Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites

Li, Jiajian; Cao, Shuai; Yilmaz, Erol

doi:10.1007/s12613-021-2351-x

Cited by 83 publications

(13 citation statements)

References 42 publications

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“…In the Triassic period (220~200 Ma), the tectonic setting of South China underwent post-collisional extension. The veintype tungsten deposits formed at this time period were generally related to peraluminous granite magma triggered by crustal heating [9,88,89]. The Triassic wolframite-quartz veintype deposits were previously believed to be of less economic significance due to their relatively rarer occurrences and smaller scales.…”

Section: Multiple-aged Granitoid and Related Wolframite-quartz Veinsmentioning

confidence: 82%

“…Mineralization of these deposits generally consists of wolframite (dominantly FeWO 4 or MnWO 4 ) in subhorizontal centimeter-to meter-scale quartz veins with lateral extents of hundreds of meters. The significant advantages of this type of tungsten deposit other than scheelite skarn are not only that it is easier for mining, but also due to the specialty of wolframite, which are more amenable to mineral processing [9]. In China, the exploitation of wolframite-quartz veins can be traced back to the Song Dynasty.…”

Section: Introductionmentioning

confidence: 99%

“…The selective appearance of CO 2 -rich fluids in different ore deposits brings confusion to the role of volatiles in mineralization [4,6,17]. In addition, the source of ore-forming materials is also debated between magma and wall rocks [9,13]. Moreover, simple cooling of ore-forming fluid, fluid mixing, fluid-rock interaction and fluid boiling were put forward to explain the mechanism controlling wolframite deposition, and there is still no unified conclusion [4,6,9,13,15,17].…”

Section: Introductionmentioning

confidence: 99%

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Fluid Processes of Wolframite-Quartz Vein Systems: Progresses and Challenges

Pan

et al. 2022

Minerals

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Wolframite-quartz vein-type tungsten deposits constitute the world’s major tungsten resources and are integral to tungsten production. A major share of this mineralization product is found in Southeast China, with other significant resources in the Central Andean belt, the East Australian belt, the Karagwe-Ankole belt and the European Variscan belt. In the past few decades, extensive studies on wolframite-quartz vein-type tungsten deposits have been conducted, but many key questions concerning their ore-forming fluid and metallogenic mechanism remain unclear. Additionally, a summary work on the global distribution and fluid characteristics of these wolframite-quartz vein-type tungsten deposits is still lacking. In this contribution, recent progress regarding several major issues related to the fluid processes involved in the forming of these veins are overviewed, and challenges in terms of future research are proposed. These issues include the nature of ore-forming fluids, their sources, and their transportation and wolframite deposition mechanisms. In particular, the affinity between veins and the exposed granitic intrusion from the Zhangtiantang-Xihuashan ore district, where an as-yet undiscovered deep intrusion, rather than the exposed granitic intrusion, was probably responsible for the formation of the wolframite-quartz veins, is reevaluated. This study also reviews the existing fluid and melt inclusion data from several tungsten deposits to address whether the mineralization potential of the magmatic-hydrothermal systems was directly correlated with the metal contents in the granitic melts and the exsolving fluids.

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Section: Multiple-aged Granitoid and Related Wolframite-quartz Veinsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fluid Processes of Wolframite-Quartz Vein Systems: Progresses and Challenges

Pan

et al. 2022

Minerals

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“…SFRC can be incorporated into more complex composites using, for example, steel profiles [ 13 ]. Studies of compressive fatigue behavior and failure evolution with similar materials use digital image correlates to determine deformation and strain [ 14 ]. The growing interest in SFRC has led researchers to investigate the problem of bonding between fiber and concrete matrix.…”

Section: Introductionmentioning

confidence: 99%

Application of X-ray Computed Tomography to Verify Bond Failures Mechanism of Fiber-Reinforced Fine-Grain Concrete

et al. 2022

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This paper proposes the use of X-ray computed tomography (µCT, xCT) measurements together with finite element method (FEM) numerical modelling to assess bond failures mechanism of fiber-reinforced fine-grain concrete. Fiber-reinforced concrete is becoming popular for application in civil engineering structures. A dynamically developing topic related to concretes is the determination of bond characteristics. Nowadays, modern technologies allow inspecting the inside of the element without the need to damage its structure. This paper discusses the application of computed tomography in order to identify damage occurring in the structure of fiber-reinforced fine-grain concrete during bond failure tests. The publication is part of a larger study to determine the bonding properties of Ukrainian steel fibers in fine-grain concrete. The authors focused on the visual evaluation of sections obtained from tomographic data. Separately, the results of volumetric analysis were presented to quantitatively assess the changes occurring in the matrix structure. Finite element analysis is an addition to the substantive part and allows us to compare real damage areas with theoretical stress concentration areas. The result of the work is the identification of a path that allows verification of the locations where matrix destruction occurs.

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“…Since then, the geopolymer technology has evolved to a wide range of potential raw materials. The research is focused on unutilized appropriated industrial, agriculture and municipal waste, such as fly and bottom ash, slag, tailings, red mud, biomass ash, sludge, construction waste, glass waste, agricultural waste, etc., [ 3 , 4 , 5 , 6 ]. The homogenization of the suited activator solution and aluminosilicate precursor yields geopolymer paste with properties similar to ordinary Portland cement (OPC) paste and, in particular cases, even superior.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Geopolymer Based on Fayalite Waste from Copper Production and Metakaolin

Nikolov

Karamanov

2022

Materials

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In the present study, thermal properties of geopolymer paste, based on fayalite waste from copper producing plants and metakaolin, were analyzed. The used activator solution was a mixture of sodium water glass, potassium hydroxide and water with the following molar ratio: SiO2/M2O = 1.08, H2O/M2O = 15.0 and K2O/Na2O = 1.75. High strength geopolymers pastes were evaluated after exposure to 400, 800 and 1150 °C. The physical properties (absolute and apparent density, water absorption) and compressive strength were determined on the initial and the heat treated samples. The phase composition, microstructure and spectroscopic characteristics were examined by XRD, SEM-EDS, FTIR and Mössbauer spectroscopy, respectively. The structure of the heat-treated geopolymers differs in the outer and inner layers of the specimens due to variation in the phase composition. The outer layer was characterized by a reddish color and more rigidity, while the inner core was black and less viscous at elevated temperatures. The results showed that geopolymer pastes based on fayalite are fire-resistant up to 1150 °C. Moreover, after heat treatment at this temperature, the compressive strength increased by 75% to 139 MPa, while water absorption reduced by about 9 times to 1.2%. These improvements are explained with the crystallization of the geopolymer gel to leucite and K,Na-sanidine, and substitutions of Al/Fe in the geopolymer gel and iron phases.

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Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites

Cited by 83 publications

References 42 publications

Fluid Processes of Wolframite-Quartz Vein Systems: Progresses and Challenges

Fluid Processes of Wolframite-Quartz Vein Systems: Progresses and Challenges

Application of X-ray Computed Tomography to Verify Bond Failures Mechanism of Fiber-Reinforced Fine-Grain Concrete

Thermal Properties of Geopolymer Based on Fayalite Waste from Copper Production and Metakaolin

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