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甲酸钙对砂浆抗氯离子侵蚀性能的影响
Effect of Calcium Formate on the Resistance to Chloride Ion Erosion of Cement Mortar
2020年第11期
甲酸钙;耐久性;氯离子侵蚀;电化学测试;微观测试
Calcium formate; Durability; Chloride ion erosion; Electrochemical testing; Microscopic test
2020年第11期
10.19761/j.1000-4637.2020.11.006.05
国家重点研发计划项目(2018YFC1508704)。
贲询钦,蒋林华,孟远远,靳卫准,陈 磊,王 飞
河海大学 力学与材料学院,江苏 南京210098

贲询钦,蒋林华,孟远远,靳卫准,陈 磊,王 飞

摘   要:采用RCM法、电位滴定法研究了甲酸钙对水泥砂浆中氯离子扩散系数及氯离子含量的影响,通过测定不同浸泡龄期试件的自腐蚀电位、电化学阻抗谱研究了甲酸钙对砂浆中钢筋锈蚀的影响,采用XRD、SEM分析了甲酸钙对砂浆中水泥水化产物及微观形貌的影响。研究结果表明:甲酸钙能使水泥砂浆中的氯离子扩散系数增大,并随着水胶比增大,孔隙液中自由氯离子含量提高,总氯离子含量增大;甲酸钙使水泥砂浆浸泡NaCl溶液后的Friedel盐及Ca(OH)2含量减少,溶液pH值降低,氯离子更易到达钢筋表面,加速了水泥砂浆中钢筋的腐蚀。

Abstract: RCM method and potentiometric titration method were used to study the effect of calcium formate on chloride diffusion coefficient and chloride content in cement mortar. The effect of calcium formate on the corrosion of steel bars in mortar was studied by measuring the self-corrosion potential and electrochemical impedance spectroscopy of samples with different soaking ages. The effects of calcium formate on cement hydration products and microstructure in mortar were analyzed by XRD and SEM. The results show that calcium formate increases the diffusion coefficient of chloride ions in cement mortar. With the increase of water-binder ratio, calcium formate increases the content of total chloride ions and free chloride ions in pore solution. The content of Friedel′s salt and Ca(OH)2 decreases after the cement mortar soaked in NaCl solution, and the pH value of the solution decreases, and the chloride ions are more likely to reach the surface of the steel bar. Calcium formate accelerates the corrosion of reinforcement in cement mortar.

贲询钦,蒋林华,孟远远,等.甲酸钙对砂浆抗氯离子侵蚀性能的影响[J].混凝土与水泥制品,2020(11):6-9,14.

BEN X Q,JIANG L H,MENG Y Y,et al.Effect of Calcium Formate on the Resistance to Chloride Ion Erosion of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):6-9,14.

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摘   要:采用RCM法、电位滴定法研究了甲酸钙对水泥砂浆中氯离子扩散系数及氯离子含量的影响,通过测定不同浸泡龄期试件的自腐蚀电位、电化学阻抗谱研究了甲酸钙对砂浆中钢筋锈蚀的影响,采用XRD、SEM分析了甲酸钙对砂浆中水泥水化产物及微观形貌的影响。研究结果表明:甲酸钙能使水泥砂浆中的氯离子扩散系数增大,并随着水胶比增大,孔隙液中自由氯离子含量提高,总氯离子含量增大;甲酸钙使水泥砂浆浸泡NaCl溶液后的Friedel盐及Ca(OH)2含量减少,溶液pH值降低,氯离子更易到达钢筋表面,加速了水泥砂浆中钢筋的腐蚀。 Abstract: RCM method and potentiometric titration method were used to study the effect of calcium formate on chloride diffusion coefficient and chloride content in cement mortar. The effect of calcium formate on the corrosion of steel bars in mortar was studied by measuring the self-corrosion potential and electrochemical impedance spectroscopy of samples with different soaking ages. The effects of calcium formate on cement hydration products and microstructure in mortar were analyzed by XRD and SEM. The results show that calcium formate increases the diffusion coefficient of chloride ions in cement mortar. With the increase of water-binder ratio, calcium formate increases the content of total chloride ions and free chloride ions in pore solution. The content of Friedel′s salt and Ca(OH)2 decreases after the cement mortar soaked in NaCl solution, and the pH value of the solution decreases, and the chloride ions are more likely to reach the surface of the steel bar. Calcium formate accelerates the corrosion of reinforcement in cement mortar.
英文名 : Effect of Calcium Formate on the Resistance to Chloride Ion Erosion of Cement Mortar
刊期 : 2020年第11期
关键词 : 甲酸钙;耐久性;氯离子侵蚀;电化学测试;微观测试
Key words : Calcium formate; Durability; Chloride ion erosion; Electrochemical testing; Microscopic test
刊期 : 2020年第11期
DOI : 10.19761/j.1000-4637.2020.11.006.05
文章编号 :
基金项目 : 国家重点研发计划项目(2018YFC1508704)。
作者 : 贲询钦,蒋林华,孟远远,靳卫准,陈 磊,王 飞
单位 : 河海大学 力学与材料学院,江苏 南京210098

