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Effect of Fly Ash and Early Strength Agent on Durability of Concrete Exposed to the Cyclic Sulfate Environment袁晓露,李北星Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology摘 要:The effect of fly ash and early strength agent on resistance of concrete to the cyclic sulfate environment......
Modeling Boundary and Edge Effect of Chloride Diffusion for Durability Design of Concrete Structures Exposed in Marine EnvironmentZHOU Xingang1,2,LI Kefei1,CHEN Zhaoyuan11. Department of Civil Engineering,Tsinghua University2. School of Civil Engineering,Yantai University摘 要:According to the Fick’s second law of diffusion, six analytical solutions......
) (BCC结构)固溶体转变为顺磁性的(Fe, Cr)2O3(六角晶系), 饱和磁化强度显著下降; 且随着变形量的增大, 较细Fe-Cr纤维的热稳定性较差. 关键词: Fe-Cr纤维; 变形量; 长期稳定性; 热稳定性; 磁性 中图分类号: TG113.22+5 文献标识码: A Long-term and thermal stability of magnetic Fe-Cr fibers... Cu-Fe-Cr in situ composite wires.The effects of deformation strain, long-term preservation condition and heat treatment on structure and magnetic properties of Fe-Cr fibers samples were......
is long-term production scheduling (LTPS) of the open-pit mines. Deterministic and uncertainty-based approaches are identified as the main strategies, which have been widely used to cope with this problem...: open-pit mine; long-term production scheduling; grade uncertainty; augmented Lagrangian relaxation; particle swarm optimization algorithm; bat algorithm Cite this article as: Kamyar TOLOUEI, Ehsan......
in specimens. Key words: durability of concrete structure; urban underground structure; sulfate ion invading; chloride ion invading; diffusion rule 文献[1]表明:耐久性破坏导致混凝土结构的损失巨大,发达国家对此十分关注[2-3],较早开展耐久性研究.在耐久性寿...): 57-63. [2] Collepardi M. Damage of concrete by sulfate invading and alkali-silica reaction: Advances in concrete structural durability[C]//Proceedings of the International Conference on Durability......
)06-1756-08 Long-term deformation of pre-stressed concrete beams with ballastless track and its influencing factors YE Mei-xin, CAO Jian-an, HOU Wen-qi, XIAO Jia (School of Civil Engineering... term observation and examination, development laws of the long term deformation of pre-stressed simple supported beams, including its influencing factors and control measures were studied......
up of middle and long-term faults, and there are eight condensed belts in the plane by the control of basement faults. When hydrocarbons in source rocks are generated and then expelled, the NNW-trending faults were reactivated in eastern fault condensed belts, while only boundary faults were reactivated in the western. By the control of basement and long-term growth faults, there are two spatial......
两种铸造镍基高温合金在长期时效期间的微观组织和力学性能演变秦学智1,郭建亭1,袁超1,侯介山1,周兰章1,叶恒强1(1.辽宁省沈阳市科学院金属研究所)摘 要:长期时效期间K452和K446合金中的γ′相形貌都保持球形,尺寸不断粗化,但K446中γ′相的粗化速率总体上比K452快.初生MC的热稳定性不仅与MC本身的化学成分密切相关,而且与合金成分有关;合金中γ基体的热稳定性(即晶内二次碳化物或TCP相的析出)与初生MC的热稳定性有关;晶界粗化通过γ′沉淀及镶嵌于其中的碳化物(M23C6或M6C)的析出和长大来实现......
Effect of long-term service on the precipitates in P92 steelYan-ping Zeng1,Jin-dou Jia1,Wen-he Cai2,Shu-qing Dong2,Zhi-chun Wang21. School of Materials Science and Engineering,University of Science and Technology Beijing2. North China Electric Power Research Institute Co.,Ltd.摘 要:The precipitates in P92 steel after long-term service in an ultra......
was introduced. In this model, the total creep strain before accelerated creep stage was defined as the characteristic length of creep, and the ratio of stress level and long-term strength of rock specimens... by this improved creep model. Key words: rheological model; accelerated creep; creep body model; viscoelasto-plastic model; long-term strength; characteristic length 岩石的流变力学特性作为岩石重要的力学特性之一,与岩体结构的长期稳定性紧密相关;许多工程实践和......