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Effect of sulfate mine water on the durability of filling paste

机译：硫酸矿水对填充浆耐久性的影响

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摘要

In order to research the influence of high-sulfate mine water on filling paste, the macroscopic and microstructural changes of the filling paste in the sulfate environment were analyzed by uniaxial compression tests, X-ray diffraction (XRD) and scanning electron microscope (SEM). The mechanism of deterioration and cracking was discussed. The experimental results show that there are numerous gelling materials in the specimen during the curing period, which can increase the strength of the specimen. After cured paste specimen was soaked in sulfate solution for less than 90 days, the hydration reaction continued, the gelling substance was produced and the sulfate formed the filling material, which caused the compressive strength of the paste specimen to increase with the increase of immersion age. The compressive strength of the specimen was higher than that of the specimen soaked in water. The gypsum and ettringite formed in the specimen filled the void of the specimen after immersion in sulfate solution for more than 90 days, destroying the original cementing structure of the specimen, and the compressive strength of the specimen began to decrease with the increase of the immersion age. The compressive strength of the cured paste specimen after being soaked in sulfate solution for more than 180 days was lower than that of the specimen soaked in clear water and the larger the solution concentration, the longer the immersion time, the smaller the compressive strength of the specimen, and the more significant the deterioration effect is.
机译：为了研究高硫酸盐矿泉水对填充浆的影响，通过单轴压缩试验，X射线衍射（XRD）和扫描电子显微镜（SEM）分析了硫酸盐环境中填充浆的宏观和微观结构变化。 。讨论了劣化和开裂的机理。实验结果表明，在固化过程中样品中存在多种胶凝材料，可以提高样品的强度。将固化的糊状样品浸泡在硫酸盐溶液中少于90天后，继续水化反应，产生胶凝物质，并且硫酸盐形成填充材料，这导致糊状样品的抗压强度随着浸入年龄的增加而增加。 。样品的抗压强度高于浸泡在水中的样品。样品中形成的石膏和钙矾石浸入硫酸盐溶液中超过90天后充满了样品的空隙，破坏了样品的原始胶结结构，并且样品的抗压强度随着浸入度的增加而开始下降。年龄。固化后的糊状样品在硫酸盐溶液中浸泡超过180天后的抗压强度低于浸泡在清水中的样品，溶液浓度越大，浸没时间越长，则其抗压强度越小。样品，其劣化效果越显着。

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  • 来源
    《International journal of green energy》 |2018年第15期|864-873|共10页
  • 作者

    Liu Yin; Lu Yao; Wang Changxiang; Cui Boqiang; Guo Hao; Li Hao; Guo Yalan;

  • 作者单位

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Inst Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao, Peoples R China;

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

    Durability; filling paste; mechanics; microscopic analysis; sulfate deterioration;

    机译：耐久性;填充胶;力学;显微分析;硫酸盐变质;

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