and energy dissipation, and these allow more economic and long-life structures than the conventional concrete even without accounting for the increase in structural durability [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios

Feng

Wang

et al. 2019

Advances in Materials Science and Engineering

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This paper presents an experimental study on the flexural behavior of an innovative CA-UHPC (ultrahigh-performance concrete containing coarse aggregate) slab with high and low reinforcement ratios. A total of eighteen CA-UHPC slabs were tested to failure under the parameters of longitudinal reinforcement ratio, curing method, and maximum aggregate size. Test results indicated that sufficient longitudinal reinforcement should be embedded to prevent the brittle failure and disastrous damage. High ductile failure mode was observed for specimens with high reinforcement ratio compared with specimens with low reinforcement ratio. Instead of extensively crushing as normal strength concrete, delamination failure appeared in the compression zone of the CA-UHPC slabs owing to the fibers’ bridging effect, the yielding of longitudinal reinforcement, and the large expansion of flexural cracks which led to the final failure. The reinforced CA-UHPC slabs demonstrated excellent deformability, and ultimate ratio of deflection to span increased from 1/281 to 1/12 when the reinforcement ratio raised from 0% to 3.45%. Stiffness of the reinforced specimens at the flexural cracking state was about 88% and only approximately 6% at the ultimate state, but nearly 50% of the initial stiffness remained when the longitudinal reinforcements yielded, which indicated superior load resistance ability and excellent postcracking deformability. A new ductility index was proposed to evaluate the postcracking ductility of the CA-UHPC specimens. Finally, test results were compared with the flexural strength predictions of CECS 38-2004, ACI 544.4R, and BS EN 1992.

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“…LIU et al [25] agregaron a la mistura de concreto basalto triturado como agregado grueso con diámetros entre 5 a 20 mm y arena de rio con tamaño máximo de 5 mm, alcanzaron una resistencia a la compresión de 99,70 MPa sin fibras y 143,6 MPa usando 2,5% de fibras cortas de acero en probetas cúbicas de 100 mm de lado; trabajaron con una relación a/a de 0,18 y variaron las cantidades de agregado grueso, superplastificante y fibras de acero. KANG et al [26] investigaron la resistencia a la compresión en probetas cúbicas de 50 mm de lado usando como materiales aglomerantes el cemento y el humo de sílice de zirconio, usaron también aditivos para reducir la retracción autógena, fibras de acero y fibras híbridas; la mayor resistencia en los especímenes híbridos fue obtenida combinando 1,5% de fibras de acero con 0,5% de fibras de polivinilo, obteniendo en ese caso 147,49 MPa.…”

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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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Combined effect of coarse aggregate and fiber on tensile behavior of ultra-high performance concrete

Cited by 176 publications

References 35 publications

Ultra-high performance fibre-reinforced cementitious composite with steel microfibres functionalized with silane

Ultra-high performance fibre-reinforced cementitious composite with steel microfibres functionalized with silane

Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios

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

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