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首页 > 过刊浏览>2023年第26卷第5期 >516-523. DOI:10.3969/j.issn.1007-9629.2023.05.009
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石灰岩机制砂混凝土抗冻性能研究
作者:
作者单位:

1.中国铁道科学研究院集团有限公司 铁道建筑研究所，北京 100081;2.中国铁道科学研究院集团有限公司 高速铁路轨道技术国家重点实验室，北京 100081

作者简介:

王 振（1993—），男，湖南岳阳人，中国铁道科学研究院集团有限公司助理研究员，硕士. E-mail：wangzhenbanana@163.com

通讯作者:

李化建（1976—），男，安徽阜阳人，中国铁道科学研究院集团有限公司研究员，博士生导师，博士. E-mail：chinasailor@163.com

中图分类号:

TU528.01

基金项目:

国家自然科学基金资助项目（U1934206）；中国铁道科学研究院集团有限公司院基金资助项目（2020YJ049，2021WR002）


Frost Resistance of Limestone Manufactured Sand Concrete
Author:
  • WANG Zhen 1,2

    WANG Zhen

    Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China
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  • LI Huajian 1,2

    LI Huajian

    Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China
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  • HUANG Fali 1,2

    HUANG Fali

    Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China
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  • YI Zhonglai 1,2

    YI Zhonglai

    Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China
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  • YANG Zhiqiang 1,2

    YANG Zhiqiang

    Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China
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Affiliation:

1.Railway Engineering Research Institute， China Academy of Railway Science Corporation Limited， Beijing 100081， China;2.State Key Laboratory for Track Technology of High-Speed Railway， China Academy of Railway Science Corporation Limited， Beijing 100081， China

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  • 参考文献 [24]
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    摘要:

    为探明石灰岩机制砂在严寒地区应用的合理性，以相对动弹性模量为评价指标，研究了混凝土强度等级、含气量和石粉含量对石灰岩机制砂混凝土抗冻性能的影响规律，采用吸水率和气泡间距系数分析了石灰岩机制砂混凝土冻融破坏原因. 结果表明：高强石灰岩机制砂混凝土具有高抗冻和破坏突发特征，提高混凝体强度等级或引入适量优质气泡是提高石灰岩机制砂混凝土抗冻性能的有效途径；当C30和C60石灰岩机制砂混凝土含气量分别为6.4%和4.4%时，混凝土的抗冻性能最佳；石灰岩石粉对混凝土性能有正、负双重效应，其含量控制在10.0%以内对混凝土抗冻性能、力学性能和工作性能有利.

    Abstract:

    In order to determine the appliability of the utilization of limestone manufactured sand in severe cold area， taking the relative dynamic elastic modulus as the evaluation index， the effects of strength， air content and powder content on the frost resistance of limestone manufactured sand concrete were studied， and the reasons of freeze-thaw failure of manufactured sand concrete were analyzed by water absorption and bubble spacing coefficient. The results show that high strength limestone manufactured sand concrete has the characteristics of high frost resistance and sudden failure. Increasing the strength and introducing appropriate amounts of bubbles are effective ways to improve the frost resistance of limestone manufactured sand concrete. The frost resistance is the best when the air content of C30 and C60 manufactured sand concrete is 6.4% and 4.4%， respectively. The limestone powder in manufactured sand has both positive and negative effects on the performance of concrete. The content of limestone powder in manufactured sand is controlled within 10.0%， which is beneficial to frost resistance， mechanical properties and workability.

    表 2 石灰岩机制砂混凝土配合比Table 2 Mix proportions of limestone manufactured sand concretes
    表 1 细骨料的主要性能Table 1 Main properties of fine aggregates
    图1 石灰岩石粉的粒度分布Fig.1 Particle size distribution of limestone powder
    图2 石灰岩机制砂混凝土抗压强度Fig.2 Compressive strength of limestone manufactured sand concretes
    图3 不同强度等级石灰岩机制砂混凝土抗冻性能Fig.3 Frost resistance of limestone manufactured sand concrete with different strength grades
    图4 石灰岩机制砂混凝土P-Δ曲线Fig.4 P-Δ curves of limestone manufactured sand concretes
    图5 不同强度等级石灰岩机制砂混凝土的吸水率Fig.5 Water absorption of limestone manufactured sand concretes with different strength grades
    图6 不同强度等级石灰岩机制砂混凝土的气泡间距系数Fig.6 Bubble spacing coefficient of limestone manufactured sand concretes with different strength grades
    图7 不同含气量石灰岩机制砂混凝土的抗压强度Fig.7 Compressive strength of limestone manufactured sand concretes with different air contents
    图8 不同含气量石灰岩机制砂混凝土的抗冻性能Fig.8 Frost resistance of limestone manufactured sand concretes with different air contents
    图9 不同含气量石灰石机制砂混凝土的48 h吸水率Fig.9 48 h water absorption of limestone manufactured sand concretes with different air contents
    图10 不同含气量石灰石机制砂混凝土的气泡间距系数Fig.10 Bubble spacing coefficient of limestone manufactured sand concretes with different air contents
    图11 不同石粉含量机制砂混凝土的工作性能Fig.11 Workability of manufactured sand concretes with different limestone powder contents
    图12 不同石粉含量机制砂混凝土的抗压强度Fig.12 Compressive strength of manufactured sand concretes with different limestone powder contents
    图13 不同石粉含量石灰石机制砂混凝土的抗冻性能Fig.13 Frost resistance of limestone manufactured sand concrete with different limestone powder contents
    图14 不同石粉含量石灰石机制砂混凝土的48 h吸水率Fig.14 48 h water absorption of limestone manufactured sand concretes with different limestone powder contents
    图15 不同石粉含量石灰石机制砂混凝土的气泡间距系数Fig.15 Bubble spacing coefficient of limestone manufacturedsand concretes with different powder contents
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王振,李化建,黄法礼,易忠来,杨志强.石灰岩机制砂混凝土抗冻性能研究[J].建筑材料学报,2023,26(5):516-523

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  • 收稿日期:2022-05-09
  • 最后修改日期:2022-06-01
  • 在线发布日期: 2023-06-08
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