— Basalt fibers BFs are formed by drawing molten basalt one of the most widely distributed volcanic rocks on the earth for which the primitive magma originates from the upper mantle 1 at high temperatures ranging from 1450 to 1500° BFs have excellent mechanical and physical properties 2 10 such as excellent acid and alkali
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— The force that resists the motion of a body rolling on a surface is called the rolling resistance or the rolling The rolling resistance can be expressed by the generic equation F r = c W 1 where F r = rolling resistance or rolling friction N lb f c = rolling resistance coefficient dimensionless coefficient of rolling friction CRF
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— Here we report density functional theory based simulations of model basalt hydrous model basalt and near MORB to assess the effects of iron and water on the melt structure and density respectively
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— Loss coefficients for fittings and valves often denoted as "K values" or "Cv values " are numerical factors used in fluid mechanics to quantify the pressure loss or resistance that occurs as a fluid flows through these components in a piping system These coefficients are used by engineers and designers to assess the performance of a system
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— Here we present empirical data for a basalt showing thermal conductivity ranging from ± W m −1 K −1 at K to ± W m −1 K −1 at K Previous work reports much lower values in this range which may be due to the fragmented nature of the previous research the use of powdered samples for some data and the
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— Contaminant distribution coefficients determined under saturated conditions are often used to model transport under unsaturated conditions Although the distribution coefficients are assumed to be consistent under different moisture conditions this is rarely tested Column and batch adsorption tests were used to determine strontium
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— Considering the basalt fiber reinforced specimens containing 15% RHA and 3% C shown in Fig 11 a c it is noteworthy that the influence on the c v and k depended on the extent of the interfacial contacts and the presence of loose materials as will be discussed in this section Up front it was observed that the smooth basalt fiber surfaces
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Basalt Splitt 32 65 mm schwarz grau lose Dieser Artikel ist auch als BIG BAG verfügbar BASALT Gesteinsart und besteht in erster Linie aus Eisen und Magnesiumsilikaten Basalt hat eine meist feinkörnige und homogene Struktur Die Färbung variiert zwischen Dunkelgrau und Schwarz
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— Table 1 Coefficients of Friction of Various Roadway Surfaces Noon 1994 Surface Type Coefficient of Friction μ Gravel and dirt road Wet grassy field Dry asphaltic concrete Wet asphaltic concrete Dry concrete Wet concrete Snow Ice Loose moist dirt that allows tyre to sink about 5 cm
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3 — Loose Cubic Yards LCY /Loose Cubic Meters LCM Material which has been excavated in some way and swelled as a result of the space that now exist between its elements Compact Cubic Yards CCY /Compact Cubic Meters CCM Material which has been compacted and become more dense as a result
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experimental results for coefficients of Restitution" International Journal of rock mechanics and mining sciences and geomechanics Vol 35 Section 4 5 1996 pp662 663 Limestone on bare uniform talus slope formed of basalt fragments with a modal size of 5 cm Calculated from historic rockfall Hedley southern interior of
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The loss coefficient ζ is a dimensionless number characteristic coefficient to calculate the head loss H L see Pressure loss v Characteristic flow velocity in the relevant hydraulic component usually the flow velocity in the cross section of the connection downstream of the component g Acceleration due to gravity
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Expedition MV1203 aims to dredge 40 seamounts along the southwest portion of the Walvis Ridge seamount trail The Walvis Ridge begins on the African continent and extends to near the mid Atlantic Ridge The southwest half of the Walvis Ridge appears to bifurcate into two distinct physical and geochemical trends the Tristan northern and Gough southern
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Measurements of the Coefficient of Restitution of Quartz Sand on Basalt Implications for Abrasion Rates on Earth and Mars Knowledge of the rates at which rocks abrade from the impact of saltating sand provides important input into estimating the age and degree of modification of arid surfaces on Earth and Mars Previous work has relied on measuring
— Rockfall often collides with the slope during the movement on a slope surface and the energy dissipation of rockfall collision is used to quantify by the coefficient of restitution COR in analysing rockfall trajectory The coefficient of restitution is one of the most crucial parameters in analysing rockfall hazard and it can be obtained by field test
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— In slope stability analysis the slope stability safety factor proposed by Bishop [] in the limit equilibrium method was the et al [] proposed the concept of the shear strength reduction coefficient which is essentially the same when he studied the elastic plastic finite element numerical analysis of the external load
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— Column and batch adsorption tests were used to determine strontium distribution coefficients in crushed basalt Column tests were conducted at saturated and unsaturated moisture contents
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— examined the thermal expansion coefficient of Glass FRP Carbon FRP Aramid FRP and Basalt FRP bars and concrete The longitudinal coefficients of thermal expansion values of GFRP CFRP AFRP BFRP bars were x 10 6/oC x 10 6/oC x 10 6/oC and x 10 6/oC The transverse coefficients of thermal expansion
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— Loss coefficients for fittings and valves often denoted as "K values" or "Cv values " are numerical factors used in fluid mechanics to quantify the pressure loss or resistance that occurs as a fluid flows through these components in a piping system These coefficients are used by engineers and designers to assess the performance of a system
— Rockfall often collides with the slope during the movement on a slope surface and the energy dissipation of rockfall collision is used to quantify by the coefficient of restitution COR in analysing rockfall trajectory The coefficient of restitution is one of the most crucial parameters in analysing rockfall hazard and it can be obtained by field test
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