Mechanical strength analysis of fly-ash based concrete in presence of red mud

Kumar, K. Rajesh; Bansal, Manjeet; Garg, Rishav; Garg, Rajni

doi:10.1016/j.matpr.2021.09.233

Cited by 8 publications

(12 citation statements)

References 23 publications

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“…The variation in density observed in this study, particularly with the addition of different levels of FA (FA %), can be explained as follows: we observe a reduction of density due to the incorporation of HVFA. It can be attributed to a higher specific gravity of FA with a higher incorporation …”

Section: Resultsmentioning

confidence: 99%

“…The best concrete performance, including strength and durability, is ensured by evaluating its reactivity. By lowering the need for energy-consuming Portland cement, adequate characterization promotes quality control and benefits the environment . The chemical composition of this material is shown in Table .…”

Section: Methodsmentioning

confidence: 99%

“…It can be attributed to a higher specific gravity of FA with a higher incorporation. 18 Specific gravity is a measure of the density of a substance relative to the density of water. Since FA particles tend to be denser than water, their inclusion in the concrete mixture contributes to a reduction in the overall density of the samples.…”

Section: Yield Stressmentioning

confidence: 99%

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Strength Characteristics and Rheological Behavior of a High Level of Fly Ash in the Production of Concrete

Boutkhil,

Fellak,

Aouan

et al. 2024

ACS Omega

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This study investigates the valorization of coal fly ash (FA-C) generated by the Jerada thermal power plant, aiming to address the pressing need for sustainable construction practices and reduced greenhouse gas emissions in the concrete industry. It is widely used as a pozzolanic material. The key objective is to harness the potential of FA-C as a supplementary material in concrete production, which not only reduces costs but also contributes to environmental sustainability. To achieve this objective, various concrete mixtures were formulated, with FA-C serving as a partial substitute for cement at percentages ranging from 15 to 50%. According to ASTM standards, compressive strength tests were conducted on standard-sized cylinders at 7 and 28 days. The results revealed that the blend containing 15% FA-C exhibited the highest compressive strength, indicating its effectiveness as a concrete additive. Furthermore, this study delves into the rheological properties of concrete mixes, an essential aspect of successful concrete processing. It was observed that a higher replacement level of FA-C significantly improved the rheology, leading to reduced water demand and a linear decrease in plastic viscosity over time. The rheological parameters stabilized after a certain period, demonstrating the controllability of concrete flow behavior with FA-C. The investigation also employed three analytical methods�Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM)�to comprehensively analyze both raw materials and processed samples. FTIR analysis highlighted the minimal impact of FA particles on hydration product formation, emphasizing the role of FA-C in enhancing the concrete's strength. XRD analysis confirmed the presence of an amorphous phase crucial for FA's reactivity. SEM observations revealed that concrete with 15% FA-C exhibited a more uniform microstructure with aluminosilicate gel, while 50% FA-C mixes showed increased porosity and nonhomogeneity due to unreacted FA particles.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Strength Characteristics and Rheological Behavior of a High Level of Fly Ash in the Production of Concrete

Boutkhil,

Fellak,

Aouan

et al. 2024

ACS Omega

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“…30 wt.% RM replacement in OPC concrete resulted in lower water absorption than conventional OPC concrete, and surface resistivity value was slightly higher in RM‐based concrete compared to conventional concrete. Kumar, et al [65f] . concluded that mechanical strengths increased with increasing RM content when compared to OPC‐based concrete, with 20 wt.% being the optimal value of RM to replace OPC.…”

Section: Rm In Construction and Building Materialsmentioning

confidence: 99%

Characterization and Applications of Red Mud, an Aluminum Industry Waste Material, in the Construction and Building Industries, as well as Catalysis

Al-Fakih

Nor

Basha

et al. 2023

The Chemical Record

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The disposal of red mud (RM), a waste material generated by the aluminum industry, remains a global environmental concern because of its high alkalinity and smaller particle size, which have the potential to pollute air, soil, and water. Recently, efforts have been made to develop a strategy for reusing industrial byproducts, such as RM, and turning waste into value‐added products. The use of RM as (i) a supplementary cementitious material for construction and building materials, such as cement, concrete, bricks, ceramics, and geopolymers, and (ii) a catalyst is discussed in this review. Furthermore, the physical, chemical, mineralogical, structural, and thermal properties of RM, as well as its environmental impact, are also discussed in this review. It is possible to conclude that using RM in catalysis, cement, and construction industries is the most efficient way to recycle this byproduct on a large scale. However, the low cementitious properties of RM can be attributed to a reduction in the fresh and mechanical properties of composites incorporating RM. On the other hand, RM can be used as an efficient active catalyst to synthesize organic molecules and reduce air pollution, which not only makes use of solid waste but also lowers the price of the catalyst. The review provides basic information on the characterization of RM and its suitability in various applications, paving the way for more advanced research on the sustainable disposal of RM waste. Future research perspectives on the utilization of RM are also addressed.

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“…With yearly output surpassing hundreds of millions of tons, the hazardous by‐products FA and RM pose a significant environmental risk. Due to the porous and fine particle structure of RM, it is possible to create a ceramic system with both FA and RM 50–52 . In a previous study, Özcan et al 21 .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic properties of ZnO nanoparticle coating on porous ceramic substrates with varying porosities produced from fly ash and red mud

Özcan,

Birol,

Dülger Kutlu

et al. 2023

Int J Applied Ceramic Tech

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In order to improve filtering efficacy, nanoparticles are often deposited as photocatalytic degrading agents onto porous ceramics. This study aimed to deposit ZnO nanoparticles on ceramic substrates produced from fly ash and red mud with adjustable porosity and investigate their photocatalytic properties. To achieve this goal, at first porous ceramics were produced and sintered at various temperature/time intervals. It was observed that sintering at 800°C for 120 min provided a proper structure and porosity. In addition, MgO replacement with MgCO3 lowered the water absorption of the samples from 25.63% to 11.45%. The samples were then coated with ZnO nanoparticles using the sol–gel method and the ZnO structures obtained were micron‐sized plates. It was observed that increasing porosity increased the ZnO amount and accordingly the photocatalytic properties of the products. During the adsorption tests conducted in the dark, the coated ceramic samples were stained with MB with a maximum MB adsorption ratio of ∼14%. On the other hand, no visible MB stain was observed on the samples that were exposed to UV irradiation, and the MB removal after the UV irradiation was 93.6%; therefore, it was concluded that the dominant MB removal mechanism was photocatalytic.

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Mechanical strength analysis of fly-ash based concrete in presence of red mud

Cited by 8 publications

References 23 publications

Strength Characteristics and Rheological Behavior of a High Level of Fly Ash in the Production of Concrete

Strength Characteristics and Rheological Behavior of a High Level of Fly Ash in the Production of Concrete

Characterization and Applications of Red Mud, an Aluminum Industry Waste Material, in the Construction and Building Industries, as well as Catalysis

Photocatalytic properties of ZnO nanoparticle coating on porous ceramic substrates with varying porosities produced from fly ash and red mud

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