Study on the effect of reinforced recycled aggregates on the performance of recycled concrete--synergistic effect of cement slurry-carbonation

Chen, Feng; Cui, Buwen; Guo, Hui; Zhang, Wenyan; Zhu, Jianping

doi:10.1016/j.jobe.2022.105700

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…It has been shown that several therapy approaches may ameliorate RA subtypes. Two examples are [1,[31][32][33][34] deadhesion and strengthening of cement mortar. To name only a few examples of treatments: carbonization [34][35][36][37][38][39][40][41][42], microwave heating [43,44], pre-soaking RA in nano silica solution [45,46], water-repellent treatment [16,47], impregnation with polyvinyl alcohol [32], HCl [48], sodium hexameter phosphates [49], and organosilicon modifiers [44,50].…”

Section: Introductionmentioning

confidence: 99%

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Abdo,

El-Zohairy,

Alashker

et al. 2024

Sustainability

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Using recycled concrete aggregates from construction and demolition wastes on structural concrete is a sustainable solution to reduce the consumption of natural resources and the detrimental effects of concrete production on the environment. This paper has collected much data from the literature to study fresh, mechanical properties and durability of concrete made of treated/untreated recycled aggregate (RA). Furthermore, the flexural and shear behavior of recycled aggregate concrete (RAC) beams was studied. This study discussed the distinctions and similarities between reinforced RAC beams and reinforced natural aggregate concrete (NAC) beams. The results of this review’s analysis clearly show that reinforced RAC beams with different RAC ratios perform structurally on par with or slightly worse than reinforced NAC beams, demonstrating the viability of RAC for structural applications. Emphasis is placed on carefully choosing and adjusting material models for recycled aggregate concrete. Ultimately, guidelines for future inquiries in this field are delineated and deliberated upon. The review will be advantageous for academics and professionals who aim to acquire a comprehensive comprehension of the behavior of RAC beams. It addresses several practical concerns connected to the numerical modeling of these components, which have not been adequately covered in existing literature.

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Section: Introductionmentioning

confidence: 99%

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Abdo,

El-Zohairy,

Alashker

et al. 2024

Sustainability

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show abstract

“…Recycled concrete aggregates are obtained through processes such as crushing, screening, and washing of waste concrete and exhibit physical and mechanical properties similar to natural aggregates [4,5,[8][9][10][11][12]. The utilization of recycled concrete aggregates not only reduces the consumption of natural resources but also lowers the processing costs associated with waste concrete, thereby contributing to the achievement of sustainability goals [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Modification of Recycled Concrete Aggregate: An Overview of Research Progress

Su,

Yao,

Wang

et al. 2023

Preprint

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The performance of recycled aggregate concrete deteriorates due to the defects of adhesive mortar, pores and cracks on the surface of recycled aggregate. It is of great engineering significance to modify the reclaimed aggregate to improve its performance and adaptability. In this paper, the physical and chemical properties of waste concrete recycled aggregate are reviewed. Then, the existing modification methods and technologies of recycled aggregate, including physical, chemical and biological methods, are reviewed. Finally, the existing problems of the current modification technology are summarized, and the future research direction is proposed. It is expected to provide a new idea and method for the modification of waste concrete recycled aggregate.

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Mechanical properties and frost resistance of recycled brick aggregate concrete modified by nano-SiO₂

Su,

Wang,

Zhang

et al. 2023

Nanotechnology Reviews

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In this work, brick aggregates were immersed in nano-SiO2 solution for 2 days, and the effects of nano-SiO2 on the brick aggregate properties, mechanical properties (compressive strength, flexural strength, and splitting tensile strength), frost resistance (apparent phenomenon, mass loss, relative dynamic modulus of elasticity, and compressive strength) of recycled brick aggregate concrete and the microstructure of recycled brick aggregate concrete were investigated. The results show that nano-SiO2 can effectively improve the performance of recycled brick aggregate and the mechanical properties of recycled brick aggregate concrete, mainly by reducing the water absorption and crushing index and improving the compressive strength, flexural strength, and splitting tensile strength. With increasing nano-SiO2 solution concentration, the compressive strength, flexural strength, and splitting tensile strength of recycled brick aggregate concrete first increase and then decrease. The frost resistance of recycled brick aggregate concrete is superior to that of ordinary aggregate concrete, while the frost resistance of nano-SiO2-modified recycled brick aggregate concrete is inferior to that of recycled brick aggregate concrete. In addition, the freeze‒thaw damage mechanism of recycled brick aggregate concrete is analyzed, and a freeze‒thaw damage life prediction model of nano-SiO2-modified recycled brick aggregate concrete based on the Weibull distribution is proposed.

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Study on the effect of reinforced recycled aggregates on the performance of recycled concrete--synergistic effect of cement slurry-carbonation

Cited by 5 publications

References 33 publications

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Modification of Recycled Concrete Aggregate: An Overview of Research Progress

Mechanical properties and frost resistance of recycled brick aggregate concrete modified by nano-SiO₂

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Study on the effect of reinforced recycled aggregates on the performance of recycled concrete--synergistic effect of cement slurry-carbonation

Cited by 5 publications

References 33 publications

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Effect of Treated/Untreated Recycled Aggregate Concrete: Structural Behavior of RC Beams

Modification of Recycled Concrete Aggregate: An Overview of Research Progress

Mechanical properties and frost resistance of recycled brick aggregate concrete modified by nano-SiO2

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Product

Resources

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Mechanical properties and frost resistance of recycled brick aggregate concrete modified by nano-SiO₂