Durability assessment of recycled aggregate in concrete production

Bamigboye, Gideon; Ademola, D.; Kareem, M.A.; Orogbade, Blessing O.; Odetoyan, Abimbola; Adeniyi, Adedayo

doi:10.1016/b978-0-12-824105-9.00010-x

Cited by 4 publications

(5 citation statements)

References 61 publications

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“…Existing studies on recycled fine aggregate concrete have mainly focused on aspects such as its durability. For instance, Xiao et al [ 18 ] and Bamigboye et al [ 19 ] investigated the durability of recycled fine aggregate concrete, and the results showed that although the durability of recycled fine aggregate is slightly lower than that of ordinary concrete, it can still be used in concrete construction, making it practicable for engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Mechanical Properties and Theoretical Models for Recycled Fine and Coarse Aggregate Concrete with Steel Fibers

Wu,

Shi,

et al. 2024

Materials

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With diminishing natural aggregate resources and increasing environmental protection efforts, the use of recycled fine aggregate is a more sustainable approach, although challenges persist in achieving comparable mechanical properties. Exploration into the incorporation of steel fibers with recycled aggregate has led to the development of steel-fiber-reinforced recycled aggregate concrete. This study investigates the shrinkage performance and compressive constitutive relationship of steel fiber recycled concrete with different steel fibers and recycled aggregate dosages. Initially, based on different replacement rates of recycled coarse aggregate and different volume contents of steel fiber, experimental results demonstrate that as the replacement rate of recycled coarse aggregate increases, shrinkage also increases, while the addition of steel fiber can mitigate this effect. An empirical shrinkage model for steel fiber recycled concrete under natural curing conditions is also proposed. Subsequently, based on the uniaxial compression test, findings indicate that with an increasing replacement rate of recycled fine aggregate, the peak stress and elastic modulus of concrete decrease, accompanied by an increase in peak strain, and the addition of steel fiber limits concrete crack development and enhances its brittleness while the peak stress and strain of recycled fine aggregate concrete are enhanced. However, the steel fiber volume percentage has a negligible effect on the elastic modulus. A constitutive relationship for concrete considering the effects of recycled fine aggregate and steel fiber is also proposed. This finding provides foundational support for the influence patterns of steel fiber dosage and recycled aggregate ratio on the mechanical properties of steel fiber recycled concrete.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Mechanical Properties and Theoretical Models for Recycled Fine and Coarse Aggregate Concrete with Steel Fibers

Wu,

Shi,

et al. 2024

Materials

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“…This material is created when asphalt pavements are removed for various activities, including reconstruction, resurfacing and gaining access to buried utilities (Chesner et al, 2002). Recycled concrete aggregate is defined as aggregate produced from concrete construction and demolition waste, which either partially or completely replaces conventional natural aggregates (NAs) (Bamigboye et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Intermediate Temperature Fracture Resistance of Stone Matrix Asphalt Containing Untreated Recycled Concrete Aggregate

Leon

Smith

Frank³

2023

BJRBE

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The sustainable alternative of blending natural limestone aggregates (NAs) with recycled concrete aggregate (RCA) was investigated in this research in order to encourage the utilization of recycled concrete in heavy traffic paving applications. The Marshall Mix design method was used to optimize mix designs containing 0%, 10%, 35% and 50% RCA. Single-edge notched beam (SENB) and semi-circular bending (SCB) tests were then applied and the fracture energy and fracture toughness determined. The tests were conducted at intermediate temperatures (5 °C, 15 °C, 25 °C) and varying notch depths (0.2H, 0.3H and 0.4H). Fracture energy and toughness did not consistently follow the behaviour of mixes with only NA; however, it was determined in this study that a RCA content between 10% and 35% would achieve peak loads, fracture energies and fracture toughness values comparative to a virgin mix.

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“…In the meantime, utilizing RA reduces waste, leading to more protection of the environment and more sustainable practices in the field of building construction. Not only can this eliminate billions of tons of construction and demolition wastes produced globally 2 , but also CO 2 emission and limestone consumption can be reduced by up to 20% and 60%, respectively 7,8 .The properties of RA are different from those of virgin aggregates, mainly because of the existing old mortar 9 . In general, concrete specifications depend on the properties of aggregates used in the mix design 3 .…”

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confidence: 99%

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confidence: 99%

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A comprehensive quantitative bottom-up analysis of fiber-reinforced recycled-aggregate concrete behavior

Hosseinzadeh

Dehestani

Samadvand³

2023

Sci Rep

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This study provides a more profound understanding of the influence of the phases of fiber-reinforced recycled-aggregate concrete (FRRAC), on its elastic properties, in particular Young’s modulus and Poisson’s ratio. Multi-scale modeling analyses of mortar and FRRAC were conducted to assess the effect of variations in the fiber content, fiber elastic modulus, RA content, and water-to-cement ratio (w/c) on the elastic properties at each scale. Thus, the analytic Mori–Tanaka (MT) homogenization algorithm developed in Python programming language and the three-dimensional finite element (FE) homogenization scheme were applied to evaluate the elastic properties of FRRAC. As such, different fiber types including steel, basalt, glass, and propylene, at a volume fraction range of 0–2%, along with the variations in fiber elastic modulus, and different RA replacement levels ranging from 0 to 100% were incorporated in the modeling process at different w/c ratio. Based on the results, the Poisson’s ratio of steel FRRAC in the MT approach surges with increasing fiber content. Furthermore, the elastic modulus of FRRAC is highly susceptible to an increase in Young’s modulus of polypropylene fiber, among other fiber types. The elastic modulus of concrete experiences a sharp decrease with increasing w/c for all fiber types in both FE and MT approaches.

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Durability assessment of recycled aggregate in concrete production

Cited by 4 publications

References 61 publications

Experimental Study of Mechanical Properties and Theoretical Models for Recycled Fine and Coarse Aggregate Concrete with Steel Fibers

Experimental Study of Mechanical Properties and Theoretical Models for Recycled Fine and Coarse Aggregate Concrete with Steel Fibers

Intermediate Temperature Fracture Resistance of Stone Matrix Asphalt Containing Untreated Recycled Concrete Aggregate

A comprehensive quantitative bottom-up analysis of fiber-reinforced recycled-aggregate concrete behavior

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