The shear modulus of the rock and the liquid CO 2-saturated basalt bulk modulus are not frequency dependent, whereas the bulk modulus of the basalt when fully saturated with water is frequency dependent. Measurements are compared with the water-saturated bulk modulus modeled using Gassmann's relation (x symbols).
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represents the elastic rock response. Using AE (acoustic emission) devices, it has been found that starting at point B microcracks develop in the rock sample and the sample experiences strain hardening. The ordinate of point B is called the yield stress by analogy with the response of concrete samples.
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If the rock is isotropic, two elastic constants can be introduced to describe its deformability: the Young's modulus, E, and the Poisson' s ratio, <, with. a are increments of stress, lateral strain …
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It is also compared with elastic modulus calculated from different codal provisions. The static modulus is lower than the dynamic modulus. Adding basalt fiber improves the ductile characteristics of fine-grained concrete but retards on GGBS addition due to the dilution effect of cement on greater percentages of replacement.
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Basalt melt velocity at high pressure modeled using a BM3-EoS from the data of Agee and Ohtani and Maeda (grey curve), velocity of basalt melt modeled using a BM3-EoS from Ueki and Iwamori (dotted curve), and the velocity of basalt/mafic melt modeled on the magnitude of the dv P /dρ observed in the silicate glasses at high pressure (red field).
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Basalt 145 50 347 25 207 82 395 3 Diabase, dolerite 229 88 384 13 152 81 537 5 Hyperite - - - - 245 108 441 2 ure Graywacke 81 25 310 12 - - - - ... E-modulus and the factor m i in the Hoek-Brown failure criterion for rock masses Average values from tests Tests of rocks world
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Aramid fibers (also known as aromatic polyamide fibers) have high strength, a high elastic modulus, and 40% lower density than glass fibers. The cost of aramid fibers is higher than glass and basalt fibers making them less common in structural applications.
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The elastic modulus of basalt is a significant engineering parameter required for many projects. Therefore, a total of 137 datasets of basalts from Digor-Kilittasi, Turkey, were …
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sandstone, fine-grained sandstone, schist, quartzite, basalt and granite are studied. Physical properties such as bulk density and porosity are evaluated of all samples. Static elastic modulus is determined by uniaxial compression test and dynamic elastic modulus is found out by ultrasonic pulse velocity testing.
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The elastic modulus is an important parameter in geotechnical engineering. Elastic modulus is calculated for both types of soil and rock formations as an elastic parameter most commonly …
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The elastic modulus of basalt is a signicant engineering parameter required for many projects. Therefore, a total of 137 datasets of basalts from Digor-Kilittasi, Turkey, were used to predict the elastic modulus of intact rock (E i) for this study. P
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The use of fiber reinforced polymer (FRP) rebar, particularly those using glass and basalt fiber, is rapidly becoming more common. These rebar are cost effective, corrosion resistant, lightweight, very strong and environmentally ... modulus of elasticity (Young's modulus) is much lower (6,000 ksi v. 29,000 ksi), as is its transverse shear ...
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Correlation between elastic Young's modulus E and uniaxial compressive strength σ c for various rock material. ... However, dense basalt magmas rise to the Earth's surface all the time, even ...
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Download scientific diagram | Modulus of elasticity of FRP bars. from publication: Tensile and Shear Testing of Basalt Fiber Reinforced Polymer (BFRP) and Hybrid Basalt/Carbon Fiber Reinforced ...
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The elastic modulus of the basalt fiber–reinforced FAGC samples were determined by Eq. (4). The elastic modulus of plain FAGC was found to be around 20.4 GPa, and that of the basalt fiber–reinforced FAGC specimens gradually increased with the increasing fiber content. When the fiber content was 0.025%, the elastic modulus was 21.04 GPa, and ...
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Basalt was used as an ornamental stone in many historic and ancient cities in Jordan. Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory ...
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The effects of coarse aggregate on the elastic modulus of UHPC are mainly related to the elastic modulus, content, and particle size of aggregate itself [22,23]. Piasta et al. [24] revealed that the use of high-strength and high-rigidity basalt coarse aggregate has a significant promoting effect on the elastic modulus of UHPC.
