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氯化钙激发粉煤灰基充填材料水化的机理及动力学特征

罗鹏翔 邓念东 解耿 邢聪聪 李宇新

罗鹏翔, 邓念东, 解耿, 邢聪聪, 李宇新. 氯化钙激发粉煤灰基充填材料水化的机理及动力学特征[J]. 环境工程, 2023, 41(6): 62-70. doi: 10.13205/j.hjgc.202306009
引用本文: 罗鹏翔, 邓念东, 解耿, 邢聪聪, 李宇新. 氯化钙激发粉煤灰基充填材料水化的机理及动力学特征[J]. 环境工程, 2023, 41(6): 62-70. doi: 10.13205/j.hjgc.202306009
LUO Pengxiang, DENG Niandong, XIE Geng, XING Congcong, LI Yuxin. HYDRATION MECHANISM AND KINETIC CHARACTERISTICS OF CaCl2 EXCITING FLY ASH PASTE FILLING MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 62-70. doi: 10.13205/j.hjgc.202306009
Citation: LUO Pengxiang, DENG Niandong, XIE Geng, XING Congcong, LI Yuxin. HYDRATION MECHANISM AND KINETIC CHARACTERISTICS OF CaCl2 EXCITING FLY ASH PASTE FILLING MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 62-70. doi: 10.13205/j.hjgc.202306009

氯化钙激发粉煤灰基充填材料水化的机理及动力学特征

doi: 10.13205/j.hjgc.202306009
基金项目: 

国家自然科学基金项目(41702377);中国博士后科学基金项目(2017M623208);陕西省自然科学基础研究计划项目(2017JQ4008)

详细信息
    作者简介:

    罗鹏翔(1998-),女,硕士生,主要研究方向为矿山环境恢复及后期治理。luopengxiang0115@163.com

    通讯作者:

    罗鹏翔(1998-),女,硕士生,主要研究方向为矿山环境恢复及后期治理。luopengxiang0115@163.com

HYDRATION MECHANISM AND KINETIC CHARACTERISTICS OF CaCl2 EXCITING FLY ASH PASTE FILLING MATERIALS

  • 摘要: 胶结充填材料的早期水化动力学特征是合理设计配比的重要前提。采用等温量热法测量了不同CaCl2浓度激发粉煤灰膏体充填材料(FPFM)的早期水化放热情况,基于Krstulovic-Dabic水化动力学模型对不同FPFM早期水化放热进行拟合,计算其水化动力学参数,对水化动力过程各阶段的变化特征进行分析,并对CaCl2的激发机理做出解释。结果表明:随着CaCl2浓度增加,FPFM水化热量从1.1 mW/g增大至2.9 mW/g,总累计放热量从16.4 J/g增大至29.6 J/g,诱导阶段和加速阶段持续时间缩短,使其水化反应速率加快,水化反应程度加深。CaCl2激发FPFM的水化机理均为成核和晶体生长(NG)→扩散(I)→相边界作用(D),随着CaCl2浓度增加,FPFM动力学参数均增大,I阶段持续时间延长,促进了粉煤灰的火山灰反应,产生了更多的水化产物。因此,通过对CaCl2激发FPFM早期水化动力学特征的研究,揭示了其结构演化的规律,对FPFM的现场应用提供理论参考。
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  • 收稿日期:  2022-06-17
  • 网络出版日期:  2023-09-02

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