首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
用环境扫描电镜原位定量追踪K-PSDS型地聚合物混凝土界面区的水化过程
作者:张云升 孙伟 林玮 郑克仁 沙建芳 刘斯凤 
单位:东南大学材料科学与工程系 东南大学材料科学与工程系 东南大学材料科学与工程系 东南大学材料科学与工程系 东南大学材料科学与工程系 东南大学材料科学与工程系 南京 210096  南京 210096  南京 210096  南京 210096  南京 210096  南京 210096 
关键词:地聚合物水泥  界面区  水化过程  原位定量追踪  偏高岭土 
分类号:TU528.01
出版年,卷(期):页码:2003,31(8):806-810
DOI:
摘要:
应用环境扫描电镜(ESEM)原位定量追踪K-PSDS型(KOH激发合成的PSDS型)地聚合物水泥混凝土在相对湿度80%条件下界面区水化产物生成、发展和演化的过程。实验结果表明:界面区和基体区的ESEM形貌在水化早期差别较大,界面区存在许多大的空洞(50μm),而基体区颗粒分布均匀、密实;随龄期的增长,凝胶状产物在界面区空洞周缘淀积,并向外伸展,空洞逐渐被填满、湮没;到后期二者形貌基本没有太大区别,但通过能量散射分析(EDXA)发现界面区n(K)/n(Al)和n(Si)/n(Al)高于基体区,表明K和Si在界面区富集,从而造成胶凝产物化学组成的差异。另外,界面区在任何龄期均未出现尺寸规则的结晶产物,而仅生成了海绵状胶凝体。
married cheaters cheat on my wife click
open open My husband cheated on me
abortion pill abortion pill abortion pill
A technique of environment scanning electron microscope (ESEM) was used to quantitatively observe in situ and record the hydration process of interfacial transition zone(ITZ) and K - PSDS geopolymer matrix under R. H. 80% . The ESEM micrographs and corresponding EDXA show that microstructure of ITZ is quite different from that of matrix at the early stage. There exist many large voids (50 fj.m) in ITZ, while it is just the reverse for the matrix. With the proceeding of hydration gel products are gradually precipitated on the edges of these voids and then extended outward, and as a result these voids are fully filled. At the later stage, no obvious differences between ITZ and matrix can be seen from the micrographs. But studies on these two regions by EDXA display that the contents of n(K)/n(Al) and n(Si)/n(Al) in ITZ are higher than that in matrix. This indicates that the accumulation of K and Si in ITZ results in the chemical composition difference between ITZ and matrix. In addition, well-developed crystals are not found in ITZ and matrix at any ages, while sponge-like gel is always observed.
how do i know if my wife has cheated dating for married men read
open open My husband cheated on me
amoxicillin amoxicillin amoxicillin
cialis coupon cialis coupon cialis coupon
基金项目:
国家自然科学基金(50278018);;国家自然科学重点基金(59938170)
作者简介:
how to catch a cheater redirect go
bystolic copay card click bystolic coupon voucher
参考文献:
[1] DAVIDOVITS J. Geopolymers and geopolymeric new materials[J]. J Therm Anal, 1989, 35: 429-441. [2] LYON R E, FODEN A, BALAGURU P N, et al. Fire-resistant aluminosilicate composites [J]. J Fire Mater, 1997,21: 67-73. [3] DAVIDOVITS J. High alkali cements for 21st century concretes [A]. In: MEHTA P K ed. Concrete Technology,Past, Present, and Future[C]. Detroit: American Concrete Institute, SP-144, 1994. 383-397. [4] DAVIDOVITS J. Geopolymer chemistry and properties[A].In: DAVIDOVITS J, ORILINSKI J eds. Geopolymer 88,Proceedings of the First European Conference on Soft Mineralogy [C]. France: Universite de Technologe, Compiegne,1988. 25-48. [5] MOURET M, BASCOUL A, ESCADEILLAS G. Microstructural features of concrete in relation to initial temperature--SEM and ESEM characterization [J]. Cem Concr Res, 1999, 29: 369-375. [6] KNUT O K, HAMLIN M J. Observations of microcracking in cement paste upon drying and rewetting by environmental scanning electron microscopy[J]. Adv Cem Based Mater,1996, 3: 14-19. [7] SU Z, SUJATA K, BIJEN J M, et al. The evolution of the microstructure in styrene acrylate polymer-modified cement pastes at the early stage of cement hydration [J]. Adv Cem Based Mater, 1996, 3: 87-93. [8] DAVIDE Z, SURENDRA P S. Early age microstructure of the paste-aggregate interface and its evolution [J]. J Mater Res, 1998, 13(7) : 1888-1898. [9] 邵曼君.环境扫描电镜原位研究纯Fe表面氧化过程[J].金属学报,2000,36(3) :230-240. SHAO Manjun. Acta Metall Sinica (in Chinese), 2000, 36(3) : 230-240.
how do i know if my wife has cheated infidelity in marriage read
My wife cheated on me why wives cheat on husbands reasons married men cheat
printable coupons for cialis outbackuav.com coupon for free cialis
doxycycline doxycycline doxycycline
sumatriptan side effects sumatriptan side effects sumatriptan side effects
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com