Study of mechanical, durability and microstructural properties of cementitious composite with addition of different iron ore tailings from Brazil

Almada, Bruna Silva; Melo, Henrique da Silva Silveira; Duarte, Marlo Souza; Aguilar, Maria Teresa Paulino; Garcia, Dayana Cristina Silva; Silva, Guilherme Jorge Brigolini; Santos, White José dos

doi:10.1016/j.jmrt.2022.03.070

Cited by 18 publications

(2 citation statements)

References 34 publications

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“…This results in a reduction in the firing temperature of clinker minerals, which in turn leads to an improvement in the firing quality and hydration performance of clinker. Almada et al [13,14] point out that can iron tailings optimize the pore structure of mortar, leading to improving the compactness of cement mortar, thus improving the corresponding mechanical strengths and durability. Pu [15] has prepared the iron tailings with a pozzolanic effect, and the iron tailings can promote the secondary hydration of aluminates in cement and significantly improve the gelling activity.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand

Wang

et al. 2023

Coatings

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Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this study, the influence of ITP on the flowability, compressive strength, chloride ion permeability and the attenuation of the performance of cement concrete during freeze–thaw cycle (F-T) damage are investigated. An X-ray diffraction, an analysis of the pores and a scanning electron microscope (SEM) are obtained to analyze the mechanism of cement concrete’s performance. The results show that the addition of ITP can decrease the flowability of fresh cement concrete. Cement concrete with a 7% ITP to mass ratio of the total aggregate shows the highest compressive strength and the minimum chloride ion permeability. The relative dynamic modulus of the elasticity of the specimens with 7% ITP during the F-T is the highest. The corresponding mass loss rate is the lowest. The mercury intrusion analysis results show that the pore volume of the specimens with 7% ITP is the lowest. The SEM results confirm that the specimens with 7% ITP show the densest microstructures.

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Section: Introductionmentioning

confidence: 99%

The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand

Wang

et al. 2023

Coatings

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“…Brazil is the world’s second-largest iron ore producer and has one of the largest mineral assets ( 30 ). Iron mining represents the most important mineral activity in the country owing to its multiplier effect and the number of financial resources involved, from mineral prospecting to defining mineral deposits to the commercialization of products.…”

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confidence: 99%

Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

de Moraes,

Neto,

Lucena

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Dark colors aggravate the absorption and accumulation of heat in urban centers in the layers of asphalt coating. These problems can be minimized by incorporating materials that increase the albedo on these pavements. The use of waste in the industry has been encouraged, and an alternative is iron ore tailing (IoT), whose material comes from processing iron ore. The circular economy encourages a change in waste disposal after project decommissioning, encouraging the transformation, reuse, and recycling of waste. Therefore, this research investigated the influence of percentages of IoT in the contents (7.5%, 10.0%, and 12.5%) as a substitute for fine natural aggregate on hot asphalt mixtures’ mechanical and thermal performance. The statistical variance test (ANOVA) was used to validate the obtained data. An economic analysis concerning the costs of production and recovery of asphalt mixtures was carried out using the Present Net Value. Asphalt mixtures with IoT were evaluated with regard to the environmental aspect using the circularity index. Among the asphalt mixtures analyzed, the one produced with 12.5% was the most viable. The results showed a gain in mechanical performance concerning tensile strength, resilient modulus, fatigue, and permanent deformation of this mixture, as well as a reduction in production costs per kilometer of highway. The use of 12.5% provided a greater circularity and a reduction of the surface temperature of the pavement by 2.9°C. IoT is viable in constructing highways close to places that produce iron ore.

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Effect of a novel spherical tailings aggregate on the macro- and mesoscopic properties of pervious concrete

Li,

Sheng,

et al. 2023

Cement and Concrete Composites

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Study of mechanical, durability and microstructural properties of cementitious composite with addition of different iron ore tailings from Brazil

Cited by 18 publications

References 34 publications

The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand

The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand

Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

Effect of a novel spherical tailings aggregate on the macro- and mesoscopic properties of pervious concrete

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