| 海水化学成分对水泥基材料的侵蚀 |
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| 引用本文： | 李中华,冯树荣,苏超,马敬畏. 海水化学成分对水泥基材料的侵蚀[J]. 混凝土, 2012, 0(5): 8-11 |
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| 作者姓名： | 李中华 冯树荣 苏超 马敬畏 |
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| 作者单位： | 河海大学力学与材料学院;河海大学水利水电学院;中国水电顾问集团中南勘测设计研究院 |
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| 基金项目： | 中国博士后基金项目(20110491348);江苏省博士后基金项目(1101019C);中央高校基本科研业务费项目(2010B25314);河海大学引进人才基金项目(20090602);河海大学自然科学基金项目(2009423411);河海大学大学生创新项目(NJ2011069) |
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| 摘 要： | 针对水泥基材料受海水腐蚀的情况,通过质量损失率、抗压强度损失率、抗渗性能及外观分析,评价水泥基材料在10倍海水浓度各化学成分长期浸泡下的抗腐蚀性能。结果表明在海水的主要成分中,对水泥基材料侵蚀性能由大到小的顺序为MgSO4、K2SO4、MgCl2、NaCl。降低水胶比和添加掺合料可以有效提高水泥基材料抗海水腐蚀性能。在长期浸泡条件下,海水化学成分对水泥基材料的侵蚀破坏分别表现为Mg(OH)2和钙矾石的生成。主要侵蚀成分为Mg2+和SO42-,其中SO42-略严重,二者复合对水泥基材料侵蚀更加严重。
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| 关 键 词： | 水泥基材料 海水 掺合料 水灰比 |
Corrossion of seawater element on cement based materials |
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| LI Zhong-hua,a,b,FENG Shu-rong,SU Chao,b,MA Jing-wei. Corrossion of seawater element on cement based materials[J]. Concrete, 2012, 0(5): 8-11 |
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| Authors: | LI Zhong-hua a b FENG Shu-rong SU Chao b MA Jing-wei |
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| Affiliation: | 1a(1a.College of Mechanics and Materials;b.College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China; 2.Mid-South Design and Research Institute,CHECC,Changsha 410014,China) |
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| Abstract: | In connection with corrosion of seawater on cement-based materials,corrossion resistance of cement-based materials were evaluated by mass loss rate,loss rate of compressive strength,Penetration resistance and external appearance change under marinated in each chemical composition of seawater with 10 time concentration.The results showed that order of corrosion was MgSO4>K2SO4>MgCl2>NaCl.Decreasing water-cement ratio and adding admixture can effectively increased corrosion resistance of cement based materials.Corrosion of seawater on cement-based material was because that Mg(OH)2 and AFt were produced.The main corrosion composition were Mg2+ and SO42-.Corrosion of SO42- was more seriously and after coupling of both corrosion of cement-based materials were aggravated. |
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| Keywords: | cement based materials seawater admixture water and cement ratio |
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