☆ 4.7 Article

Predicting long-term impact of cementitious mine fill considering sand as a copper-tailings substitution

POWDER TECHNOLOGY (2023)

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Summary: Pb(II)-containing tailings pose significant environmental hazards, and their rational and harmless treatment is crucial for the development of green mining. Cemented paste backfill (CPB) plays a vital role in large-scale tailings disposal. However, the presence of Pb(II) in tailings hinders the hydration reaction of ordinary Portland cement (OPC), leading to reduced early strength of CPB and hampering mining operations. In this study, carbon nanotubes (CNTs) were used to optimize the properties of CPB, leading to accelerated OPC hydration and the formation of a more compact CPB structure. This resulted in improved early strength of CPB and enhanced immobilization of Pb(II).

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Bo Gao et al.

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Summary: This study evaluated the strength development and pore structure changes of cementitious mine backfill (CMB) using ultrasonic pulse velocity (UPV) technique. The influence of different types of pyritic tailings on the quality of filling specimens was investigated. The results showed that the total porosity of CMBs decreased with increasing age and binder ratio. The acidic nature of low pH tailings negatively affected the aged strength of CMBs, but these negative effects decreased with slag substitution and high binder dosages. Excellent correlation curves were found between UPV and UCS.

CONSTRUCTION AND BUILDING MATERIALS (2023)

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Haiqiang Jiang et al.

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CONSTRUCTION AND BUILDING MATERIALS (2023)

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Long-term ageing characteristics of cemented paste backfill: Usability of sand as a partial substitute of hazardous tailings

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Summary: This study aims to improve the long-term filling performance of cemented paste backfill (CPB) and reduce cement-related costs and environmental risks by partially substituting tailings with sand. The experimental results showed that using sand as a substitute for tailings in CPB can increase its strength and improve its structure. Additionally, sand contributes to the hydration reactions of cement and prevents acid/leach formations that may occur in the long-term ageing. Overall, the use of sand enhances the performance of CPB and reduces the environmental impacts of tailings.

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POWDER TECHNOLOGY (2023)

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Summary: This study investigates the effect of carbon nanotubes (CNTs) on the strength behavior of cementitious tailings backfill (CTB). The results show that CNTs significantly improve the strength and microstructure of CTB by inhibiting crack expansion and enhancing material integrity. Among them, ordinary multi-walled CNT (CNTPL) has the most significant impact on the mechanical properties of CTB. In conclusion, this study demonstrates that using the fractal properties of microstructure can better estimate the strength development of CTB specimens reinforced with different types of CNTs.

CONSTRUCTION AND BUILDING MATERIALS (2023)

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Tugrul Kasap et al.

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Effects of mineral additives and age on microstructure evolution and durability properties of sand-reinforced cementitious mine backfills

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Assessment of rheological and sedimentation characteristics of fresh cemented tailings backfill slurry

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Effect of water saturation on mechanical characteristics and damage behavior of cemented paste backfill

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ULTRASONICS (2020)

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Strength development and microstructural investigation of lead-zinc mill tailings based paste backfill with fly ash as alternative binder

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CEMENT & CONCRETE COMPOSITES (2020)

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Evaluation of Condition of Concrete Structures Using Ultrasonic Pulse Velocity Method

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APPLIED SCIENCES-BASEL (2020)

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Effects of red mud additions on gangue-cemented paste backfill properties

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POWDER TECHNOLOGY (2020)

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Experimental and Statistical Study on Mechanical Characteristics of Geopolymer Concrete

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Influence of Hydrofluoric Acid Leaching and Roasting on Mineralogical Phase Transformation of Pyrite in Sulfidic Mine Tailings

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MINERALS (2020)

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Article Construction & Building Technology

Characterization of early age behavior of cemented paste backfill through the magnitude and frequency spectrum of ultrasonic P-wave

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CONSTRUCTION AND BUILDING MATERIALS (2020)

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Article Mechanics

Effects of curing time, cement content, and saturation state on mode-I fracture toughness of cemented paste backfill

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ENGINEERING FRACTURE MECHANICS (2020)

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Article Materials Science, Multidisciplinary

Strength and deformation behavior of cemented foam backfill in sub-zero environment

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JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2020)

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Article Chemistry, Physical

Topographic characterization of zirconia-based ceramics by atomic force microscopy: A case study on different laser irradiations

Mehdi Fattahi et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2020)

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Article Engineering, Chemical

Effect of superfine blast furnace slags on the binary cement containing high-volume fly ash

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POWDER TECHNOLOGY (2020)

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Article Engineering, Chemical

Effect of mineral admixtures on flow properties of fresh cemented paste backfill: Assessment of time dependency and thixotropy

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POWDER TECHNOLOGY (2020)

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Article Construction & Building Technology

Effect of external sulfate attack on the mechanical behavior of cemented paste backfill

Yong Wang et al.

