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Online since: January 2021
Authors: Evgeniy A. Shoshin, Valeria V. Strokova, Zheng Mao Ye
Composition and properties of heavy concrete B 25 Control composition Main properties Number of components [kg] Property Value cement Crushed stone sand water density [kg/m3] 2325 405 1130 620 203 Cone sediment (CS) [cm] 16 Results and Discussion The molecular structure of disaccharide determines the level of absorption of the latter by the hydrosilicate matrix [24].
Thus, in mixing the Cement-sSCD SC, sucrose adsorption is observed on free silicate surfaces of cement grains and hydrated neoplasms, which violates the adsorption equilibrium and releases new portions of sucrose.
Goreva, Nanosilica based on hydrothermal solutions: characteristics, results of increasing the strength of fine-grained concrete, Modern high technology, 8 (2018) 54–58
Online since: January 2024
Authors: Eny Fatmawati, Sunaryono Sunaryono, Nadiya Miftachul Chusna, Siti Nur Halizah, Futri Yuliana
The average grain size of this composite is 27.33 nm, comprising clusters of Fe3O4, ZnO, and TiO2 nanoparticles.
The composition of the TiO2 nanoparticles in Fig. 7 is consistent with the research reported by Singh et al., which found that TiO2 nanoparticles had little aggregation but a grain size below 100 nm [28].
Acknowledgment Our research received full support from the 2020 Malang State University PNBP funding in the thesis publication scheme with contract number 4.3.514/UN32.14.1/LT/2020 on behalf of SN.
Online since: September 2011
Authors: Hong Jun Liu, Hu Wang, Min Sheng Zhang, Xiu Hai Wang
Grain size distribution was shown in Fig. 2.
Fig. 2 Grain size distribution curve Fig. 3 Experimental phenomena Results Three series of tests were good in consistency, series 2 was taken for example with a the seabed depth 43 cm and a water depth 42 cm.
After a certain numbers of wave cycles, the pore volume decreased and the re-arranging of particles caused by densification induced that no more volume decrease could happen, the compression and dilation in one wave cycle canceled out.
Online since: October 2013
Authors: Jing Ma, Xiao Long Lei, Rong Chao Ma
Introduction Grain loss rate has passed 8% per annum due to low level of mechanization, poor technology and out-of-date equipment in China.
Rotary dryers are put into use extensively in a range of industries for control of temperature and moisture content of free flowing and are more applied in particulate solids such as grains, sugar and mineral ores.
(5) (6) The main time of heating and drying solids is active cycle time; but the number of active time is much smaller than passed time.
Online since: June 2013
Authors: Qiu Ju Zhang
Biomass method is used to speculate the carbon storage amount of regional forest system basing on the sum of various biomass numbers in the forest and local stochastic sampling survey data.
Among which, the dry matter of main crops are computed according to average yield, grain to straw ratio, the measured grain of corresponding crop and straw carbon content; the dry matter of vegetables are calculated according to the average yield per mu and water content of 95%; the fruit part of fruits are calculated according to the average yield per mu and water content of 85%[8].
Online since: April 2008
Authors: Jan G.M. van Mier, Dominik Meyer, Hau Kit Man
For coarser-grained concretes, in the extreme case dam concrete with aggregates as large as 100-150 mm, special specimen sizes are required.
Note that in Figure (b) the central crack would develop along the interface along one of the two neighbouring grains.
After a number of phenomenological tests [2], more detailed experiments are currently conducted using a scaled-down test device fitted for use in a table-top X-Ray tomograph (SCANCO Medical).
Online since: November 2014
Authors: P. Stefanizzi, Stefania Liuzzi
A universal interpretation of the term 'clay' leads up to assert that it is a natural, earthy, fine-grained material that develops plasticity when mixed with a limited amount of water.
Reeves et al. [5] have tried to summarize the numerous definitions by the following statement: The term 'clay' refers to a naturally occurring material composed primarily of fine-grained minerals, which is generally plastic at appropriate water contents and will harden when dried or fired.
The GDR included earth construction in a number of DIN standards but these were mostly withdrawn in 1971.
Online since: August 2008
Authors: Seksan Chaijit, Yoshikazu Yajima, Kazuya Kikuchi, Yasushi Fukuzawa, Shigeru Nagasawa, Akira Hine
The position of the cutting blade was vertical to the specimen, while the direction of the cutting line with respect to Machine (grain) direction of the paperboard was chosen as .
Where, the experiment was carried out under the following conditions; Feed velocity: 1mm/min, room temperature: 291K, room humidity: 44%, number of samples: fives pieces.
It seems that the TD compression of the tip contributes to restrict the lateral (In-plane) elongation to the surface layer due to the grain inside friction.
Online since: October 2015
Authors: Marek Szajt, Ismena Dzida
Meanwhile, the number of companies producing products classified as high-tech in the European Union during this period decreased by approximately 2.5%.
Statistical ratio of enrolment is impressive, it shows significant growth in the number of people deciding to study at universities.
Growth in the number of young scientists in Poland in recent years has resulted in an increase in the number of people who plan researcher career, which causes growing efficiency of research and science facilities.
Among the entrepreneurs who undertake the cooperation in the scope of R&D the greatest popularity is won by the projects with low risk [9], and thereby low rate of return which is not sufficient to grain long-term economic benefits [10].
The largest number of technopolises is in the United States.
Online since: September 2010
Authors: Islam Shyha, Sam Bradley, Stuart Dawson, Cornelius J. Pretorius, Sein Leung Soo, David K. Aspinwall
The nanocomposite structured C7 product by Unimerco consists of nano-crystalline AlTiN grains embedded in an amorphous matrix of silicon nitride (Si3N4), which provides a high oxidation limit (up to 1100o C) together with a hardness of 45 GPa (4600 HV).
The former suggests that maximum number of holes would be obtained by operating at the lowest cutting speed and feed rate under wet conditions, independent of drill coating.
Fig. 5: (a) Main effects plot and (b) ANOVA results for tool life in terms number of drilled holes.
Fig. 6: (a) Typical thrust force / torque signature and (b) evolution of thrust force / torque versus number of drilled holes in Test 1.
Conclusions • Tool life in terms of number of drilled holes was primarily dependent on cutting speed and cutting environment.
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