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玄武岩纤维泡沫混凝土抗冻融性能

孙浩文 陈波 高志涵 郭凌云

孙浩文, 陈波, 高志涵, 等. 玄武岩纤维泡沫混凝土抗冻融性能[J]. 复合材料学报, 2024, 43(0): 1-13.
引用本文: 孙浩文, 陈波, 高志涵, 等. 玄武岩纤维泡沫混凝土抗冻融性能[J]. 复合材料学报, 2024, 43(0): 1-13.
SUN Haowen, CHEN Bo, GAO Zhihan, et al. Freeze-thaw resistance of basalt fiber reinforced foam concrete[J]. Acta Materiae Compositae Sinica.
Citation: SUN Haowen, CHEN Bo, GAO Zhihan, et al. Freeze-thaw resistance of basalt fiber reinforced foam concrete[J]. Acta Materiae Compositae Sinica.

玄武岩纤维泡沫混凝土抗冻融性能

基金项目: 国家自然科学基金项目(52079049;52239009);国家重点实验室基本科研业务费(522012272);国家资助博士后项目(GZC20230671); 江苏省卓越博士后项目(2023ZB703)
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;TB332

Freeze-thaw resistance of basalt fiber reinforced foam concrete

Funds: General Program of National Natural Science Foundation of China (52079049; 52239009); Basic Scientific Research Business Expenses of National Key Laboratories (522012272); National Funded Postdoctoral Program (GZC20230671); Jiangsu Province Outstanding Postdoctoral Program (2023ZB703)
  • 摘要: 在0、25、50和75次冻融循环条件下,对不同密度(600 kg/m31000 kg/m3)和纤维掺量(0、0.15%、0.30%和0.45%)的玄武岩纤维泡沫混凝土试样(Basalt fiber reinforced foam concrete, BFRFC)进行了单轴压缩-声发射联合试验,并基于声发射RA-AF值分布规律、b值变化曲线以及三个宏观抗冻性能指标(吸水率、质量损失率、相对动弹性模量),探究了BFRFC冻融劣化损伤特征与抗冻性能变化规律。结果表明:BFRFC单轴压缩过程中的应力-应变关系曲线具有明显阶段性;冻融循环会导致试样整体强度下降,开裂加快,内部剪切破坏占比提高,而增加玄武岩纤维掺量和材料密度均能够提高试样的峰值承载力(0、25、50和75次冻融循环下最高分别达到11.14 MPa、10.20 MPa、8.741 MPa、7.498 MPa),抑制峰值强度的损失(最多可降低17.9%),提高张拉破坏占比(最多可提高32.4%),延缓试件破坏;另外,随冻融循环次数的增加,BFRFC的吸水率和质量损失率增大,相对动弹性模量下降,相比之下,高密度和高纤维掺量BFRFC的吸水率和质量损失率更小、相对动弹性模量更大,75次冻融循环下质量损失率和相对动弹性模量仍能分别保持在3%以下和70%以上,抗冻性能更佳。

     

  • 图  1  试验方法与仪器

    Figure  1.  Test methods and apparatus

    图  2  冻融环境下各等级BFRFC试样的应力-应变关系曲线

    Figure  2.  Stress-strain relationship for different grades of BFRFC under different freeze-thaw cycles

    图  3  BFRFC代表性试样破坏面

    Figure  3.  Damage surface of representative BFRFC specimen

    图  4  冻融环境下各等级BFRFC峰值强度

    Figure  4.  Peak strength for different grades of BFRFC under different freeze-thaw cycles

    图  5  冻融环境下各等级BFRFC峰值强度损失率

    Figure  5.  Strength loss rate for different grades of BFRFC under different freeze-thaw cycles

    图  6  声发射各特征参数示意图

    Figure  6.  Definition of the AE parameters

    图  7  冻融环境下基于RA-AF值的BFRFC裂纹分类

    Figure  7.  Crack classification of BFRFC based on RA-AF under different freeze-thaw cycles

    图  8  不同冻融循环次数下BFRFC声发射b值

    Figure  8.  Acoustic emission b-value of BFRFC under different freeze-thaw cycles

    图  9  冻融环境下各等级BFRFC吸水率

    Figure  9.  Water absorption for different grades of BFRFC under different freeze-thaw cycles

    图  10  冻融环境下各等级BFRFC质量损失率

    Figure  10.  Mass loss for different grades of BFRFC under different freeze-thaw cycles

    图  11  冻融环境下各等级BFRFC相对动弹性模量

    Figure  11.  Relative dynamic elastic modulus for different grades of BFRFC under different freeze-thaw cycles

    表  1  玄武岩纤维增强泡沫混凝土的配合比

    Table  1.   Mix ratio of basalt fiber reinforced foam concrete

    Density levelCement/(kg·m−3)Water/(kg·m−3)Foam/(kg·m−3)Basalt fiber volume fraction/vol%Mass of basalt fiber/(kg·m−3)
    C06/P06416.67208.3335.490/0.15/0.3/0.450/4.2/8.4/12.6
    C10/P10743.05371.5321.830/0.15/0.3/0.450/4.2/8.4/12.6
    Notes: C06 and C10 represent cubic specimens with a density of 600 kg/m3 and 1000 kg/m3, respectively, while P06 and P10 represent prismatic specimens.
    下载: 导出CSV
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  • 收稿日期:  2024-08-20
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