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Using the theory of elastic wave propagation, the dynamic Young's modulus, Ed, Poisson's ratio
The strength performance of basalt fibers improves, compared to glass fibers, with increasing temperature. The elastic modulus of basalt fibers is comparable to that of glass fibers, higher compared to E-type but lower compared to S-type. Elongation at break values is higher compared to carbon fiber but lower compared to glass one (Table 1.1).
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The use of basalt fibers promoted the elastic modulus of GC which showed the maximum peak load of about 1520 N. Finally, it was concluded that the use of BF improved the mechanical property of the specimens. b. Fracture energy and toughness were found to be higher for BFGC when compared to that of conventional GC. Use of 0.05% BF in concrete ...
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The main effects of BFs are the gap-filler effect, bridging effect, high tensile strength, and modulus of elasticity of the basalt fiber, which leads to improving the strength of BFRC, the most ...
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Finally the results of the Young’s modulus place the basalt fibers in between E-Glass fiber composites and Carbon fiber composites. References Alves, C., Ferrão, P. M. C., Silva, A. J., Reis, L. G., Freitas, M., Rodrigues, L. B., & Alves, D. E. (2010). ... The modulus of elasticity in compression is about 24% higher than the modulus ...
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The measured basalt elastic properties for different pore fluids are compared with estimates computed from three rock physics models for fluid substitution: Gassmann, KT, and the Mavko–Jizba approximation to local SF.
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In addition, dynamic modal tests were then conducted to determine the dynamic modulus of elasticity (MOE) and damping of the FRF concrete beams. The results indicate that concrete's toughness and crack resistance performance are significantly improved with added fiber in basalt fiber reinforced concrete, and the optimum fiber content is 0.25%.
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When basalt fiber is well dispersed in concrete, it enhances the reinforcement effect of fiber-reinforced concrete [32], [33], [34]. Due to its high tensile strength and elastic modulus, basalt fiber plays an important role in bridging cracks and can be used for load-bearing components in building construction [35].
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Moreover, the elastic modulus of FRP is typically less than that of steel (excepting some of CFRP have high Young's modulus). The FRP composites could be utilized as reinforcing with concrete in various shapes, inclusive of rebar, rod, tube, sheet, beam stirrup, plate, roving, and textile and mesh fabric.
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In case of tensional stress of a uniform bar (stress-strain curve), the Hooke's law describes behaviour of a bar in the elastic region. The Young's modulus of elasticity is the elastic modulus for tensile and compressive stress in the linear elasticity regime of a uniaxial deformation and is usually assessed by tensile tests.
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The IET is a dynamic method that uses the natural frequency of specific vibrations of each material [] and characterizes Young's modulus and the damping by the acoustic response after a slight inserted mechanical impulse.Upon receiving a defined stimulation, the material generates elastic, transverse, and twisted longitudinal oscillations.
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Lu et al.[4] conducted the tensile tests on basalt fibre at elevated temperatures and found that the temperatures increasing from room temperature to 2000C, the ultimate tensile strength and modulus of elasticity was reduced by 8.3% and 9.7% for …
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From uniaxial compression test, young's modulus of elasticity and Poisson's ratio of rock specimen are determined if the stress strain behaviour till peak is captured. The slope of the ... Basalt 20-80 0.1-0.2 70-300 10-30 4-20 Rhyolite 10-40 0.2-0.3 60-150 5-10 -- ...
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modulus of elasticity/ data collections/ tensile strength I I UNCLASSIFIED I c. COSATI Field/Group 08G 18. DISTRIBUTION STATEMENT ... Basalt,vesicular KoynaDamsite India 15 Basalt,glassy BlackCanyonDamsite Idaho 17 Basalt DryFallsDamsite Washington 19 (SouthCouleeDamsite)
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At the same strengths, the elastic modulus in the concrete with dolomite aggregate is higher than that in the concrete with basalt aggregate (Fig. 6) even though the modulus of the basalt rock is undoubtedly the highest (Table 8). There is a large difference between the moduli of concretes with dolomite and quartzite aggregates, in spite of the ...
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