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不同面层体积分数下梯度结构混凝土的表面氯离子浓度 被引量:1

Surface Chloride Concentration of Gradient Structure Concrete with Different Volume Fraction of Surface-Layer
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摘要 通过室内氯离子侵蚀加速试验及氯离子分布测试,结合Fick第二定理拟合出梯度结构混凝土(GSC)的表面氯离子浓度,以研究面层体积分数、加速试验龄期对GSC表面氯离子浓度的影响.结果表明:GSC的表面氯离子浓度随面层体积分数的增加而下降,并逐渐趋于平缓;GSC表面氯离子浓度随暴露时间的延长而增加,最后趋于稳定;与面层体积分数φs=0的GSC试件相比,φs>0的试件具有更大的表征表面氯离子浓度累积速率的拟合系数r,但φs>0后,各GSC试件的r值相差不大.在现有模型的基础上,分别提出了GSC表面氯离子浓度与面层体积分数、加速试验龄期间的关系. Combined with the Fick's second law, the surface chloride concentration of gradtent structure concrete (GSC) were calculated for studying the effect of surface-layer volume fractions and accelerating period, by conduc- ting the chloride migration rapid test and determining the distribution of chloride. The results show that surface chloride concentration of the GSC is reduced with the increase of volume fractions of surface-layer, and finally rea- ches a stead state~ and the surface chloride concentration in GSC gradually grows along with the accelerating period increases, and also reaches a stead state finally. Compared with the specimens of 0% volume fractions of surface- layer, that with a higher volume fraction has a faster accumulation rate of chloride on the surface. But when the volume fraction of surface-layer exceeds 0%, the accumulation rate of the all specimens is almost equal. At last, the relationship among surface chloride concentration, surface layer volume fraction and accelerated period are put forward respectively hased on the existing model.
出处 《建筑材料学报》 EI CAS CSCD 北大核心 2013年第6期1067-1071,共5页 Journal of Building Materials
基金 浙江省公益技术研究分析测试项目(2012C37049) 宁波市社会发展重大重点项目(2013C51004) 宁波市交通运输委员会科技项目(201307)
关键词 梯度结构 设计 加速试验 表面氯离子浓度 gradient structure design accelerated test surface chloride concentration
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  • 1袁勇,刘涛,柳献.运营越江隧道服役现状调查与检测评估[J].东南大学学报(自然科学版),2006,36(S2):83-89. 被引量:43
  • 2BASHEER P A M,NOLAN (E). Near-surface moisture gradients and in situ permeation tests[J].{H}Construction and Building Materials,2001,(2-3):105-114.
  • 3KOYAMA Y. Present status and technology of shield tunneling method in Japan[J].{H}Tunnelling and Underground Space Technology,2003,(02):145-159.
  • 4YANG Jiu-jun,HAI Ran,DONG Yan-ling. Effect of the component and fiber gradient distributions on the strength of cement-based composite materials[J].Journal of Wuhan University of Technology:Materials Science,2003,(02):61-64.
  • 5WEN Xiao-dong,MA Bao-guo,GAN Wei-zhong. Design and research on gradient structure concrete based on volumetric stabilization[J].{H}ACI MATERIALS JOURNAL,2010,(06):611-616.
  • 6李庆华,徐世烺.超高韧性复合材料控裂功能梯度复合梁弯曲性能试验研究[J].中国科学(E辑),2009,39(8):1391-1406. 被引量:19
  • 7DIAS C M R,Jr SAVASTANO H,JOHN V M. Exploring the potential of functionally graded materials concept for the development of fiber cement[J].{H}Construction and Building Materials,2010,(02):140-146.
  • 8QUEK S T,LIN V W J,MAALEJ M. Development of functionally-graded cementitious panel against high-velocity small projectile impact[J].{H}International Journal of Impact Engineering,2010,(08):928-941.
  • 9温小栋,干伟忠,谷伟,陈旭波.体积分数对梯度结构混凝土扩散系数影响研究[J].建筑结构学报,2013,34(6):153-158. 被引量:2
  • 10赵羽习,王传坤,金伟良,许晨.混凝土表面氯离子浓度时变规律试验研究[J].土木建筑与环境工程,2010,32(3):8-13. 被引量:50

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