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Online since: January 2021
Authors: Sandeep Chaudhary, Rajesh Gupta, Abhishek Jain, Sumit Choudhary
As summarized from the above studies, it can be noted that a large number of studies are available on rubberized concrete but as per author’s best knowledge, no study is there on rubberized functionally graded concrete (RFGC).
Grain size distribution Table 1.
Online since: October 2011
Authors: Gang Liu, Ali Baniyounes, Mohammad Rasul, Masud M. K. Khan
For most of this period, wind energy was used to power mechanical water pumps and in mills to grind a grain [12].
So to compute wind power density WPD accurately we have to take the summation of data taken over a period of time as in equation 6. 6 Where, n is the number of how many times wind speed has been recorded, and j are the readings of the air density ρ and wind speed V at time j.
Online since: March 2025
Authors: Markus Höfer, Peter Scholz, Kai Weigel, Christian Stein, Michal Cwikla, Maurycy Kempa, Sarah Baron, Mariusz Frankiewicz
Pulse duration Laser wavelength [nm] Line Overlap [%] Pulse Overlap [%] Fluence [J/cm2] Feed rate [mm/s] Scanning Velocity [mm/s] PRR [kHz] Number of Scans 3 ns 532 99.8 85 0.26 6.25 1500 500 4 10 ps 532 99.4 85 0.20 6.25 900 200 4 270 fs 515 99.2 85 0.14 27.5 3000 1000 4 To determine realistic values that reflect the tribological system between the blank holder and the sheet during deep drawing, flat strip drawing tests were conducted for each coating variation shown in Table 3 and Fig. 2.
In nanocrystaline CVD diamond coatings produced, laser light could be absorbed on the surface boundary becouse of significant amount of free electrons in the grain boundaries.
Online since: January 2013
Authors: Astrid Pundt, Ivan Procházka, Jakub Čížek, Gerhard Brauer, Franziska Traeger, Detlef Rogalla, Hans Werner Becker, Stefan Wagner, Helmut Uchida, Wolfgang Anwand, Marián Vlček, Martin Vlach, František Lukáč, Carsten Bähtz
In order to reduce the number of free parameters in fitting of hydrogen-loaded crystal (loaded side) the thickness of Pd cap was fixed at the value of 20 nm determined previously on the virgin crystal.
Obviously the Pd (111) reflection is rather broad due to nanocrystalline grain size and small thickness (20 nm) of Pd cap.
Online since: December 2013
Authors: Irina A. Kurzina, Pavel Musich, Alexander Vosmerikov, Natalia Kosova
In addition, DME has high cetane number (5560) exceeding the one for petroleum diesel fuel, and low boiling temperature (248 K).
Conditions: P=3 МPа, T = 553 К, H2/CO = 2, weight hour space velocity = 576 h–1 Catalysts Loading 1:1 1:1 2:3 2:1:2 1st layer of R-1, cm3 Mixture 2.5 2 2 2nd layer of (R-1 + g-Al2O3), cm3 – – 1 3rd layer of g-Al2O3, cm3 2.5 3 2 Catalytic properties CO conversion, % 76 36 30 65 DME yield, % 34 22 17 34 CO2 conversion, %vol. 12 7 5 11 СН4 concentration, %vol. <0.05 0.06 0.05 0.2 This is due to the fact that the catalyst grains are distributed chaotically in the reactor, and the flow of the passed reaction mixture of CO and H2 is able to convert into products (that is confirmed by 76% conversion).
Online since: June 2023
Authors: Hartono Yudo, Andi Haris Muhammad, Muhammad Iqbal, Difa Adani, Untung Budiarto
The Hardness Tester Karl Frank Type 38 50 is used for this evaluation, and the following formula is applied to calculate the Vickers hardness value or VHN (Vickers Hardness Number): VHN=2.P.Sinα2d2 kgmm2 (4) where, α = angle of the diamond pyramid (136o) d = diagonal trace of the penetrator (mm) = d1+d22 P = pressing load (kg), pressing load 1 to 120 kg, which is used at 30 kg ASTM E-92 ( Vickers Hardness of Metallic Materials ) Fig. 2.
The purpose of metallographic testing is to determine the microstructure of the material being examined by observing the shape of the image of the grain boundaries of the material under a microscope.
Online since: September 2023
Authors: Catalin Nicolae Tampu, Carol Schnakovszky, Valentín Miguel, Petrica Radu, Enrique García-Martínez
Uncoated, medium large grain sized tungsten carbide inserts (R390-11 T3 08E-KL H13A) with the following geometry: face land angle, α = 4O, rake angle, γ = 25O, corner radius, r = 0.8mm [11], equipped the 8 pockets of the mill.
· The obtained results are based on a reduced number of inputs, with a reduced level of variation, so the extension of study for new processing conditions, different types of tools and more complex geometries is necessary to get more conclusive results, with a greater applicability.
Online since: February 2016
Authors: Zhen Ming Zhang, Dong Xu Li
The ettringite grew firmly on the unhydrated and hydrated cement grains, and some parts of C–S–H gel were also present.
De Schutter and Kumar S [17,18], the finer furnace slag mixed into Portland cement, could consume a large number of C-H, which made contribution to the decline of C-H.
Online since: March 2019
Authors: Bernd-Arno Behrens, Dieter Bohr, Martin Bonhage, Deniz Duran
Steel remains practically rigid during friction welding which impedes its microstructural enhancement via dynamic recrystallization that is reported to be primary grain refinement mechanism in friction welding [11].
Acknowledgments The results presented in this paper were obtained within the Collaborative Research Centre 1153 ‘‘Process chain to produce hybrid high performance components by Tailored Forming’’ in the subproject B3 (project number: 252662854).
Online since: June 2021
Authors: Lei Qin, Hong Wei Ren, Geng Le Liu, Peng Zhao
Table 1 Composition of domestic grouting material number binding material mineral admixtures additives aggregate PC SAC else slag powder coal ash else water reducer swe-lling agent de-foamer else silica sand standard sand else 1 √ √ × × × QP LCC √ √ √ ESA √ × × 2 × √ × × × CBP CCP HABP BCP √ √ √ CC × × FS 3 √ √ × × √ PA B √ √ × T S √ × × 4 √ √ G × × OP √ × × D CE × × MS 5 √ √ PG × × OP √ √ √ E BA √ × CB NS 6 √ √ G × √ OP √ × √ × × √ × 7 √ √ × √ × × √ √ √ × √ × × 8 √ √ MPC √ √ CC FAM × √ √ ESA × × × 9 √ √ × √ × × √ √ √ SR × √ × 10 √ √ × × × × √ √ √ ESA WA √ √ × 11 √ √ DG × × × √ √ √ × √ √ × 12 √ √ × × × × √ √ √ SR √ × MS1 RS 13 √ √ × × × CC TP × √ √ CC √ × × 14 √ √ × √ √ × √ √ × ESA SR × × RS 15 √ √ G √ √ × √ × √ ESA SR × × RS 16 √ × G √ √ × √ × × SR ESA √ √ × 17 √ √ × × × × √ √ √ SR T CE √ × × 18 √ √ × √ √ FAM HCC √ √ √ ESA S SR √ √ × 19 √ √ G × × PSP √ √ √ ESA SR E √ √ × 20 √ √ × √ √ FAM HCC √ √ √ ESA SR WA √ × × 21 √ × × × √ TB CF SS √ √ √ AA ESA SR √ × × 22 √ √ HAC ×
The surface of the mountain sand is rough, the grains are angular, the sand content is high, the content of organic impurities is also more, and the quality is poor.
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