An experimental research on self-consolidating concrete using tungsten Mine Tailings

Kim, Yong Jic; Kim, Young Jin; Choi, Yun Wang

doi:10.1007/s12205-015-0196-4

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…The slump cone used in the test had a height of 300 mm, a top diameter of 100 and a bottom diameter of 200 mm. The detailed procedure for the slump test is descr as follows [22][23][24]: Initially, the necessary tools, including the concrete sample, a s slump cone, a metal rod, a trowel, scales, a measuring tape, and other equipment, w prepared. The concrete sample was prepared on-site and tested within 30 min of mix The concrete was poured into a clean, oil-free slump cone; filled to the top; and ge vibrated with a metal rod to remove air pockets and level the surface.…”

Section: Design Schemementioning

confidence: 99%

The Effect of Copper Tailings Sand on the Workability and Mechanical Properties of Concrete

Zhang,

Gao,

Wang

2024

Buildings

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Concrete materials are widely used in engineering projects, with fine aggregates (sand) being a key component currently in short supply. Copper tailings sand, a waste by-product of copper mining, accumulates in large quantities in tailings dams. Recycling and reusing this waste sand is crucial for environmental sustainability. This paper investigated the incorporation of copper tailings sand into concrete as a partial replacement for fine aggregates and evaluated its effects on concrete’s workability and mechanical properties. The experimental results indicate that the addition of copper tailings sand reduced the workability and compressive strength of concrete. Specifically, at a 60% substitution rate, the slump of the concrete was reduced by 15%, and the axial strength was closest to that of ordinary concrete, with a reduction of 2.5%. As the proportion of copper tailings sand increased from 0% to 80%, the average axial strength decreased from 37.3 MPa to 34.9 MPa, and stiffness decreased by approximately 6.43%. A complete stress–strain curve equation was proposed based on fitting relevant parameters, closely aligning with experimental data. Moderately adding tailings sand can help address the issue of large amounts of waste sand accumulating in tailings dams while maintaining acceptable concrete properties.

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Section: Design Schemementioning

confidence: 99%

The Effect of Copper Tailings Sand on the Workability and Mechanical Properties of Concrete

Zhang,

Gao,

Wang

2024

Buildings

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“…The chemical composition of tailings, as presented in Table 1, shows that some tailings have high silica content. In addition, the particle size of tailings is about the same size as cement particles, so some researchers [49][50][51][52] focus on the properties of concrete containing tailings as SCMs for partial replacement of cement.…”

Section: Utilization Of Tailings As Supplementary Cementitious Materialsmentioning

confidence: 99%

Utilization of tailings in cement and concrete: A review

Gou

Zhou

Then

2019

Science and Engineering of Composite Materials

132

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One of the advantages of cement and the cement concrete industry in sustainability is the ability to utilize large amounts of industrial solid wastes such as fly ash and ground granulated blast furnace slag. Tailings are solid wastes of the ore beneficiation process in the extractive industry and are available in huge amounts in some countries. This paper reviews the potential utilization of tailings as a replacement for fine aggregates, as supplementary cementitious materials (SCMs) in mortar or concrete, and in the production of cement clinker. It was shown in previous research that while tailings had been used as a replacement for both fine aggregate and cement, the workability of mortar or concrete reduced. Also, at a constant water to cement ratio, the compressive strength of concrete increased with the tailings as fine aggregate. However, the compressive strength of concrete decreased as the replacement content of the tailings as SCMs increased, even whentailings were ground into smaller particles. Not much research has been dedicated to the durability of concrete with tailings, but it is beneficial for heavy metals in tailings to stabilize/solidify in concrete. The clinker can be produced by using the tailings, even if the tailings have a low SiO2 content. As a result, the utilization of tailings in cement and concrete will be good for the environment both in the solid waste processing and virgin materials using in the construction industry.

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“…In general, cement and normal aggregate have densities of 3140 kg/m 3 and 2240-2400 kg/m 3 , respectively. Thus, as the amount of cement and aggregates mixed increases, the self-weight of the building and the load increase accordingly [1][2][3][4]. Moreover, creep deformation under longterm and continuous load adversely affects the structure's durability.…”

Section: Introductionmentioning

confidence: 99%

Correlation Analysis of Ultrasonic Pulse Velocity and Mechanical Properties of Normal Aggregate and Lightweight Aggregate Concretes in 30–60 MPa Range

et al. 2022

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This study classified the strength of normal aggregate concrete (NC) and lightweight aggregate concrete (LC) into three levels (30, 45, and 60 MPa). In particular, the compressive strength, ultrasonic pulse velocity, and elastic modulus were measured and analyzed at the ages of 1, 3, 7, and 28 days to establish the correlation between the compressive strength and the ultrasonic pulse velocity and between the elastic modulus and the ultrasonic pulse velocity. In addition, this study proposed strength and elastic modulus prediction equations as functions of the ultrasonic pulse velocity. The developed equations were compared with previously proposed strength prediction equations. The results showed that the measured mechanical properties of NC tended to be higher at all ages than in LC. However, LC45 exhibited relatively high compressive strength compared to NC45. The relative mechanical properties of LC compared to NC were the highest at 45 MPa and the lowest at 60 MPa. The relative ultrasonic pulse velocity converged at all levels as the age increased. Moreover, the correlation between the compressive strength and the ultrasonic pulse velocity in LC exceeded that of NC, and in LC, the correlation coefficient decreased as the strength increased. The correlation coefficients between the elastic modulus and the ultrasonic pulse velocity were high at all levels except for LC45. Finally, this study proposed compressive strength and elastic modulus prediction equations as an exponential function of LC. The proposed equations outperformed the previously proposed strength prediction equations.

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An experimental research on self-consolidating concrete using tungsten Mine Tailings

Cited by 8 publications

References 17 publications

The Effect of Copper Tailings Sand on the Workability and Mechanical Properties of Concrete

The Effect of Copper Tailings Sand on the Workability and Mechanical Properties of Concrete

Utilization of tailings in cement and concrete: A review

Correlation Analysis of Ultrasonic Pulse Velocity and Mechanical Properties of Normal Aggregate and Lightweight Aggregate Concretes in 30–60 MPa Range

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