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首页> 外文期刊>Construction and Building Materials >Aminobenzoate modified Mg-Al hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications
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Aminobenzoate modified Mg-Al hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications

机译:氨基苯甲酸酯改性的Mg-Al水滑石粉作为新型智能钢筋混凝土防腐剂,用于防腐​​应用

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摘要

A carbonate form of Mg-Al hydrotalcite, Mg(2)Al-CO_3 and its p-aminobenzoate (pAB) modified derivative, Mg(2)Al-pAB, were synthesized and characterized by means of XRD, FT-IR and TG/DSC. The anticorrosion behavior of Mg(2)Al-pAB was evaluated based on open circuit potential (OCP) of carbon steel in simulated concrete pore solution and on chloride-exchange experiments. The results reported in this paper demonstrate that ion-exchange indeed occurred between chlorides and intercalated pAB anions, thereby reducing the free chloride concentration in simulated concrete pore solution. The simultaneously released pAB anions were found to exhibit the envisioned inhibiting effect and caused corrosion initiation of the steel to shift to higher chloride concentrations than without the modified hydrotalcites.
机译:合成了碳酸盐形式的Mg-Al水滑石Mg(2)Al-CO_3及其对氨基苯甲酸酯(pAB)改性衍生物Mg(2)Al-pAB,并通过XRD,FT-IR和TG / DSC。基于碳钢在模拟混凝土孔隙溶液中的开路电位(OCP)和氯化物交换实验,评估了Mg(2)Al-pAB的防腐行为。本文报道的结果表明,在氯化物和嵌入的pAB阴离子之间确实发生了离子交换,从而降低了模拟混凝土孔隙溶液中的游离氯浓度。发现同时释放的pAB阴离子表现出预想的抑制作用,并导致钢的腐蚀引发转变为比未使用改性水滑石时更高的氯化物浓度。

著录项

  • 来源
    《Construction and Building Materials》 |2013年第10期|1436-1443|共8页
  • 作者单位

    Materials Innovation Institute (M2i), P.O. Box 5008, 2600 GA Delft, The Netherlands,Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands;

    TNO Materials Performance, P.O. Box 6235, 5600 HE Eindhoven, The Netherlands;

    Materials Innovation Institute (M2i), P.O. Box 5008, 2600 GA Delft, The Netherlands,Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands;

    Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands;

    Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands,TNO Building Materials, P.O. Box 49, 2600 AA Delft, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Modified hydrotalcites; Reinforced concrete; Corrosion; Chloride scavenger; Smart additives;

    机译:改性水滑石;钢筋混凝土;腐蚀;氯化物清除剂;智能添加剂;

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