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玄武岩纤维泡沫混凝土的细观结构及损伤特性

周程涛 陈波 张娟 李松

周程涛, 陈波, 张娟, 等. 玄武岩纤维泡沫混凝土的细观结构及损伤特性[J]. 复合材料学报, 2023, 42(0): 1-10.
引用本文: 周程涛, 陈波, 张娟, 等. 玄武岩纤维泡沫混凝土的细观结构及损伤特性[J]. 复合材料学报, 2023, 42(0): 1-10.
ZHOU Chengtao, CHEN Bo, ZHANG Juan, et al. Microstructure and damage characteristics of basalt fiber reinforced foam concrete[J]. Acta Materiae Compositae Sinica.
Citation: ZHOU Chengtao, CHEN Bo, ZHANG Juan, et al. Microstructure and damage characteristics of basalt fiber reinforced foam concrete[J]. Acta Materiae Compositae Sinica.

玄武岩纤维泡沫混凝土的细观结构及损伤特性

基金项目: 国家自然科学基金面上项目(52079049);国家重点实验室基本科研业务费(522012272;5230248 A2)
详细信息
    通讯作者:

    陈波,博士,教授,博士生导师,研究方向为水工混凝土新材料 E-mail: chenbo@hhu.edu.cn

  • 中图分类号: TU528.2

Microstructure and damage characteristics of basalt fiber reinforced foam concrete

Funds: The General Program of National Natural Science Foundation of China (52079049); Basic Scientific Research Business Expenses of National Key Laboratories (522012272; 5230248 A2)
  • 摘要: 为了研究玄武岩纤维增强泡沫混凝土的细观结构特征和不同纤维掺量对其损伤特性的影响,本文对密度等级1000 kg/cm3的玄武岩纤维增强泡沫混凝土开展了X-CT试验及单轴压缩-声发射联合试验,基于Avizo图像处理以及声发射$ {b}_{\mathrm{i}} $值(改进版b值)等参数分析了纤维及孔隙的细观结构特征以及材料损伤演化特性。结果表明:掺入玄武岩纤维可有效改善泡沫混凝土力学性能,掺入0.5vol%、1.5vol%、2.5vol%纤维后试件平均抗压强度分别提升了1.37 MPa、4.58 MPa、2.77 MPa;2.5vol%掺量的试件中纤维分形维数主要在1.0~1.3,纤维团聚明显,纤维角度集中,试件性能较1.5vol%掺量有所降低;掺入玄武岩纤维后试件声发射$ {b}_{\mathrm{i}} $值趋势更为平缓,玄武岩纤维可有效抑制裂纹发育。

     

  • 图  1  玄武岩纤维

    Figure  1.  Basalt fiber

    图  2  玄武岩纤维增强泡沫混凝土X-CT图像分析示意图

    Figure  2.  X-CT image analysis diagram of basalt fiber reinforced foam concrete

    图  3  泡沫混凝土中玄武岩纤维三维分布图

    Figure  3.  Three-dimensional distribution of basalt fiber in foam concrete

    图  4  玄武岩纤维三向均匀性分析图

    Figure  4.  Three-dimensional uniformity analysis diagram of basalt fiber

    图  5  空间方位角和极角示意图

    Figure  5.  Spatial azimuth and polar angle diagram

    图  6  纤维角度空间分布

    Figure  6.  Spatial distribution of fiber angle

    图  7  玄武岩纤维增强泡沫混凝土孔隙球形度

    Figure  7.  Basalt fiber reinforced foam concrete pore sphericity

    图  8  玄武岩纤维增强泡沫混凝土单轴压缩应力-应变曲线

    Figure  8.  Uniaxial compression stress-strain curve of basalt fiber reinforced foam concrete

    图  9  玄武岩纤维增强泡沫混凝土声发射信号参数

    Figure  9.  Acoustic emission signal parameters of basalt fiber reinforced foam concrete

    图  10  玄武岩纤维增强泡沫混凝土声发射$ {b}_{\mathrm{i}} $值

    Figure  10.  Acoustic emission $ {b}_{\mathrm{i}} $ value of basalt fiber reinforced foam concrete

    表  1  玄武岩纤维增强泡沫混凝土配合比

    Table  1.   Mix proportion of foam concrete

    Sample No. Mix proportion/(kg·m−3) Wet density/(kg·m−3) Dry density/(kg·m−3)
    Cement Water Foam Basalt fiber
    0%BF/FC-1 743.05 371.53 21.38 0 1170 1033
    0%BF/FC-2 743.05 371.53 21.38 0 1200 1046
    0%BF/FC-3 743.05 371.53 21.38 0 1180 1041
    0.5%BF/FC-1 743.05 371.53 21.38 4.2 1206 1052
    0.5%BF/FC-2 743.05 371.53 21.38 4.2 1200 1050
    0.5%BF/FC-3 743.05 371.53 21.38 4.2 1199 1048
    1.5%BF/FC-1 743.05 371.53 21.38 8.4 1169 1032
    1.5%BF/FC-2 743.05 371.53 21.38 8.4 1170 1035
    1.5%BF/FC-3 743.05 371.53 21.38 8.4 1172 1036
    2.5%BF/FC-1 743.05 371.53 21.38 12.6 1181 1045
    2.5%BF/FC-2 743.05 371.53 21.38 12.6 1203 1047
    2.5%BF/FC-3 743.05 371.53 21.38 12.6 1208 1050
    Notes: The specimen number as 0.5%BF/FC-1, where 0.5%BF/FC represents the volume ratio of basalt fiber, and 1 represents the specimen number.
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  • 收稿日期:  2023-09-27
  • 修回日期:  2023-10-20
  • 录用日期:  2023-11-02
  • 网络出版日期:  2023-11-23

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