Pre‐treatment of Waste Foundry Sand Via Solidification/Stabilization

Başar, Hatice Merve; Aksoy, Nuran Deveci

doi:10.1002/clen.201200043

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Waste foundry sand (WFS) is a waste of foundry industries, which finds no use elsewhere. After casting is over, the sand is discarded and is not recommended for reuse (Basar and Aksoy, 2013). This is a classified Resource Conservation and Recovery Act hazardous waste and currently dumped in open because of ineffective regulations in India.…”

Section: Effect Of Industrial Wastes 1749mentioning

confidence: 99%

Effect of industrial wastes and lime on strength characteristics of clayey soil

Bhardwaj

Sharma

2020

JEDT

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Purpose The purpose of this paper is to attempt to use two industrial wastes; waste foundry sands (WFS) and molasses (M) along with lime (L) to improve the strength characteristics of clayey soil. Design/methodology/approach In the first part of the study, the optimum percentages of materials (WFS, molasses, lime) have been found out by conducting differential free swell (DFS) and consistency limit tests on clayey soil by adding various admixtures. The second and third part of the study investigates the compaction behaviour and unconfined compressive strength (UCS) of clayey soil on addition of optimum amount of various materials alone and in combination with each other. Finally, the micro-structural behaviour of addition of optimum percentages of lime, WFS and molasses using Scanning electron microscopic technique has been discussed. Findings The laboratory results revealed that the addition of optimum content of lime along with WFS and molasses reduced DFS and plasticity index and increased maximum dry density and UCS values. The microstructural behaviour showed that the presence of lime and molasses filled the voids present in the soil and the addition of WFS helped in providing compact structure, thus improving the strength characteristics. Practical implications The study will be helpful in designing low-cost pavement designs for rural roads. Social implications The adverse effect of waste materials on environment may be solved by using them in improving the strength characteristics of clayey soils, thereby providing healthy environment to living beings. Originality/value The study will help to provide low-cost methods to improve strength characteristics of clayey soil along with the use of waste materials; the disposal of whose is a challenging task.

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Section: Effect Of Industrial Wastes 1749mentioning

confidence: 99%

Effect of industrial wastes and lime on strength characteristics of clayey soil

Bhardwaj

Sharma

2020

JEDT

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“…PBW) is through solidification/stabilization. These processes are carried out with the use of cementing agents, such as Portland cement and cement with the addition of pozzolanic material, making it possible to encapsulate the contaminants and reduce the leaching of heavy metals and organic pollutants 8 , 9 . In this context, PBW (in the form of sludge) has been studied as a partial replacement of lime and sand in mortar mixtures 5 , in the incorporation of red ceramic 10 and in bituminous mixtures 11 and also as a polymeric additive in concrete mixtures 12 .…”

Section: Introductionmentioning

confidence: 99%

Paint booth waste as an alternative aggregate for the production of interlocking concrete blocks

Câmara,

Ferrazzo,

Levandoski

et al. 2024

Sci Rep

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Inadequate disposal of hazardous waste results risks to the environment and human health. Although the use of hazardous waste in new processes and/or products has received limited attention in the literature, there is still significant potential to be investigated. Reducing the usage of natural resources and waste management are important for sustainable practices during concrete production. This study investigated the mechanical and leaching behavior of paint booth waste (PBW) as a partial substitute (10, 20, 30 and 40%) of coarse aggregate in concrete mixtures for the manufacture of interlocking blocks. A sample of PBW used in this research differs from those in the literature due to its granulometry characterized by aggregates of different sizes. Concrete consistency, compressive strength, water absorption, X-ray diffraction, scanning electron microscopy, and leaching tests were carried out. The PBW did not influence the consistency in the fresh state of the concrete. The blocks with smaller substitutions (10 and 20%) presented denser structures and with greater strengths, surpassing 35 MPa after 28 days. Higher levels of PBW resulted in more porous concrete blocks with greater water absorption. The concrete-PBW mixtures showed no metal toxicity, i.e., the incorporation of this waste in the construction material avoided metal leaching. Concrete blocks with up to 20% PBW demonstrated satisfactory mechanical and environmental performance.

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“…Natural sand is mainly used for making molds in sand casting, and waste foundry sand (WFS) from the casting process is discarded on landfills [1,2] or reused as concrete and ceramic materials [3][4][5][6][7]. WFS disposal on landfills may cause not only an increase in operational costs but also environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Wet regeneration of waste artificial sand used in sand casting using chemical solutions

Kim

Baek

et al. 2020

Environmental Engineering Research

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Natural sand and organic binders have been the main materials used in sand casting. However, inorganic binders are used in novel casting technologies, and research on artificial sand as a substitute of natural sand has been conducted. Herein, the wet regeneration of waste artificial sand was performed using a sodium silicate binder. Acidic, neutral, and basic solutions were used for wet regeneration. The effects of binder removal and reusability of the regenerated sand were investigated by comparing the characteristics and strengths of the artificial and regenerated sand. It was demonstrated that the basic solution effectively removed the binder from the surface of the waste artificial sand. The Si-O-Si bond cleavage in the binder occurred due to the high concentration of hydroxide ions in the basic solution. The strength of the regenerated sand treated with the basic solution and that of the artificial sand were similar. Moreover, the strengths of regenerated sands treated with the acidic or neutral solutions were lower than that of artificial sand due to the presence of residual binder. These results indicated that the basic solution was suitable for removing the sodium silicate binder. The quality of the regenerated sand was similar to that of artificial sand.

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Pre‐treatment of Waste Foundry Sand Via Solidification/Stabilization

Cited by 5 publications

References 22 publications

Effect of industrial wastes and lime on strength characteristics of clayey soil

Effect of industrial wastes and lime on strength characteristics of clayey soil

Paint booth waste as an alternative aggregate for the production of interlocking concrete blocks

Wet regeneration of waste artificial sand used in sand casting using chemical solutions

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