基于硫酸盐侵蚀与溶蚀耦合作用的混凝土硫酸根传输过程

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• 英文论文题名：Diffusion Process of Sulfate Ion Based on Coupled Erosion of Sulfate and Dissolution of Concrete
• 论文作者：宁逢伟 ; 丁建彤 ; 白银 ; 王子龙 ; 吴星奎
• 英文论文作者：NING Fengwei ; DING Jiantong ; BAI Yin ; WANG Zilong ; WU Xingkui ; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering ; Nanjing Hydraulic Research Institute ; Sinohydro Bureau 7 Corporation Limited
• 年：2016
• 作者机构：南京水利科学研究院水文水资源与水利工程科学国家重点实验室;中国水利水电第七工程局有限公司;
• 论文关键词：混凝土 ; 硫酸盐 ; 溶蚀 ; 耦合 ; 数值分析
• 英文论文关键词：concrete ; sulfate ; dissolution ; coupled ; numerical analysis
• 会议召开时间：2016-11-18
• 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
• 语种：中文
• 分类号：TU528
• 学会代码：CLDB
• 会议名称：第一届先进材料前沿学术会议
• 会议地点：中国陕西西安
• 主办单位：《材料导报》杂志社
• 学会名称：材料导报编辑部
• 页数：5
• 文件大小：914k
• 原文格式：O
• 会议级别：全国

摘要

为模拟混凝土在硫酸盐侵蚀与渗透溶蚀耦合作用下硫酸根离子的传输过程,基于表面接触溶蚀模型推导了渗透溶蚀混凝土孔隙率经时变化计算公式。并将其引入到现有硫酸根离子侵蚀模型中,建立了硫酸盐侵蚀与渗透溶蚀耦合作用的微分方程。提出了可定量表征混凝土溶蚀程度的溶蚀速率常数。并以某混凝土为例对不同溶蚀速率下的硫酸根离子浓度分布进行数值分析。
To simulate the process of sulfate ion diffusion according to coupled erosion of sulfate erosion and penetration dissolution,based on surface contact dissolution model,the formula of porosity of concrete varying through time was derived,which was introduced to present sulfate ion diffusion model.After that the differential equation of coupled erosion of sulfate erosion and penetration dissolution was established.Dissolution velocity constant was proposed to quantitatively reflect the process of penetration dissolution.A kind of concrete was taken for example by numerical analysis to contrast on sulfate concentrations distribution for different dissolution velocities.

引文

1 Yang H,Jiang L H,Zhang Y,et al.Summary of researches on chemical damage of concrete based on leaching process[J].Adv Sci Technol Water Resources,2011,31(1):83(in Chinese).杨虎,蒋林华,张研等.基于溶蚀过程的混凝土化学损伤研究综述[J].水利水电科技进展,2011,31(1):83.
    2 Wan X R.Numerical simulation of diffusion reaction of sulfate ion in concrete subjected to external sulfate attack[J].Ind Const,2010,40(s1):843(in Chinese).万旭荣.硫酸盐浸蚀下混凝土扩散反应过程的数值模拟[J].工业建筑,2010,40(s1):843.
    3 Zuo X B,Sun W.Full process analysis of damage and failure of concrete subjected to external sulfate attack[J].J Chin Ceram Soc,2009,37(7):1063(in Chinese).左晓宝,孙伟.硫酸盐浸蚀下的混凝土损伤破坏全过程[J].硅酸盐学报,2009,37(7):1063.
    4 Clifton J R,Ponnersheim J M Sulfate attack of cementitious materials:Volumetric relations and expansions[R].NISTIR,5390,Lewisburg:NIST,1994:7.
    5 Guo C L.Degradation mechanism of concrete due to calcium dissolution[D].Hangzhou:Zhejiang University,2012(in Chinese).郭春伶.钙溶蚀条件下混凝土性能劣化规律研究[D].杭州:浙江大学,2012.
    6 Carde C,Escadeillas G,Francois R.Use of ammonium nitrate solution to simulate and accelerate the leaching of cement pastes due to deionized waters[J].Mag Concr Res,1997,49(181):295.
    7 Jiao C J,Wei X F,Zhong H M,et al.Theory model and numerical simulation of the process of sulfate eroding concrete[J].J Guangzhou University:Nat Sci Ed,2013,12(4):38(in Chinese).焦楚杰,魂晓峰,钟海明,等.硫酸盐浸蚀混凝土的理论模型与数值仿真[J].广州大学学报:自然科学版,2013,12(4):38.
    8 Garboczi E J,Bentz D P.Computer simulation of the diffusivity of cement-based materials[J].Mater Sci,1992,27(8):2083.
    9 Zuo X B,Sun W,Li H,et al.Calculation of ion diffusion coefficient related to concrete deterioration based on Debye-Hlickel-Onsager theory[J].J Southeast University:English Ed,2010,26(4):569.
    10 Kuhl D,Meschke G.Computational modeling of transport mechanisms in reactive porous media-application to calcium leaching of concrete[J].Comput Model Concr Struct,2003:473.