CONSTRUCTION AND BUILDING MATERIALS (2020)

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Article Construction & Building Technology

Effect of tailings fineness on flow, strength, ultrasonic and microstructure characteristics of cemented paste backfill

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CONSTRUCTION AND BUILDING MATERIALS (2020)

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Article Green & Sustainable Science & Technology

Experimental study of the short-term pressures of uncemented paste backfill with different solid contents for barricade design

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JOURNAL OF CLEANER PRODUCTION (2020)

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Proceedings Paper Materials Science, Multidisciplinary

Experimental investigation on bacterial concrete strength with Bacillus subtilis and crushed stone dust aggregate based on ultrasonic pulse velocity

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MATERIALS TODAY-PROCEEDINGS (2020)

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Article Construction & Building Technology

An experimental study on compressive behaviour of cemented rockfill

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CONSTRUCTION AND BUILDING MATERIALS (2019)

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Article Environmental Sciences

Characterization of lead-zinc mill tailings, fly ash and their mixtures for paste backfilling in underground metalliferous mines

Santosh Kumar Behera et al.

ENVIRONMENTAL EARTH SCIENCES (2019)

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Article Computer Science, Artificial Intelligence

Estimation of the degree of hydration of concrete through automated machine learning based microstructure analysis - A study on effect of image magnification

Srikanth Sagar Bangaru et al.

ADVANCED ENGINEERING INFORMATICS (2019)

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Multiscale surface texture and fractal analysis of straight bevel gears finished by PECH and PECF process

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MATERIALS AND MANUFACTURING PROCESSES (2019)

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Article Chemistry, Physical

The effect of different laser irradiation on rugometric and microtopographic features in zirconia ceramics: Study of surface statistical metrics

Shahram Solaymani et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2018)

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Article Green & Sustainable Science & Technology

A strength prediction model using artificial intelligence for recycling waste tailings as cemented paste backfill

Chongchong Qi et al.

JOURNAL OF CLEANER PRODUCTION (2018)

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Article Engineering, Environmental

Utilization of red mud and Pb/Zn smelter waste for the synthesis of a red mud-based cementitious material

Yuan-Cheng Li et al.

JOURNAL OF HAZARDOUS MATERIALS (2018)

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Prediction of compressive strength and ultrasonic pulse velocity of fiber reinforced concrete incorporating nano silica using heuristic regression methods

Ali Ashrafian et al.

CONSTRUCTION AND BUILDING MATERIALS (2018)

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Article Engineering, Chemical

Effect of filling interval time on the mechanical strength and ultrasonic properties of cemented coarse tailing backfill

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INTERNATIONAL JOURNAL OF MINERAL PROCESSING (2017)

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Dynamic acousto-elastic testing of concrete with a coda-wave probe: comparison with standard linear and nonlinear ultrasonic techniques

Parisa Shokouhi et al.

ULTRASONICS (2017)

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Article Construction & Building Technology

Freezing behaviour of cemented paste backfill material in column experiments

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CONSTRUCTION AND BUILDING MATERIALS (2017)

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The heterogeneous nature of bleeding in cement pastes

Nadia Massoussi et al.

CEMENT AND CONCRETE RESEARCH (2017)

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Article Engineering, Chemical

Yield stress of cemented paste backfill in sub-zero environments: Experimental results

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MINERALS ENGINEERING (2016)

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Article Polymer Science

Morphology and Optical Properties of SiO2-Based Composite Thin Films with Immobilized Terbium(III) Complex with a Biscoumarin Derivative

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INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION (2015)

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Article Acoustics

Ultrasonic pulse velocity for the evaluation of physical and mechanical properties of a highly porous building limestone

Emilia Vasanelli et al.

ULTRASONICS (2015)

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Article Mineralogy

Study of physico-chemical and mechanical characteristics of consolidated and unconsolidated cemented paste backfills

Erol Yilmaz et al.

GOSPODARKA SUROWCAMI MINERALNYMI-MINERAL RESOURCES MANAGEMENT (2013)

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Prediction of the strength of mineral admixture concrete using multivariable regression analysis and an artificial neural network

U. Atici

EXPERT SYSTEMS WITH APPLICATIONS (2011)

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