酸性环境下岩石及混凝土的耐久性分析
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摘要
以加速腐蚀试验对扩散规律的认识为基础,考虑化学反应造成酸液浓度降低对腐蚀的阻滞作用,建立了在大体积岩石及混凝土材料中考虑化学反应影响时溶质的扩散控制方程,开发了相应的二维有限元分析程序,结合某一水利工程受酸雨影响的使用寿命问题,提出了一种预测大体积岩石及混凝土中酸液浓度扩散范围随时间变化及强度劣化规律的思路与方法.
Based on the research of accelerated corroded test and understanding for diffusion regularity,the distribution function of the concentration of mass rock and concrete materials is obtained in consideration of chemical reaction effect. 2-D seepage and diffusion FEM calculation program is developed to predict the service life of rock slope of dam abutment in acid rain region.The deteriorative regularity of the uniaxial compressive strength of mass rock and concrete and the character of hydrion concentration variation at different stage are put forward.
Based on the research of accelerated corroded test and understanding for diffusion regularity,the distribution function of the concentration of mass rock and concrete materials is obtained in consideration of chemical reaction effect. 2-D seepage and diffusion FEM calculation program is developed to predict the service life of rock slope of dam abutment in acid rain region.The deteriorative regularity of the uniaxial compressive strength of mass rock and concrete and the character of hydrion concentration variation at different stage are put forward.
引文
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[2]牛荻涛.混凝土结构耐久性与寿命预测[M].北京:科学出版社,2003.NI U Di-tao,Durability and service life forecast of concrete structure[M].Beijing:Science Press,2003.
[3]Saetta A V,Roberto S,Remato V.Coupled environmental-mechanical damage model of RC Structures[J].Cem.Concr.Res,1999,125(8):930-940.
[4]LI Ning,ZHU Yun-ming,Bo Su.Achemical damage model of sandstone in acid solution[J].Int Rock Mech MinSci,2003,40:243-249.
[5]孙讷正.地下水污染-数学模型和数值方法[M].北京:地质出版社,1989.SUN Na-zheng.Mathematical model and numerical method of pollution for groundwater[M].Beijing:GeologyPress,1989.
[6]朱学愚,谢春红.地下水运移模型[M].北京:中国建筑工业出版社,1990.Guxueyu,Xiechunhong.Modeling of ransport in subsurface flow[M].Beijing:China Architecture and BuildingPress,2002.
[7]费里泽RA.地下水[M].北京:地震出版社,1987.Franze R A.Groundwater[M].Beijing:Earthquake Press,1987.
[8]Crank J.The Mathematics of Diffusion[M].2nd Edition.New York:Oxford University Press,1975.
[9]孔祥言.高等渗流力学[M].合肥:中国科学技术大学出版社,1999.KONG Xiang-yan.Higher seepage mechanics[M].Hefei:University of Science and Technology Press,1999.
[10]Hsieh P A.A newformula for the analytical solution of the radial dispersion problem[J].Water Resources Re-search,1986,22(11):1597-1605.
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