Generalization of the Barcelona test for the toughness control of FRC

Malatesta, Sergio Carmona; de, Antonio Aguado; Molins, Climent

doi:10.1617/s11527-011-9816-8

Cited by 40 publications

(23 citation statements)

References 7 publications

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“…Two to four cracks usually appear during the BCN test [39], although one displays bigger opening than the others. The angle θ R between the direction of the wider crack and the i-axis of the local coordinated system was also measured (See Fig.…”

Section: Residual Tensile Strength Evaluationmentioning

confidence: 99%

Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete

et al. 2018

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Sprayed, steel fibre reinforced concrete (SSFRC) is a material that tends to present anisotropy. The shearing conditions of the spraying process induce preferential fibre orientation. Despite the extensive use of the material, no study has been found about the assessment of fibre distribution and its influence on the residual tensile strength of SSFRC. The objective of this work is to address such issue from a quantitative standpoint. An experimental program was performed with specimens extracted from different directions within a SSFRC panel. The fibre content and 3D orientation were quantified for each specimen using the inductive method. Then, the tensile behaviour was indirectly assessed for the same specimen through the Barcelona test. Results confirm the high level of anisotropy of SSFRC. The fibre orientation number parallel to the spraying direction is 3 times bigger than that found in the perpendicular direction. Similar differences were observed between the residual tensile response measured in those directions. Comparison of test results suggest that the preferential fibre orientation creates weaker planes that favours the increase of crack opening at lower load levels.

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Section: Residual Tensile Strength Evaluationmentioning

confidence: 99%

Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete

et al. 2018

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“…As for the input parameters, some assumptions and approximations were introduced, due to unavailable experimental measurements. The dilation angle , in the CDP model, was adopted to be 30° [28], being the lower value of the typical range 30°-45°. The remaining set of CDP parameters was assumed as suggested in [22], that is, flow potential eccentricity , the ratio of initial equibiaxial compressive yield stress to initial uniaxial compressive yield stress , the ratio of the second stress invariant on the tensile meridian to that on the compressive meridian , and viscosity parameter .…”

Section: Curingmentioning

confidence: 99%

Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Carvelli

Veljkovic

Nguyen

et al. 2020

Cement and Concrete Composites

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This study evaluates the effects of the manufacturing process and fiber reinforcement on low-velocity impact response of the recently developed PVA fiber-reinforced alkali-activated stone wool composites. To this end, reinforced and unreinforced specimens manufactured by hot-pressing were compared with those oven curing. The results revealed a similar impact response for the hot-pressed composite produced at 120 ° C for 3 h and its counterpart cured at ambient pressure at 60 ° C oven for 24 h. Furthermore, fiber reinforcement significantly improves the impact resistance of the hot-pressed composites showing about a 50% increase in peak load and a 40% reduction in penetration compared to the unreinforced materials. In view of the development of the hot-pressed composites and potential applications, accurate predictive models are of extremely importance, hence the material mechanical behavior was here simulated by adopting the concrete damage plasticity model to predict the low-velocity impact response of both unreinforced and reinforced materials and successfully verified for the scaling-up purpose.

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“…Estos tuvieron éxito en campos de aplicación específicos como el revestimiento de túneles y la reparación de pavimentos o tableros de puentes, que cada vez adquieren mayor vigencia. [2] [14].…”

Section: Antecedentes Históricosunclassified

Determinación de cantidad óptima de Fibra de Acero para la elaboración de Hormigón de Cemento Portland para losas de Pavimentos Rígidos

Orozco¹,

Montes²,

Chavez³

et al. 2019

Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation

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El hormigón aplicado en losas de pavimentos rígidos con módulo de rotura de 4,5 MPa con adición de fibras de acero ha obtenido un importante prestigio por su gran desempeño frente a requisitos cada vez más exigentes del sector de la construcción. El Hormigón Reforzado con Fibra de Acero (HRFA), no es más que hormigón hecho a partir de cementos hidráulicos, áridos finos, áridos gruesos, agua, aditivos y fibras discretas discontinuas (Dramix 80/60), que conlleva a mejoras en el comportamiento físicomecánico. El presente trabajo ha considerado las características tanto del hormigón como de las fibras, y se basará en los lineamientos de las normas nacionales MTOP 2002, NEVI 12, INEN e internacionales ASTM, ACI. Su caracterización experimental se basa en determinar una resistencia de concreto específica (f'c= 350 kg/cm2) con tamaño máximo nominal de agregado 3/4" y adición de fibra (Dramix 80/60) en probetas cilíndricas y prismáticas (viga), con el objetivo de comprobar el comportamiento físico-mecánico de estos elementos.Para la ejecución del muestreo se realizó 15 especímenes con diferentes cantidades de adición (5, 10, 20, 30, 40) Kg. de fibras Dramix 80/60. Para la propuesta de la dosificación del hormigón, se analiza las diferentes metodologías de diseño como indica la norma ACI, además mediante investigación bibliográfica y experimental, se comprobará la eficiencia en el uso del HRFA.

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Generalization of the Barcelona test for the toughness control of FRC

Cited by 40 publications

References 7 publications

Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete

Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete

Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Determinación de cantidad óptima de Fibra de Acero para la elaboración de Hormigón de Cemento Portland para losas de Pavimentos Rígidos

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