贲询钦,蒋林华,孟远远,靳卫准,陈 磊,王 飞

摘   要:采用RCM法、电位滴定法研究了甲酸钙对水泥砂浆中氯离子扩散系数及氯离子含量的影响,通过测定不同浸泡龄期试件的自腐蚀电位、电化学阻抗谱研究了甲酸钙对砂浆中钢筋锈蚀的影响,采用XRD、SEM分析了甲酸钙对砂浆中水泥水化产物及微观形貌的影响。研究结果表明:甲酸钙能使水泥砂浆中的氯离子扩散系数增大,并随着水胶比增大,孔隙液中自由氯离子含量提高,总氯离子含量增大;甲酸钙使水泥砂浆浸泡NaCl溶液后的Friedel盐及Ca(OH)2含量减少,溶液pH值降低,氯离子更易到达钢筋表面,加速了水泥砂浆中钢筋的腐蚀。

Abstract: RCM method and potentiometric titration method were used to study the effect of calcium formate on chloride diffusion coefficient and chloride content in cement mortar. The effect of calcium formate on the corrosion of steel bars in mortar was studied by measuring the self-corrosion potential and electrochemical impedance spectroscopy of samples with different soaking ages. The effects of calcium formate on cement hydration products and microstructure in mortar were analyzed by XRD and SEM. The results show that calcium formate increases the diffusion coefficient of chloride ions in cement mortar. With the increase of water-binder ratio, calcium formate increases the content of total chloride ions and free chloride ions in pore solution. The content of Friedel′s salt and Ca(OH)2 decreases after the cement mortar soaked in NaCl solution, and the pH value of the solution decreases, and the chloride ions are more likely to reach the surface of the steel bar. Calcium formate accelerates the corrosion of reinforcement in cement mortar.

贲询钦,蒋林华,孟远远,等.甲酸钙对砂浆抗氯离子侵蚀性能的影响[J].混凝土与水泥制品,2020(11):6-9,14.

BEN X Q,JIANG L H,MENG Y Y,et al.Effect of Calcium Formate on the Resistance to Chloride Ion Erosion of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):6-9,14.

摘要
参数
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参考文献
引用本文

摘   要:采用RCM法、电位滴定法研究了甲酸钙对水泥砂浆中氯离子扩散系数及氯离子含量的影响,通过测定不同浸泡龄期试件的自腐蚀电位、电化学阻抗谱研究了甲酸钙对砂浆中钢筋锈蚀的影响,采用XRD、SEM分析了甲酸钙对砂浆中水泥水化产物及微观形貌的影响。研究结果表明:甲酸钙能使水泥砂浆中的氯离子扩散系数增大,并随着水胶比增大,孔隙液中自由氯离子含量提高,总氯离子含量增大;甲酸钙使水泥砂浆浸泡NaCl溶液后的Friedel盐及Ca(OH)2含量减少,溶液pH值降低,氯离子更易到达钢筋表面,加速了水泥砂浆中钢筋的腐蚀。

