Recycling solid waste to produce eco-friendly ultra-high performance concrete: A review of durability, microstructure and environment characteristics

Hamada, Hussein M.; Shi, Jinyan; Abed, Farid; Jawahery, Mohammed S. Al; Majdi, Ali; Yousif, Salim T.

doi:10.1016/j.scitotenv.2023.162804

Cited by 33 publications

(6 citation statements)

References 90 publications

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“…The unit cubic cement consumption of UHPC is four times higher than that of ordinary concrete, reaching 800~1000 kg/m 3 [ 3 ], while each 1 t of ordinary Portland cement (OPC) produced emits 0.82 t of CO 2 into the atmosphere [ 4 ]. The high cement consumption makes UHPC costly and also has a negative impact on the environment and the heat of hydration [ 5 , 6 , 7 ], so with the arrival of the carbon peak in the construction industry, more and more researchers are focusing on using new materials and technologies to reduce the cement consumption, carbon emission, and energy consumption of UHPC while ensuring its excellent performance [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Steel Slag Powder Content and Curing Condition on the Performance of Alkali-Activated Materials Based UHPC Matrix

Shi

Deng

et al. 2023

Materials

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The accumulation of steel slag and other industrial solid wastes has caused serious environmental pollution and resource waste, and the resource utilization of steel slag is imminent. In this paper, alkali-activated ultra-high-performance concrete (AAM-UHPC) was prepared by replacing ground granulated blast furnace slag (GGBFS) powder with different proportions of steel slag powder, and its workability, mechanical properties, curing condition, microstructure, and pore structure were investigated. The results illustrate that the incorporation of steel slag powder can significantly delay the setting time and improve the flowability of AAM-UHPC, making it possible for engineering applications. The mechanical properties of AAM-UHPC showed a tendency to increase and then decrease with the increase in steel slag dosing and reached their best performance at a 30% dosage of steel slag. The maximum compressive strength and flexural strength are 157.1 MPa and 16.32 Mpa, respectively. High-temperature steam or hot water curing at an early age was beneficial to the strength development of AAM-UHPC, but continuous high-temperature, hot, and humid curing would lead to strength inversion. When the dosage of steel slag is 30%, the average pore diameter of the matrix is only 8.43 nm, and the appropriate steel slag dosage can reduce the heat of hydration and refine the pore size distribution, making the matrix denser.

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Section: Introductionmentioning

confidence: 99%

Effects of Steel Slag Powder Content and Curing Condition on the Performance of Alkali-Activated Materials Based UHPC Matrix

Shi

Deng

et al. 2023

Materials

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“…Common test methods such as scanning electron microscopy, nitrogen adsorption, and nuclear magnetic resonance testing are gradually being used to analyze the micro-characteristics of concrete materials and structures [ 20 , 21 ]. At the same time, more and more solid wastes and new materials are also being used in concrete materials and structures [ 22 ]. The relevant research aims to improve our understanding of the performance and environmental impact of concrete materials and structures in a freeze–thaw environment, which is very important for sustainable building practices.…”

Section: Introductionmentioning

confidence: 99%

Freeze–Thaw Damage Characteristics of Concrete Based on Compressive Mechanical Properties and Acoustic Parameters

Lv,

Liu,

et al. 2024

Materials

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Concrete is a versatile material widely used in modern construction. However, concrete is also subject to freeze–thaw damage, which can significantly reduce its mechanical properties and lead to premature failure. Therefore, the objective of this study was to assess the laboratory performance and freeze–thaw damage characteristics of a common mix proportion of concrete based on compressive mechanical tests and acoustic technologies. Freeze–thaw damage characteristics of the concrete were evaluated via compressive mechanical testing, mass loss analysis, and ultrasonic pulse velocity testing. Acoustic emission (AE) technology was utilized to assess the damage development status of the concrete. The outcomes indicated that the relationships between cumulative mass loss, compressive strength, and ultrasonic wave velocity and freeze–thaw cycles during the freezing–thawing process follow a parabola fitting pattern. As the freeze–thaw damage degree increased, the surface presented a trend of “smooth intact surface” to “surface with dense pores” to “cement mortar peeling” to “coarse aggregates exposed on a large area”. Therefore, there was a rapid decrease in the mass loss after a certain number of freeze–thaw cycles. According to the three stages divided by the stress–AE parameter curve, the linear growth stage shortens, the damage accumulation stage increases, and the failure stage appears earlier with the increase in freeze–thaw cycles. In conclusion, the application of a comprehensive understanding of freeze–thaw damage characteristics of concrete based on compressive properties and acoustic parameters would enhance the evaluation of the performance degradation and damage status for concrete structures.

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“…(Liu et al 2021) discussed the outlooks on utilizing CO2 seizure technologies and observed that early carbonation refines the microstructure in enhancing the mechanical and durability properties and the rate of carbonation was determined through CO2 diffusion. (Hamada et al 2023) suggested that solid wastes are suitable alternative for binder/aggregates in ultra-high-performance concrete, however improvement techniques should be proposed with suitable design and testing methods. Few studies were proposed with the use of fibres and eco-friendly materials in the development of composites to investigate the mechanical properties (Karthik et al 2022, Fayaz et al 2022, Murali et al 2023, Ramesh et al 2023a, Ramesh et al 2023b, Ahmed et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Approach of Utilization of Limestone and Treated Construction Wastes as Aggregates in the Production of High Temperature Resistant Green Concrete

2024

Global NEST: The International Journal

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<p>Natural gravel used as aggregates in the construction had a severe impact on the environment leading to scarcity in recent times. Furthermore, the resistance of such natural aggregates to crack at higher temperature zones was less. This paper investigates the above concerns on scarcity and meagre high-temperature resistance with the use of sustainable waste materials such as recycled aggregates and limestone as aggregates in the concrete. The natural aggregates were replaced with different proportions of limestone aggregates (LA), recycled aggregates (RA) and carbonation-treated recycled aggregates (CRA) to investigate their hardened properties and thermal properties at 200, 400, and 800 oC. The strength of recycled aggregate concrete (RAC) and carbonated RAC (CRAC)was reduced by 16.67% and 1.32%, while the strength of limestone aggregate concrete (LAC) was enhanced by only 2.3%. The RAC and LAC show better resistance to elevated temperature compared to control concrete and the residual temperature was observed between 200 to 400 oC.</p>

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Recycling solid waste to produce eco-friendly ultra-high performance concrete: A review of durability, microstructure and environment characteristics

Cited by 33 publications

References 90 publications

Effects of Steel Slag Powder Content and Curing Condition on the Performance of Alkali-Activated Materials Based UHPC Matrix

Effects of Steel Slag Powder Content and Curing Condition on the Performance of Alkali-Activated Materials Based UHPC Matrix

Freeze–Thaw Damage Characteristics of Concrete Based on Compressive Mechanical Properties and Acoustic Parameters

Sustainable Approach of Utilization of Limestone and Treated Construction Wastes as Aggregates in the Production of High Temperature Resistant Green Concrete

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