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Effect of Fly Ash on Resistance to Sulfate Attack of Cement-based Materials

机译：粉煤灰对水泥基材料抗硫酸盐侵蚀的影响

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摘要

The resistance to sulfate attack of mortars containing 0%, 20%, and 40% of fly ash cured in 5 wt. % sodium sulfate solution at 20℃ was investigated in this paper. Visual appearance, cracking analysis, velocity of ultrasonic wave and length change were applied to evaluate the sulfate resistance of mortars. The phases and microstructure of the reaction products due to sulfate attack were examined by XRD and SEM, and the pore structure of the mortars was analyzed by MIP. The effects of fly ash on the sulfate attack of mortars were analyzed. Results indicated that the addition of fly ash improved the resistance of sulfate attack significantly, this probably contributed to the pozzonlanic reaction of fly ash.
机译：含有0％，20％和40％的粉煤灰的砂浆经5 wt。％的固化后对硫酸盐侵蚀的抵抗力。本文研究了20％的硫酸钠溶液。用外观，裂纹分析，超声波速度和长度变化来评估砂浆的抗硫酸盐性。用XRD和SEM观察了硫酸盐侵蚀引起的反应产物的相和微观结构，用MIP分析了砂浆的孔隙结构。分析了粉煤灰对砂浆硫酸盐侵蚀的影响。结果表明，粉煤灰的添加显着提高了抗硫酸盐侵蚀的能力，这可能有助于粉煤灰的火山灰反应。

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  • 来源
  • 会议地点 Shanghai(CN)
  • 作者

    Kaiwei Liu; Min Deng; Liwu Mo;

  • 作者单位

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sulfate attack; Ettringite; Gypsum; Fly ash;

    机译：硫酸盐侵蚀；钙矾石;石膏;粉煤灰;

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