Recycling of manganese gangue materials from waste-dumps in the Iberian Pyrite Belt – Application as filler for concrete production

Andújar, Francisco Jesús Salguero; Grande, J. A.; Valente, Teresa Maria Fernandes; Garrido, Rocío Hernández; Torre, M. L. de la; Garrido, Juan Carlos Fortes; Sánchez, Á.

doi:10.1016/j.conbuildmat.2013.12.082

Cited by 43 publications

(23 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the west, some developed countries firstly carried on comprehensive utilization of gangue, until the late 1960s, wide attention was caused all over the world [3]. Some studies have shown that spontaneous combustion gangue can be utilized in concrete as aggregates [4][5][6][7][8][9][10][11][12], only needing to crush and screen. Aggregates take up about 70% volume of concrete, compared to other ways to apply spontaneous combustion gangue, it is reasonable, efficient and green way for gangue utilization in building materials field, and its economic and environmental benefits are also quite remarkable.…”

Section: Introductionmentioning

confidence: 99%

Study on Flexural Properties of Reinforced Spontaneous Combustion Gangue Concrete Beams

Wang

Zhou

2017

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Study on Flexural Properties of Reinforced Spontaneous Combustion Gangue Concrete Beams

Wang

Zhou

2017

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

show abstract

“…Manganese exploitation was both by underground and open-cut mining methods. The majority of exploitations were of small size, with the highest mining interest focused on oxides in chert [2]. Ambitious and irrational mining contributed to high volume waste dumps very rich in silica, since the siliceous ores were often neglected.…”

Section: Study Areamentioning

confidence: 99%

“…In fact, stress-strain tests performed with concrete doped with Mn-wastes as filler [2] already indicated good performance regarding resistance to compression.…”

Section: Chemical Composition Of the Mn-wastesmentioning

confidence: 99%

“…On the other hand, the mineralogy and chemistry of such wastes may be indicative of its potential to be used as aggregates for concrete production. Silica is generally the major component of chert gangue, representing more than 80% in accordance with [2]. This siliceous composition associated with low levels of alkalis and aluminium and some proportion of iron and manganese [3] may raise the interest in recycling such wastes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING

Valente¹,

Grande²,

Andújar³

et al. 2014

SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings

View full text Add to dashboard Cite

The present work aims to evaluate the possibility of achieving an environmental and economic valorisation of Mn-wastes through their recycling for concrete production. The study area is located in the Spanish sector of the Iberian Pyrite Belt (IPB), where there are numerous abandoned mine-waste dumps, resulted from exploitation of manganese mines. The methodological approach included field surveys for elaborating an inventory and a general map of all the abandoned exploitations, remote sensing methods for identifying old mines and for estimation of affected areas; and laboratory analyses for characterizing the mine wastes regarding evaluation of their potential as filler for concrete production. The obtained results indicated the existence of 149 mines, representing a total affected area of 235 ha. Among these waste dumps, about eleven of them have more than 10 000 m 3 of Mn-gangue with chemical composition compatible with the normative for concrete production. The recycling of such wastes may accomplish two main purposes: to supply the market with low cost aggregates and, simultaneously, to contribute for the environmental rehabilitation of the affected areas.

show abstract

“…Piled-up waste CG consumes land resources, seriously pollutes vegetation, soil, and water bodies [1][2][3][4][5]. In order to enhance the utilization rate of CG, many scholars have studied the properties of CG and found the performance of CG is reliable when using it directly or combined with other road materials [6][7][8][9][10][11]. The main factors affecting the subgrade stability are the components of the coal gangue, the additive materials, the optimum water contents, the subgrade structures, the construction compaction, loads, etc.…”

Section: Introductionmentioning

confidence: 99%

Embankment Displacement PLAXIS Simulation and Microstructural Behavior of Treated-Coal Gangue

Yang

Zhang²,

Li³

2020

Minerals

View full text Add to dashboard Cite

The purpose of this study is to investigate the displacement of coal gangue filling material in road construction and microstructural behavior of treated coal gangue by considering the environmental factors of aqueous solutions with different acidity. The displacement analysis of the coal gangue embankment model has been done by means of the finite element method PLAXIS. Furthermore, using the scanning electron microscope, the energy dispersive system, and the Raman spectrometer to analyze the microscopic mechanism in the view of microstructure, elements, the integrity of carbon structure and the stability of chemical bonds of coal gangue. The results show that the larger displacement of the treated coal gangue subgrade is within 4.0 m below the top of the subgrade, and the maximum displacement value is about 7 mm, which is less than the displacement of untreated coal gangue sample. While the treated A-CG and T-CG grain size, surface area and internal friction angle increase, the unstable carbon structure is destroyed, so its shear strength, compression performance, and consolidation effect are improved. S-CG particles are coated with Na-Si-Al gel, which enhances the density, viscosity and shear strength, thus ensuring the stability of the coal gangue subgrade. The treated coal gangue subgrade slope foot displacement, boundary shear stress and safety factor are all meet the specification requirements.

show abstract

Recycling of manganese gangue materials from waste-dumps in the Iberian Pyrite Belt – Application as filler for concrete production

Cited by 43 publications

References 11 publications

Study on Flexural Properties of Reinforced Spontaneous Combustion Gangue Concrete Beams

Study on Flexural Properties of Reinforced Spontaneous Combustion Gangue Concrete Beams

14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING

Embankment Displacement PLAXIS Simulation and Microstructural Behavior of Treated-Coal Gangue

Contact Info

Product

Resources

About