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Online since: August 2016
Authors: Martina Drdlová, Radek Řídký, René Čechmánek
SIFCON is prepared by infiltrating pre-placed fibres with fine grain aggregate mortar.
Fine SiO2 sand with grain size of 0-1 mm, cement CEM 52.5R and water were the main components of the slurry mixture.
The total absorbed energy is obtained using the following formula: E = m.ag.h.x Where: E…Total absorbed energy [J] m…Weight of the impactor [g] ag…Gravity acceleration [m.s-2] h…Height of drop [m] x…Number of the drops [-] DE 50/1 RB 80/50 BN DE 30/08 FRC - reference DE 30/06 N DE 50/08 Figure 1 Selected slabs after drop test – different failure modes A comparison of total energy-absorption capacities of different slab specimens at ultimate impact strength stages is presented in Figure 3.
Fine SiO2 sand with grain size of 0-1 mm, cement CEM 52.5R and water were the main components of the slurry mixture.
The total absorbed energy is obtained using the following formula: E = m.ag.h.x Where: E…Total absorbed energy [J] m…Weight of the impactor [g] ag…Gravity acceleration [m.s-2] h…Height of drop [m] x…Number of the drops [-] DE 50/1 RB 80/50 BN DE 30/08 FRC - reference DE 30/06 N DE 50/08 Figure 1 Selected slabs after drop test – different failure modes A comparison of total energy-absorption capacities of different slab specimens at ultimate impact strength stages is presented in Figure 3.
Online since: December 2013
Authors: Xiao Jiao Hou, Luan Luan, Shao Yan Jiang, Xiang Xin Xue
Introduction
Oil shale is fine-grained sedimentary rock including native organic matter, not dissolving in petroleum solvents and can extracting a lot of oil shale with pyrolysis[[] Liu Baiqian.
Take 40 g Fushun oil shale from sterile flasks, add 400 mL of sterile saline (m·v-1 = 0.85%), 30 ℃ 150 r· min-1 shock 30 min, the rock grains evenly dispersed in a suspension in sterile saline, to get an oil shale 10-1 bacteria. 2.
From Fig.5, which ZYK7 growing more lush, while the other two strains are growing poorer and smaller number of amplified by PCR ZYK7 rDNA ITS region, its molecular identification, the strains in Genbank Fusarium oxysporum (JF807394) 100% homology.
Take 40 g Fushun oil shale from sterile flasks, add 400 mL of sterile saline (m·v-1 = 0.85%), 30 ℃ 150 r· min-1 shock 30 min, the rock grains evenly dispersed in a suspension in sterile saline, to get an oil shale 10-1 bacteria. 2.
From Fig.5, which ZYK7 growing more lush, while the other two strains are growing poorer and smaller number of amplified by PCR ZYK7 rDNA ITS region, its molecular identification, the strains in Genbank Fusarium oxysporum (JF807394) 100% homology.
Online since: April 2004
Authors: Todd S. Mintz, Thomas M. Devine
First, the results suggest that
IGSCC of sensitized 304 stainless steel occurs because of the formation of films of α-M2O3 along
sensitized grain boundaries.
Second, the results suggest that HWC is effective because HWC lowers the potential at crack tips to values less than -400 mV so that films of M3O4, rather than α-M2O3, form along sensitized grain boundaries.
The spectra at potentials above -750 mV display a number of potential-dependent changes.
Second, the results suggest that HWC is effective because HWC lowers the potential at crack tips to values less than -400 mV so that films of M3O4, rather than α-M2O3, form along sensitized grain boundaries.
The spectra at potentials above -750 mV display a number of potential-dependent changes.
Online since: January 2026
Authors: Dmytro G. Savvakin, Pavlo E. Markovsky, Sergey Prikhodko
Additionally, the Ti64 alloy fabricated via BEPM exhibits finer α-grains and intragranular β-lamellae compared to the coarse-grained lamellar structure of the conventionally cast and wrought alloy, with these microstructural differences becoming more pronounced under high dynamic impact [10].
Due to test limitations (plate size and number of tests), a rigid comparison isn’t possible, but reasonable estimates can be made using SKE data of BEPM made laminates.
Due to test limitations (plate size and number of tests), a rigid comparison isn’t possible, but reasonable estimates can be made using SKE data of BEPM made laminates.
Online since: May 2014
Authors: Manuel Marya, Tatiana Reyes, Timothy Dunne, Chun Nong Wang
Established correlation for aluminum alloys have shown that the alloys must at least exhibit a 110 Vickers hardness number (HVN)
It may be seen the disclosed alloy exhibits fairly large grains, all continuously decorated with gallium.
Due to its continuous grain boundary network of gallium, the alloy depicted in Figure 4 inherently possesses limited tensile properties, and turned out to be of limited usefulness.
It may be seen the disclosed alloy exhibits fairly large grains, all continuously decorated with gallium.
Due to its continuous grain boundary network of gallium, the alloy depicted in Figure 4 inherently possesses limited tensile properties, and turned out to be of limited usefulness.