Abstract: RCM method and potentiometric titration method were used to study the effect of calcium formate on chloride diffusion coefficient and chloride content in cement mortar. The effect of calcium formate on the corrosion of steel bars in mortar was studied by measuring the self-corrosion potential and electrochemical impedance spectroscopy of samples with different soaking ages. The effects of calcium formate on cement hydration products and microstructure in mortar were analyzed by XRD and SEM. The results show that calcium formate increases the diffusion coefficient of chloride ions in cement mortar. With the increase of water-binder ratio, calcium formate increases the content of total chloride ions and free chloride ions in pore solution. The content of Friedel′s salt and Ca(OH)2 decreases after the cement mortar soaked in NaCl solution, and the pH value of the solution decreases, and the chloride ions are more likely to reach the surface of the steel bar. Calcium formate accelerates the corrosion of reinforcement in cement mortar.

关键词:
氯离子
the
of
and
in
chloride
formate
calcium
cement
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(1)甲酸钙增大了水泥砂浆中氯离子扩散系数。掺入甲酸钙的水泥砂浆内部自由氯离子及总氯离子含量增多,抗氯离子侵蚀性能下降。
(2)甲酸钙使得水泥砂浆的容抗弧直径增大、Bode角增大,对电化学阻抗谱测试的容抗贡献作用降低,水泥砂浆内部孔隙结构疏松,密实度下降,钢筋腐蚀程度提高。
(3)甲酸钙使得水泥砂浆浸泡NaCl溶液后孔隙液pH值降低,砂浆内部AFm的量减少,浸泡NaCl溶液后Friedel盐的生成量较少,溶液中自由氯离子含量较多,加快了水泥砂浆中钢筋的锈蚀。

[1] 张慢.化学外加剂对水泥水化的历程的调控及作用机理研究[D].武汉:武汉理工大学,2010.
[2] HEIKAL M.Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes[J].Cement and Concrete Research,2004,34(6):1051-1056.
[3] KIM D M,RYU H S,SHIN S H,et al.Properties of Calcium Acetate Manufactured with Etching Waste Solution and Limestone Sludge as a Cementitious High-Early-Strength Admixture[J].Advances in Materials Science and Engineering, 2016:2920370.
[4] 杨晓.常用早强剂对砂浆早期收缩和开裂性能的影响[D].哈尔滨:哈尔滨工业大学,2014.
[5] GIEBSON C,SEYFARTH K,STARK J.Influence of acetate and formate-based deicers on ASR in airfield concrete pavements[J].Cement and Concrete Research,2010(40):537-545.
[6] 施锦杰,孙伟.混凝中钢筋锈蚀研究现状与热点问题分析[J].硅酸盐学报,2010,38(9):1753-1764.
[7] ENEVOLDSEN J N,HANSSON C M.Hope Binding of Chloride in Mortar Containing Admixed or Penetrated Chlorides[J].Cement and Concrete Research,1994,24(8):1525-1533.
[8] RIVERA-CORRAL J O,FAJARDO G,ARLIGUIE G,et al.Corrosion behavior of steel reinforcement bars embedded in concrete exposed to chlorides: Effect of surface finish[J].Construction and Building Materials,2017,147:815-826.
[9] JIANG S B,JIANG L H,WANG Z Y,et al.Deoxyribonucleic acid as an inhibitor for chloride-induced corrosion of reinforcing steel insimulated concrete poresolutions[J].Construction and Building Materials,2017,150:238-247.
[10] 史美伦,陈志源.混凝土阻抗谱的低频特性[J].硅酸盐学报,1996(6):97-100.
[11] 吕周岭,罗英,马保国,等.纳米二氧化硅对水泥-粉煤灰体系氯离子固化能力的影响[J].硅酸盐通报,2019,38(7):1997-2003.

贲询钦,蒋林华,孟远远,.甲酸钙对砂浆抗氯离子侵蚀性能的影响[J].混凝土与水泥制品,2020(11):6-9,14.

BEN X Q,JIANG L H,MENG Y Y,et al.Effect of Calcium Formate on the Resistance to Chloride Ion Erosion of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):6-9,14.

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