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at room temperature. High-strength concrete were made from typeⅠPortland cement, natural sea sand, and crushed granitic gravel. Owing to the low W/C ratio adopted, the superplasticizer was used to increase.... In the temperature range from 400 ℃ to 700 ℃, the strength drops sharply, reaching to a low level of 60% and 45% of initial strength, at 600 ℃ and 700 ℃, respectively. Fig.6 Variation of compressive......
significantly temperature drop computation, and is dependent on pipeline inclination. For declined pipes, the liquid holdup is relatively low and temperature drop of gas-liquid mixed fluid increases, while...J. Cent. South Univ. (2012) 19: 1932-1937 DOI: 10.1007/s11771-012-1228-6 Calculation on inner wall temperature in oil-gas pipe flow DUAN Ji-miao(段纪淼)1, WANG Wei(王玮)1, ZHANG Yu(张宇)2, LIU Hui......
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exhibit either elastic or viscous behavior, or combination of these, depending on temperature and time over which the asphalt is observed. At sufficiently low temperatures and/or high frequencies... temperature susceptibility such as high- temperature rutting, medium temperature fatigue and low temperature cracking damage[6-7]. For this reason, the temperature susceptibility is the critical......
was started in β-phase region and finished in high (α+β)-phase region. Annealing after forging was performed in low (α+β)-phase region for 30 min. Isothermal high temperature compression tests were conducted... of stress-strain curves indicates the different hot deformation mechanisms at 850 ℃ and 1 000 ℃. From Fig.1(a) it can be seen the typical dynamic recrystallization curve at low temperature......
. Insulation property of CF4 and CF4/N2 in refrigeration temperature range is studied through self-designed low-temperature test system. The result shows when the density of hybrid gas is invariable...% CF3I/CO2 mixture is more suitable for being used in low medium voltage gas insulated equipment. But the liquefaction temperature of CF3I or c-C4F8 is very high. c-C4F8 liquefaction temperature is -8 °C......
J. Cent. South Univ. Technol. (2007)04-0496-04 DOI: 10.1007/s11771-007-0096-y Numerical simulation of temperature and velocity fields in plasma spray FAN Qun-bo(范群波), WANG Lu(王 鲁... on the turbulence jet model, with respect to Ar-He mixture plasma gas injecting to ambient atmosphere, the temperature filed and velocity field under typical working conditions were investigated......
the densification of materials. On the other hand, due to components of low fusing point (such as Sn) in the matrix, some liquid phase will appear at higher temperature, which can fill some pores and then strengthen... Effects of sintering pressure and temperature on microstructure and tribological characteristic of Cu-based aircraft brake material XIONG Xiang(熊 翔), SHENG Hong-chao(盛洪超), CHEN Jie(陈 洁......
Trans. Nonferrous Met. Soc. China 22(2012) 2351-2356 Mechanical properties of Mg-6Gd-1Y-0.5Zr alloy processed by low temperature thermo-mechanical treatment LI De-jiang1, ZENG Xiao-qin1, XIE... treated Mg-6Gd-1Y-0.4Zr alloy was processed by low temperature thermo-mechanical treatments (LT-TMT), including cold tension with various strains followed by aging at 200 ℃ to peak hardness......
High temperature performance of arc-sprayed aluminum bronze coatings for steel ZHANG Zhong-li(张忠礼)1, LI De-yuan(李德元)1, WANG Shui-yong(王水勇)2 1. School of Materials Science and Engineering... April 2006 Abstract: The high-temperature oxidation behavior of arc-sprayed aluminum bronze coatings on steel substrate was studied during isothermal exposures in air at 900 ℃. The surface......