Online since: March 2015
Authors: Hai Chao Wang, Fang Ning Sun, Zhi Gang Yang, Chen Chen, Chun He Zhao, Wei Wei Li
material dropping interval
TJ1
690
625
640
770
210
TJ2
710
710
710
675
230
TJ3
695
760
745
650
250
TJ1v
230
208
213
257
200
TJ2v
237
237
237
225
280
TJ3v
232
253
248
217
230
RJ
7
45
35
40
215
TJ1:Represent various factors 1 horizontal sum;TJ1v:Represent various factors 1 horizontal mean value;RJ:Represent Xmax-Xmin
190
270
LJ reducing agent for cement XB results are shown in Table 9:
Table 9 LJ for XB initial flow test results:
Calculation analysis
Factor A
Factor B
Factor C
Factor D
The initial liquidity
The stir of bottom material
Temperature
A material continuously dropped
B material dropping interval
TJ1
530
540
545
560
160
TJ2
580
575
540
530
160
TJ3
585
580
610
605
210
TJ1v
177
180
182
187
190
TJ2v
193
192
180
177
210
TJ3v
195
193
203
202
180
RJ
18
13
21
25
190
TJ1:Represent various factors 1 horizontal sum;TJ1v:Represent various factors 1 horizontal mean value;RJ:Represent Xmax-Xmin
190
270
In Table 4-Table 9,bold numbers
System differences may performance in cement particle size distribution, grain type , which is the physical aspect,and the impact of accessory types and chemical composition in the production process of ordinary Portland cement,which can by adding to mixed material to adjust the gradation and reduce the impact of cement materials composition.
(2) The results showed that there are system differences exist in the adaptable of different cement Polycarboxylate superplasticizers[7],these differences caused by the physical and chemical properties, graded cement particles, grain types and the types of accessories all have an impact
System differences may performance in cement particle size distribution, grain type , which is the physical aspect,and the impact of accessory types and chemical composition in the production process of ordinary Portland cement,which can by adding to mixed material to adjust the gradation and reduce the impact of cement materials composition.
(2) The results showed that there are system differences exist in the adaptable of different cement Polycarboxylate superplasticizers[7],these differences caused by the physical and chemical properties, graded cement particles, grain types and the types of accessories all have an impact
Improving the Efficiency of Machine Grinding of Double Curvature Surfaces with a Profiled Flap Wheel
Online since: February 2022
Authors: Valentina B. Rakitskaya, Tri Vinh Le, Vladimir P. Koltsov, Evgenia V. Tardybaeva
As a result, the impact of flap abrasive grains on the surface of the contact spot will differ significantly, which leads to uneven metal removal along the processing width.
The best quality of grinding will be achieved when this gap is completely eliminated, since in this case the impact of the flap wheels on the contact surface will be the same both in terms of the impact force and number of abrasive grains.
The best quality of grinding will be achieved when this gap is completely eliminated, since in this case the impact of the flap wheels on the contact surface will be the same both in terms of the impact force and number of abrasive grains.
Online since: October 2015
Authors: Nabil Bella, Ilham Aguida Bella, Aissa Asroun
Specific gravity
1.06 ± 0.01
pH
6 ± 1
Chloride content
< 0.1 %
Alkali content
≤ 1 %
Dry extract
30,2 ± 1,3 %
Sand
Bechar City (southwest of Algeria) benefit of a large number of building materials, the main choice is the nearly site, the used sand is the principal existing sand in this region.
It is remarkable to notice, the use of rolled SCM seems permit the flow of aggregates grains between themselves by slip between rolled SCM.
Even if crushed SCM is used the grains aggregates slip between themselves not by their morphology but by dispersion of fine limestone by superplasticizer dispersion action (rheological despersion).
It is remarkable to notice, the use of rolled SCM seems permit the flow of aggregates grains between themselves by slip between rolled SCM.
Even if crushed SCM is used the grains aggregates slip between themselves not by their morphology but by dispersion of fine limestone by superplasticizer dispersion action (rheological despersion).
Online since: November 2015
Authors: P. Ponsurya, Shahid Hussain, B.H. Abbas Shahul Hameed, R. Perumalsamy, R. Thirumamagal, M. Jayachandran, A. Ayeshamariam
The grain size, D, in the thin films was estimated from the half-widths b, at the maximum of the or the XRD peak with the highest intensity by using the Classical Scherrer formula, assuming that microstrain were neglected.
The powdered particles of diamond were obtained when as-prepared graphite powder was annealed at 1350 ºC, which was in well match with JCPDS file number (JCPDS 89-3439) cubic structure of lattice constant a = 3.567 A0, the predominant peak is 111 plane with minimum intensity of the spectrum.
The gas sensitivity is relative to grain size, surface state, oxygen adsorption and lattice defects.
The powdered particles of diamond were obtained when as-prepared graphite powder was annealed at 1350 ºC, which was in well match with JCPDS file number (JCPDS 89-3439) cubic structure of lattice constant a = 3.567 A0, the predominant peak is 111 plane with minimum intensity of the spectrum.
The gas sensitivity is relative to grain size, surface state, oxygen adsorption and lattice defects.