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塑管−混凝土界面密闭性能改善措施

王俊颜 周田 吕梁胜 杨全兵

王俊颜, 周田, 吕梁胜, 杨全兵. 塑管−混凝土界面密闭性能改善措施[J]. 工程科学学报. doi: 10.13374/j.issn2095-9389.2020.06.21.002
引用本文: 王俊颜, 周田, 吕梁胜, 杨全兵. 塑管−混凝土界面密闭性能改善措施[J]. 工程科学学报. doi: 10.13374/j.issn2095-9389.2020.06.21.002
WANG Jun-yan, ZHOU Tian, LÜ Liang-sheng, YANG Quan-bing. Improvement of plastic pipe–concrete interface impermeability[J]. Chinese Journal of Engineering. doi: 10.13374/j.issn2095-9389.2020.06.21.002
Citation: WANG Jun-yan, ZHOU Tian, LÜ Liang-sheng, YANG Quan-bing. Improvement of plastic pipe–concrete interface impermeability[J]. Chinese Journal of Engineering. doi: 10.13374/j.issn2095-9389.2020.06.21.002

塑管−混凝土界面密闭性能改善措施

doi: 10.13374/j.issn2095-9389.2020.06.21.002
基金项目: 国家自然科学基金青年基金资助项目(51609172);浙江省交通运输厅科技资助项目(2019-GCKY-01)
详细信息
    通讯作者:

    E-mail:14529@tongji.edu.cn

  • 中图分类号: TU528.0

Improvement of plastic pipe–concrete interface impermeability

More Information
  • 摘要: 为改善塑管混凝土结构的界面密闭性能,研究了在塑管−混凝土界面粘贴一种双面压敏胶带——Preprufe胶带的作用。通过界面黏结强度、界面渗水高度和界面透气性实验,测得塑管混凝土结构的界面黏结强度、界面渗水高度、气体压力−时间衰减曲线,推导出界面渗透指数。试验结果表明,界面黏结强度与粘贴胶带的宽度的关系可初步认为符合幂函数分布,压敏性粘合剂胶层与液态混凝土在硬化过程中形成的黏结强度远大于普通黏性层与塑管间的黏结强度。粘贴Preprufe胶带可显著提高塑管−混凝土界面抗渗能力。界面渗透指数随粘贴胶带的宽度增大呈明显的递减趋势,粘贴220 mm宽胶带的塑管混凝土试件界面渗透指数仅为基准塑管混凝土试件的2.86%。Preprufe双面压敏胶带在改善塑管−混凝土界面密闭性能上有良好的表现。在工程应用中可综合考虑所需效果和价格成本来选取粘贴胶带的宽度。
  • 图  1  塑管−混凝土结构一体化成型

    Figure  1.  Integrated molding of plastic pipe–concrete structure

    图  2  Preprufe胶带的宏观与微观构造图。(a)宏观构造图;(b, c)微观构造图

    Figure  2.  Macrostructure and microstructure of the Preprufe tape: (a) macrostructure; (b, c) microstructure

    图  3  粘贴Preprufe双面胶带的塑管−混凝土试件

    Figure  3.  Plastic pipe–concrete specimens with the Preprufe double-sided tape

    图  4  塑管混凝土黏结强度的测试

    Figure  4.  Bond strength test of plastic-pipe/concrete

    图  5  界面渗水高度试验示意图

    Figure  5.  Interfacial water penetration height

    图  6  界面透气性测试系统。(a)示意图;(b)实物图

    Figure  6.  Interface airtightness test system: (a) diagram; (b) objects

    图  7  PRE-0压力−时间衰减曲线及其拟合曲线

    Figure  7.  Pressure–time decay curve and its fitting curve of PRE-0

    图  8  Preprufe胶带宽度与界面黏结强度的关系

    Figure  8.  Width of the Preprufe double-sided tape vs interface bonding strength

    图  9  核心混凝土渗水高度。(a)外表面;(b)内部

    Figure  9.  Seepage height of central concrete: (a) surface; (b) inner region

    图  10  压力−时间衰减曲线

    Figure  10.  Pressure–time decay curve

    图  11  Preprufe胶带宽度与衰减时间Td的关系。(a)常规数值刻度;(b)对数刻度

    Figure  11.  Width of the Preprufe double-sided tape vs decay time Td: (a) conventional numerical scale; (b) logarithmic scale

    图  12  Preprufe胶带宽度与界面渗透指数Ω的关系。(a)常规数值刻度;(b)对数刻度

    Figure  12.  Width of the Preprufe double-sided tape vs interface permeability index Ω: (a) conventional numerical scale; (b) logarithmic scale

    表  1  C40混凝土配合比及基本性能

    Table  1.   C40 concrete mix ratio and basic performance

    Water /(kg·m−3)Cement /(kg·m−3)Fine aggregate /(kg·m−3)Coarse aggregate /(kg·m−3)Slump /cm28 d compressive strength /MPa
    17635273211401852.0
    下载: 导出CSV

    表  2  粘贴不同宽度Preprufe双面胶带的塑管−混凝土界面密闭性能试验结果

    Table  2.   Test results of impermeability of plastic pipe−concrete interface with Preprefe tape of different widths

    SpecimensBond strength/
    kPa
    Interfacial water penetration heightInterfacial airtightness
    Water penetration height/cmPermeability coefficient/(10−7·cm·s−1)Decay time/sPermeability index, Ω/(10−3·s−1)
    PRE-044.613.852.381999.43
    PRE-5526303834.41
    PRE-110512012481.11
    PRE-2201070033490.27
    Note: The decay time refers to the time consumed when the pressure in the gasholder decays from 200 to 30 kPa
    下载: 导出CSV
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  • 收稿日期:  2020-06-21
  • 网络出版日期:  2021-03-17

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