Synthesis and influencing factors of high-performance concrete based on copper tailings for efficient solidification of heavy metals

Xie, Ruosong; Li, Zhishuncheng; Qu, Guangfei; Zhang, Yingjie; Xu, Youxiao; Zeng, Yong; Li, Ziying

doi:10.1016/j.jenvman.2022.116469

Cited by 15 publications

(10 citation statements)

References 27 publications

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“…In addition, the density of this specimen is more important than the conventional concrete at 28 days. Furthermore, copper tailings were valorized as sand for the formulation of high-strength concrete [60]. The results indicated that using a 60% replacement of natural sand leads to a compressive strength of 85 MPa and a flexural strength of up to 12.5 MPa.…”

Section: Copper Mine Tailings (Cmt)mentioning

confidence: 99%

“…Copper tailings were used as FA in HPC at a 60% replacement ratio. The 28 days UCS and flexural strength reached 84 MPa and 12.5 MPa, respectively [60]. Xie et al [79] successfully incorporated copper tailings in HPC to solidify heavy metals, as shown by the short-and long-term leaching rates of Cu, Cr, Zn, and Pb that were less than the environmental Chinese regulations limits.…”

Section: Mine Wastes-based High-and Ultra-high-performance Concretesmentioning

confidence: 99%

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Recycling of Mine Wastes in the Concrete Industry: A Review

El Machi,

El Berdai,

Mabroum

et al. 2024

Buildings

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The mining industry generates a substantial amount of waste materials, including tailings and waste rocks, which, if not managed correctly, pose threats to the environment and public health due to their long-term accumulation and disposal. Simultaneously, the construction sector consumes important amounts of natural resources like water and rocks. However, research shows that inert mining waste can serve as a substitute for conventional raw materials in construction, particularly in concrete. This review focuses on using mining waste as an alternative to concrete technology to promote cleaner practices in construction and circular economy in mining. Mining waste, with its physical characteristics and chemical composition, can function as diverse components in concrete, such as sand, aggregates, and binders. This article assesses these properties and explores their incorporation into concrete production, aiming to stimulate further research and development, foster environmentally responsible approaches, and underline the direct link to reaching SDGs to achieve sustainability in the construction industry.

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Section: Copper Mine Tailings (Cmt)mentioning

confidence: 99%

Section: Mine Wastes-based High-and Ultra-high-performance Concretesmentioning

confidence: 99%

Recycling of Mine Wastes in the Concrete Industry: A Review

El Machi,

El Berdai,

Mabroum

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…These samples were stored for three days before assessing their elasticity and durability performances. A 1500 kN SATEC™ Series 1500 HDX (Norwood, MA, US) was utilized to measure these parameters effectively [42][43][44][45][46] .…”

Section: Examining Elasticity Deformation and Durabilitymentioning

confidence: 99%

Application of Sulfur-2,4-dinitrophenylhydrazine as Modifier for Producing an Advantageous Concrete

Turaev,

Shavkatova,

Amanova

et al. 2023

Baghdad Sci.J

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In this investigative endeavor, a novel concrete variety incorporating sulfur-2,4-dinitrophenylhydrazine modification was developed, and its diverse attributes were explored. This innovative concrete was produced using sulfur-2,4-dinitrophenylhydrazine modification and an array of components. The newly created sulfur-2,4-dinitrophenylhydrazine modifier was synthesized. The surface texture resulting from this modifier was examined using SEM and EDS techniques. The component ratios within concrete, chemical and physical traits derived from the sulfur-2,4-dinitrophenylhydrazine modifier, chemical and corrosion resistance of concrete, concrete stability against water absorption, concrete resilience against freezing, physical and mechanical properties, durability, elastic modulus, and thermal expansion coefficient of the examined sulfur-infused concrete were assessed. The acquired results also substantiated that the thermal expansion coefficient value for sulfur-2,4-dinitrophenylhydrazine modified concrete was 14.8×10-6/0C. The average deformation of the analyzed concrete was 0.0026-0.0051, indicating a superior deformation performance compared to conventional concretes. Concrete with smaller aggregate sizes exhibited greater density, specifically 2283 kg/m3. The concrete density decreased gradually with an increase in aggregate size. The stability of sulfur-2,4-dinitrophenylhydrazine modified concrete was remarkably high in various aggressive environments. EDS analysis revealed that carbon atoms constituted 56.63% of the total mass, while sulfur made up 33.91% of the total mass. The obtained SEM outcomes demonstrated that the sulfur-2,4-dinitrophenylhydrazine modifier exhibited a more porous structure, devoid of crystalline formations. The sulfur-2,4-dinitrophenylhydrazine modification experienced a single-stage thermal mass loss, with the mass loss events being endothermic in nature. The IR findings verified the presence of amino functional groups (connected melamine ring) and the establishment of polymer sulfur chains.

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“…However, not all components of mine tailings are harmful; valuable metal elements in the tailings could be recycled and reused [15]. Most mine tailings contain minerals such as aluminum, calcium, and silicates, which could be used to develop related building material products [16,17]. Thus, the resource utilization of tailings and the development of related building materials are key to addressing resource waste and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Copper–Molybdenum Tailings to Enhance the Compressive Strength of Alkali-Activated Slag-Fly Ash System

Wang,

Gu,

Wang

et al. 2024

Buildings

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Utilizing a variety of solid wastes to prepare alkali-activated cementitious materials is one of the principal trends in the development of cementitious materials. Commonly used alkali activation precursors such as granulated blast furnace slag (GBFS) and fly ash (FA) will be less available due to resource pressures. Supply limitation is an important reason to research alternative precursors. To realize the high value-added utilization of copper–molybdenum tailings (CMTs), this study adopted the modified sodium silicate solution as an alkaline activator to activate GBFS-FA-CMTs cementitious system to prepare alkali-activated cementitious materials. The influence of CMTs content on the compressive strength of GBFS-FA-CMTs cementitious system was analyzed, and the mechanism of GBFS-FA-CMTs cementitious system was also analyzed through hydration product types, physical phase composition, and microscopic morphology. The results indicated that a paste with the incorporation of CMTs, S50F30C20 (50% GBFS, 30% FA, 20% CMTs), achieved the highest compressive strength of 79.14 MPa, which was due to the filling effect of the CMTs and the degree of participation in the reaction. Pastes with different contents of CMTs, while maintaining a constant CBFS content, exhibited similar strength development. Excessive amounts of CMTs could result in reduced compressive strength. Microstructural analysis revealed that the hydration products were structurally altered by the addition of CMTs. In addition to ettringite, quartz, C(-N)-S-H gel, and calcite, gaylussite was also formed; moreover, the mass of chemically bound water increased, and the microstructure of reaction products became denser. An excess of CMTs may restrict the growth of the hydration gel, leading to more microstructural defects. The study suggests that CMTs could enhance the compressive strength of hardened paste within an alkali-activated slag-fly ash system, possibly due to a filling effect and participation in the chemical reaction. This research confirms the feasibility of using CMTs in alkali-activated cementitious materials.

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Synthesis and influencing factors of high-performance concrete based on copper tailings for efficient solidification of heavy metals

Cited by 15 publications

References 27 publications

Recycling of Mine Wastes in the Concrete Industry: A Review

Recycling of Mine Wastes in the Concrete Industry: A Review

Application of Sulfur-2,4-dinitrophenylhydrazine as Modifier for Producing an Advantageous Concrete

Utilization of Copper–Molybdenum Tailings to Enhance the Compressive Strength of Alkali-Activated Slag-Fly Ash System

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