Mechanical and environmental performance of polymer stabilized iron ore tailings

Carneiro, Andressa de Araujo; Casagrande, MichÃ©le Dal ToÃ©

doi:10.28927/sr.434679

Cited by 3 publications

(7 citation statements)

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“…CHN Elemental Analysis showed that the polymer comprises 69.03% carbon, 7.01% hydrogen, and 0.52% nitrogen. The product is frequently used for pavement sealing and as a soil stabilizer [ 2 , 3 , 6 ].…”

Section: Methodsmentioning

confidence: 99%

“…It consists of an organic acrylic-styrene copolymer obtained randomly and presented as an aqueous emulsion of anionic character. The polymer has a pH of 8.0-9.0, a density of 0.98-1.04 g/cm 3 , a viscosity of 3000-10,000 centipoise (cP), and is completely soluble in water. CHN Elemental Analysis showed that the polymer comprises 69.03% carbon, 7.01% hydrogen, and 0.52% nitrogen.…”

Section: Soil and Composites 25% And 5%mentioning

confidence: 99%

“…The soil has a specific gravity of 2.7 g/cm 3 and is classified as a non-plastic soil (NP). The soil's grain size distribution curve (Figure 3) following the HRB classification adopted by AASHTO corresponds to soil type A-3.…”

Section: Soilmentioning

confidence: 99%

“…Many geotechnical projects aim at soil stabilization, wherein the success of soil enhancement procedures is evaluated, striving to promote soil stability, strength, resistance to erosion, and economic viability. This holds for stabilization, improvement, or reinforcement of diverse geotechnical structures [ 1 , 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

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The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

Boaventura,

Sousa,

Casagrande

2023

Polymers

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The conducted investigation encompassed the comprehensive integration of mechanical, environmental, chemical, and microstructural evaluations of a composite amalgamating sandy soil and a synthetic polymer at two distinct concentrations (2.5% and 5%) across multiple curing intervals (0, 1, 2, 4, 7, 15, 30, and 45 days). The studied soil originates from an environmentally significant protected area in Brazil. The implementation of mechanisms for soil improvement in the region must adhere to technical criteria without causing environmental harm. Direct shear testing was conducted, permeability was assessed, and microstructure analysis and XRD and XRF/EDX studies of both the soil and composites were conducted. It was observed that longer curing times yielded improved results in shear stress, friction angle, and cohesive intercept, with SP_5% exhibiting the highest values compared with the soil and SP_2.5%. Adding the polymeric solution to the soil contributed to cementation and cohesion gains in the substrate. Through microstructural characterization, the polymer’s role as a cementing agent for the grains is evident, forming a film on the grains and binding them together. Based on the analyses and studies conducted in the research, it can be concluded that there is technical feasibility for applying the polymeric solution at both dosages in geotechnical projects.

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Section: Methodsmentioning

confidence: 99%

Section: Soil and Composites 25% And 5%mentioning

confidence: 99%

Section: Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

Boaventura,

Sousa,

Casagrande

2023

Polymers

View full text Add to dashboard Cite

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“…The fundamental improvement technique is compaction, which allows an increase in resistance by generating a more stable structure. This may not be sufficient, and additional processes such as stabilization and reinforcement may be required [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Proposal of New Construction Material: Polymer-Stabilized Gold Ore Tailings Composite

et al. 2022

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Recent events involving the rupture of tailings dams in Brazil have motivated the search for alternatives to incorporate the material into the production chain. At the same time, the consumption of raw materials by the civil construction sector is high, requiring the incorporation of alternative materials to achieve sustainable development. Thus, this paper proposes a new construction material based on the mechanical and microstructural behavior of polymer-stabilized and fiber-reinforced gold ore tailings composites. Unconfined Compressive Strength tests were performed on different polymer contents (6% and 9%), dry unit weights (1.7 g/cm³ and 1.8 g/cm³), and curing periods (7 and 28 days), according to 2K Experimental Design. Microstructural tests were performed using X-ray Diffraction, X-ray Fluorescence Spectrometry, Optical Microscopy, Scanning Electron Microscopy, and X-ray Micro-Computed Tomography. The results demonstrate that adding polymer increased tailings’ mechanical behaviors by forming packages with the lamellar particle, which was observed in microstructural tests. The polymeric composites’ brittle behavior was improved using fiber insertion, leading to an increase of the strain energy absorption capacity. The polymer-stabilized and fiber-reinforced gold ore tailings composites demonstrated its potential as a construction material, especially in landfill structures, tailings stockpiles, and paving base layers. The association of mechanical and microstructural analysis established a new understanding of the effect of the stabilizer and the reinforcement.

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Key Success Factors for the Practical Application of New Geomaterials

Alelvan,

Santos,

Pierozan

et al. 2023

Sustainability

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Geomaterials comprise naturally formed materials through geological processes, such as soils and rocks, or artificially processed materials, including mineral waste and geosynthetics. These materials find extensive use in geotechnical structures, such as slopes, dams, and pavements, among others. However, two issues commonly arise in earthworks: the materials available in the region do not meet the minimum engineering requirements, resulting in high transportation costs, and the exploitation of new deposits increases environmental impacts. Consequently, there is a need to develop stabilization and reinforcement techniques aimed at creating new geomaterials (NGs) to expand the range of local material applications. In this context, the present study evaluates the key success factors (KSFs) related to the application of NGs in geotechnical structures. The Delphi method was employed through a structured questionnaire developed after an extensive literature review. Brazilian experts from the public, private, and academic sectors were selected to identify the obstacles and potential pathways for the practical application of NGs. The outcomes of the study indicated that the lack of standardization, the complex behavior of geomaterials under varying conditions, as well as technical and economic limitations serve as barriers impeding the widespread adoption of NGs. Finally, a roadmap proposal was devised, encompassing a series of actions intended to facilitate the broader utilization of NGs.

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Mechanical and environmental performance of polymer stabilized iron ore tailings

Cited by 3 publications

References 0 publications

The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

Proposal of New Construction Material: Polymer-Stabilized Gold Ore Tailings Composite

Key Success Factors for the Practical Application of New Geomaterials

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