Self-compacting concrete manufactured with recycled concrete aggregate: An overview

Revilla‐Cuesta, Víctor; Skaf, Marta; Faleschini, Flora; Manso, Juan Manuel García; Ortega-López, Vanesa

doi:10.1016/j.jclepro.2020.121362

Cited by 135 publications

(72 citation statements)

References 90 publications

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“…-The findings were encouraging since the strength drop of concrete incorporating recycled gravel only does not exceed 17% for a target characteristic strength of 70 MPa. These results confirm the trend evoked by the antecedent studies of Revilla-Cuesta et al [25], and Masood et al [26], their researches is presented into recycled concrete aggregate properties and the mix-design of the self-compacting concretes that contain them, as well as relevant results on the fresh state (workability, rheology), the hardened state (compressive strength, splitting tensile and flexural strength, modulus of elasticity, density, and porosity), durability (resistance to aggressive agents), long-term properties of concrete (shrinkage, creep), and structural elements manufactured with self--Mesh construction.…”

Section: Discussion and Interpretationsupporting

confidence: 92%

Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Nehar

Benamara

2021

Frattura Ed Integrità Strutturale

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Concrete, a material of prime importance, is widely used in various works. Among the raw materials composing concrete, aggregates come first. It is widely acknowledged that the consumption of natural aggregates increases with the growth in the amount of concrete needed. It has recently emerged that concrete waste can be recycled and reused in civil engineering works after a series of treatments. Moreover, in order to protect the environment and based on the principles of sustainable development, it was considered urgent to produce a High Strength Concrete incorporating recycled materials in addition to silica fume and a high-efficiency superplasticizer. This would certainly help to establish a harmonious sustainable development that guaranties the ecological balance and environmental protection, and prevents the depletion of natural resources. This study is part of a larger research program that that seeks to recover, recycle and valorize construction and demolition wastes. The main objective sought in this article is firstly to use aggregates from demolition concrete in the manufacture of a new concrete with high mechanical and rheological performance, and secondly, to model the behavior of this type of concrete using the Finite Element Method. This modeling aims to evaluate the maximum compressive strengths and compare them with those obtained experimentally.

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Section: Discussion and Interpretationsupporting

confidence: 92%

Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Nehar

Benamara

2021

Frattura Ed Integrità Strutturale

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“…FA is an important admixture to improve the workability and reduce the demand of cement or fine fillers in Steel Fiber Reinforced SCC (SFR-SCC). It has a great role in creating a sufficient amount of cement paste in SFR-SCC and improves the mechanical properties by filling the micro-pores in it [43]. Silica fume consists of small-sized particles approximately 100 to 150 times smaller than Portland cement particles, and has a high surface area and high amount of silicon dioxide.…”

Section: Experimental Procedures and Materialsmentioning

confidence: 99%

Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete

Gebretsadik

Jadidi

Farhangi

et al. 2021

Eng. Technol. Appl. Sci. Res.

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This study investigates the feasibility of the application of ultrasonic measurement to characterize Steel-Fiber-Reinforced Concrete (SFRC). Specifically, the effects of steel fiber content, age, moisture content, and fiber orientation on Ultrasonic-Pulse-Velocity (UPV) were investigated. In this regard, beam and cylindrical samples were fabricated with different steel fiber contents. The result indicated that for beam specimens the UPV increases with the addition of fiber up to 2% and decreases for higher fiber percentages. Additionally, the fiber orientation within the beam specimens influences the UPV measurements. For cylindrical samples, the rate of UPV decreased with the addition of steel fiber reinforcement. In addition, it was discovered that the curing period affects the magnitude of UPV.

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“…Esto da lugar a un hormigón más sustentable con un residuo de bajo costo (Dobiszewska M. (2017)). Algo similar a lo que ocurre con la posibilidad de incorporación de agregados reciclados en HAC (Revilla-Cuesta V. et al (2020)).…”

Section: Flowability Of Self-compacting Pastes With Basalt Powderunclassified

Fluidez de pastas autocompactantes con polvo de basalto

Pizzutti¹,

Barros‐Velázquez²,

Flores³

2021

Congresso Internacional Sobre Patologia E Reabilitação Das Construções

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Un hormigón autocompactante requiere elevados contenidos de material fino para mantener la estabilidad de la mezcla, garantizando una elevada fluidez y una moderada viscosidad. El objetivo del trabajo es analizar la viabilidad de utilización del polvo de basalto (PB) como material suplementario al cemento Portland para proveer la cantidad adecuada de partículas finas en pastas autocompactantes como la primera fase del diseño de morteros y hormigones. Se caracterizaron muestras de PB provenientes de cuatro canteras de la Provincia de Misiones con el fin de utilizarlas en la elaboración de pastas con un cemento Portland compuesto. El estudio de las pastas abarcó la determinación del escurrimiento con cono de Kantro y la velocidad de flujo en cono de Marsh. Los resultados indican que es viable la utilización del PB desde el enfoque de autocompactabilidad, teniendo en cuenta que la relación entre agua y material fino es determinante en el diseño de la mezcla, afectando principalmente la demanda y el punto de saturación del aditivo y la fluidez y viscosidad de las pastas autocompactantes con diferentes porcentajes de reemplazo con PB. La resistencia a compresión de las pastas evaluada a 28 días varió entre 55 y 25 MPa para reemplazos crecientes de PB de 20 a 50%, respectivamente.Palabras claves: fluidez, pasta autocompactante, polvo de basalto, viscosidad.

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Self-compacting concrete manufactured with recycled concrete aggregate: An overview

Cited by 135 publications

References 90 publications

Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete

Fluidez de pastas autocompactantes con polvo de basalto

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