Yazar "Jamalimoghadam, Mohammad" seçeneğine göre listele

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    Municipal Waste Incineration Fly Ash Engineering Applications with a View to Reducing Leaching of Heavy Metal Pollution
    (Mehmet Sinan Bilgili, 2022) Jamalimoghadam, Mohammad; Vakili, Amir Hossein; Saffarzadeh, Amirhomayoun; Ulutas, Kadir
    Municipal waste incineration fly ash (MSWIFA) is categorized as hazardous waste because of its high content of potentially toxic elements and other pollutants (e.g., heavy metal species and heavy metals leaching). Stabilizing and immobilizing heavy metals in fly ash or removing dioxins are two significant issues that must be overcome in treating and disposing of MSWIFA. This paper emphasizes state-of-art findings from literatures on the challenges of using ashes from the combustion of municipal solid waste (MSW). The reviewed articles suggested that the MSW ash can be safely used in various fields of engineering. However, the risk of using these substances in terms of environmental and human health conditions should be carefully considered.
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    Solidification and utilization of municipal solid waste incineration ashes: Advancements in alkali-activated materials and stabilization techniques, a review
    (Academic Press Ltd- Elsevier Science Ltd, 2024) Jamalimoghadam, Mohammad; Vakili, Amir Hossein; Keskin, Inan; Totonchi, Arash; Bahmyari, Hossein
    Researchers are actively investigating methodologies for the detoxification and utilization of Municipal Solid Waste Incineration Bottom Ash (MSWIBA) and Fly Ash (MSWIFA), given their potential as alkali-activated materials (AAMs) with low energy consumption. Recent studies highlight that AAMs from MSWIFA and MSWIBA demonstrate significant durability in both acidic and alkaline environments. This article provides a comprehensive overview of the processes for producing MSWIFA and MSWIBA, evaluating innovative engineering stabilization techniques such as graphene nano-platelets and lightweight artificial cold-bonded aggregates, along with their respective advantages and limitations. Additionally, this review meticulously incorporates relevant reactions. Recommendations are also presented to guide future research endeavors aimed at refining these methodologies.
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    A systematic review of strategies for identifying and stabilizing dispersive clay soils for sustainable infrastructure
    (Elsevier, 2024) Vakili, Amir Hossein; Salimi, Mahdi; Keskin, Inan; Jamalimoghadam, Mohammad
    Dispersivity has long been a major concern in civil and geo-environmental engineering, as well as in agricultural engineering and soil sciences. Dispersive clay soils are common, but their prevalence and characteristics vary greatly across different regions of the world, especially in arid and semi-arid areas. These soils are highly unstable and prone to erosion when exposed to water, due to their high concentration of exchangeable sodium ions and large specific surfaces. This can cause serious damage to hydraulic infrastructure. However, identifying and stabilizing dispersive clay soils is crucial for infrastructure projects, as the use of untreated soils can result in irreversible and catastrophic failures due to internal erosion and piping. The systematic management of dispersive clays is crucial to prevent the wastage of fertile agricultural land and land designated for engineering construction. Although industrialization has numerous benefits, it often results in large quantities of waste byproducts that must be managed appropriately to reduce their environmental impact. The reuse of these wastes in soil improvement has become an increasingly popular approach to address both environmental pollution and cost-effectiveness concerns. Despite the growing interest in using waste by-products for soil stabilization, there is a lack of a systematic and comprehensive review of the management, mechanisms, identification systems, and improvement strategies for both traditional and non-traditional stabilizers. Therefore, there is an urgent need to review the available literature to provide a comprehensive understanding of the use of waste by-products for soil stabilization. Such a review could aid in the creation of soil stabilization methods that are both efficient and enduring while minimizing the environmental impact of waste by-products.
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    Wetting-drying impact on geotechnical behavior of alkali-stabilized marl clay with glass powder
    (Springer Int Publ Ag, 2024) Jamalimoghadam, Mohammad; Vakili, Amir Hossein; Ajalloeian, Rassoul
    This paper comprehensively focuses on the wetting-drying (W-D) behavior of carbonated marl soil, treated by a geopolymer utilizing alkali-activated milled recycled glass (MRG) and ordinary Portland cement. The effect of the stabilizer ratio (5%, 10%, 15%), curing times and temperature (24 h under 25 degrees C and 50 degrees C), sample preparation procedure (curing under a pressure of 200 kPa and in an oven), alkaline concentration (2, 4, 6 mol/L), pH, and different W-D cycles (1, 3, and 12 cycles) were assessed. Furthermore, this article explores the failure behavior of samples, a fact that has received limited attention in previous studies. Binding phases were examined using XRD, FTIR, and SEM-EDS techniques to analyze crystallinity and functional groups in stabilized specimens. The findings indicated greater efficiency in stabilization with lower alkaline activator concentration (2 mol/L), higher glass powder content (15%), and longer curing (90 days), which is abbreviated as 15S2M. Nonetheless, an excessive alkali content of 6 mol/L had adverse effects, leading to a decrease in the strength of the final product and a change in the failure pattern. Visual observations post UCS testing revealed four distinct failure modes, varying based on specific mixtures and curing times. In natural marl samples, irrespective of curing time, the failure surface and deformed shape exhibited a variation in cross-sectional area, with unclear failure planes resulting in a bulging or buckling failure mechanism. Notably, in low alkaline concentration scenarios and high MRG content, as well as in cement-stabilized samples, identifiable failure planes were observed, indicating shearing along a single plane or a sliding mode. The results also demonstrate the superior durability of cement-based samples during W-D cycles.