全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

干湿交替下表层混凝土中氯离子传输:原理、试验和模拟

Full-Text   Cite this paper   Add to My Lib

Abstract:

在干湿交替下表层混凝土内水分的不同传输机理的基础上,建立了干湿交替下表层混凝土内氯离子传输模型。利用上游加权"预估–校正"有限差分格式求解了对流占优的氯离子对流–扩散问题。进行了混凝土的氯离子吸附试验,并采用分段函数来表达氯离子吸附曲线。进行了为期120d的干湿交替下混凝土内氯离子传输试验研究。利用建立的模型和试验测得的基本材料参数进行了数值计算,计算结果同干湿交替试验中实测的氯离子含量分布吻合较好,证明了干湿交替下表层混凝土内氯离子传输模型的正确性和考虑干湿交替过程水分本身传输的重要性。研究表明干湿交替下混凝土内氯离子入侵比永久浸没于氯盐溶液中的混凝土要严重得多。同时,由于混凝土对氯离子的强吸附性,干湿交替下混凝土中氯离子传输的影响深度小于水分传输。

References

[1]  NGUYEN T.Modélisations Physico-chimiques de la Pénétration des Ions Chlorures dans les Matériaux Cimentaires[D].Paris:Laboratoire Central des Ponts et Chaussées,2007. [2]ABABNEH A,BENBOUDJEMA F,XI Y.Chloride penetration in non-saturated concrete[J].J Mater Civ Eng ASCE,2003,15(2):183–191. [3]SAETTA A,SCOTTA R,VITALIANI R.Analysis of chloride diffusion into partially saturated concrete[J].ACI Mater J,1993,90(5):441–451. [4]李春秋.干湿交替下表层混凝土中水分与离子传输过程研究[D].北京:清华大学,2009.LI Chunqiu.Study on water and ionic transport processes in cover concrete under drying-wetting cycles(in Chinese,dissertation).Beijing:Tsinghua University,2009. [5]雷志栋,杨诗秀,谢森传.土壤水动力学[M].北京:清华大学出版社,1988:59–60.LEI Zhidong,YANG Shixiu,XIE Senchuan.Soil Water Dynamics(in Chinese).Beijing:Tsinghua University Press,1988:59–60. [6]CLIMENT M,de VERA G,LOPEZ J,et al.A test method for measuring chloride diffusion coefficients through nonsaturated concrete Part I.The instantaneous plane source diffusion case[J].Cem Concr Res,2002,32(7):1113–1123. [7]de VERA G,CLIMENT M,VIQUEIRA E,et al.A test method for measuring chloride diffusion coefficients through partially saturated concrete.Part II:The instantaneous plane source diffusion case with chloride binding consideration[J].Cem Concr Res,2007,37(5):714–724. [8]-ERNY R,PAVLíK Z,ROVNANíKOVáP.Experimental analysis of coupled water and chloride transport in cement mortar[J].Cem Concr Compos,2004,26(6):705–715. [9]朱文涛.物理化学[M].北京:清华大学出版社,1995:152–164.ZHU Wentao.Physical Chemistry(in Chinese).Beijing:Tsinghua University Press,1995:152–164. [10]LIN Hsinyi,LEE Liangsun.Estimations of activity coefficients of constituent ions in aqueous electrolyte solutions with the two-ionic-parameter approach[J].Fluid Phase Equilibria,2005,237(1/2):1–8. [11]LIN Chenglong,LEE Liangsun.A two-ionic-parameter approach for ion activity coefficients of aqueous electrolyte solutions[J].Fluid Phase Equilib,2003,205(1):69–88. [12]LIDE D.CRC Handbook of Chemistry and Physics[M].84th Ed.Boca Raton:CRC Press,2003:6–8 [13]颜肖慈,罗明道.界面化学[M].北京:化学工业出版社,2005:21–24.YAN Xiaoci,LUO Mingdao.Interfacial Chemistry(in Chinese).Beijing:Chemical Industry Press,2005:21–24. [14]陆金甫,顾丽珍,陈景良.偏微分方程差分方法[M].北京:高等教育出版社,1988:233–249.LU Jinfu,GU Lizhen,CHEN Jingliang.The Difference Method for Partial Differential Equation(in Chinese).Beijing:Higher Education Press,1988:233–249. [15]王洪涛.多孔介质污染物迁移动力学[M].北京:高等教育出版社,2008:387–392.WANG Hongtao.Dynamics of Fluid Flow and Contaminant Transport in Porous Media(in Chinese).Beijing:High Education Press,2008:387–392. [16]WANG H,LACROIX M.Optimal weighting in the finite difference solution of the convection dispersion equation[J].J Hydrol,1997,200(1–4):228–242. [17]TANG Luping,NILLSON L.Chloride binding capacity and binding isotherm of OPC pastes and mortars[J].Cem Concr Res,1993,23(2):247–253. [18]American Society for Testing and Materials.Standard Test Method for Acid-soluble Chloride in Mortar and Concrete,ASTM C1152/C1152M–04[S].Philadelphia:ASTM,2004. [19]LI Chunqiu,LI Kefei,CHEN Zhaoyuan.Numerical analysis of moisture influential depth in concrete and its application in durability design[J].Tsinghua Sci Technol,2008,13(S1):7–12. [20]Fédération International du Béton.Model Code for Service Life Design,fib Bulletin34[S].Lausanne:fib,2006. [21]范宏,赵铁军,徐红波.码头混凝土中的氯离子侵入研究[J].水运工程,2006(4):49–53.FAN Hong,ZHAO Tiejun,XU Hongbo.Port&Waterway Eng(in Chinese),2006(4):49–53.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133