Origin and magmatic evolution of the Quaternary syn-collision alkali basalts and related rocks from Salmas, northwestern Iran

Fazlnia, Abdolnaser

doi:10.1016/j.lithos.2019.07.001

Cited by 8 publications

(2 citation statements)

References 71 publications

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“…σ 1 is the peak stress (MPa). Finally, Equation ( 18) is brought into Equation (17), and the calculations are checked.…”

Section: Damage Modeling Ofmentioning

confidence: 99%

“…Synthetic fibers are not only expensive, but their production process easily causes a waste of resources and is very likely to endanger people's health [16]. Basalt fiber (BF) is a mineral fiber that exists in volcanic rock [17], belonging to the natural fiber, and because of its excellent mechanical properties and affordability, comprehensive cost-effectiveness is very high [18][19][20] and, in line with the requirements of green environmental protection, it has gradually received attention. At present, scholars have performed many experimental studies on basalt fibers to improve the mechanical properties of concrete [21][22][23][24][25], but there are fewer studies on various aspects of the mechanical properties of the cemented tailings backfilling with basalt fibers (BFCTB), so it is necessary to carry out the corresponding research in this area to promote the application of basalt fibers in the field of tailing sand filler with reference value and guiding significance.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Energy Damage Evolution Mechanism of Basalt Fiber-Modified Tailing Sand Cementation and Filling Body Mechanics

Chen,

Zhang

2024

Buildings

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In order to investigate the mechanical properties of basalt fiber-doped tailing sand cemented filler and the evolution of energy damage, a uniaxial compression test was carried out on the basalt fiber-doped tailing sand cemented filler specimens to analyze the energy dissipation characteristics, and the damage constitutive equations with different basalt fiber contents were established based on damage mechanics. The results show that with the increase of fiber doping and fiber length, the uniaxial compressive strength and ductility of the filling body show a trend of increasing and then decreasing; the optimal value of fiber doping is 0.6%, and the optimal value of fiber length is 9 mm; the total strain energy, elastic strain energy and dissipation energy of basalt fiber-modified tailing sand cemented filling body at peak stress show a trend of increasing and then decreasing, and the energy dissipation energy of the filling body shows a trend of increasing and then decreasing. The energy dissipation energy shows a trend of increasing and then decreasing, and the energy dissipation energy shows a trend of increasing and then decreasing. The total strain energy, elastic strain energy, and dissipation energy at the peak stress show a trend of decreasing after increasing with the fiber doping and fiber length, and the energy damage evolution process can be divided into four stages: no damage stage, stable damage development stage, accelerated damage growth stage, and damage destruction; in addition, the existing damage constitutive model of the fiber-filled body was optimized, and the damage correction factor was introduced to obtain the damage constitutive model of the filled body with different fiber contents, and finally, after the verification of experimental and theoretical models, it was found that the two stress–strain curves coincided well. Finally, after the test and theoretical model verification, it is found that the stress–strain curves of the two are in good agreement, which indicates that the established theoretical model has a certain reference value for engineering practice, and at the same time, it has certain limitations.

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“…σ 1 is the peak stress (MPa). Finally, Equation ( 18) is brought into Equation (17), and the calculations are checked.…”

Section: Damage Modeling Ofmentioning

confidence: 99%