+高级检索
掺稻壳灰与纤维素纤维混凝土抗氯离子渗透和抗冻性试验研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Experimental Study on Chloride Ion Penetration Resistance and Frost Resistance of Rice Husk Ash and Cellulose Fiber Admixed Concrete
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    为了研究水胶比、稻壳灰和纤维素纤维对混凝土耐久性能的影响,以稻壳灰掺量(0、10%和20%)、纤维素纤维掺量(0.7 kg/m3、1.1 kg/m3和1.6 kg/m3)和水胶比(0.37、0.41和0.45)为变量,通过9组正交试验得到3种因素对混凝土抗氯离子渗透性能和抗冻性能的影响规律,并分别建立了掺稻壳灰纤维混凝土质量损失率与相对动弹性模量的冻融预测模型. 结果表明:各因素对混凝土抗氯离子渗透性能和抗冻性能影响显著程度依次为:水胶比>稻壳灰掺量>纤维素纤维掺量;混凝土的抗氯离子渗透性能和抗冻性能随稻壳灰掺量的增加显著增强,随纤维素纤维掺量的增加呈先增强后减弱的趋势,在水胶比为0.37时最优;稻壳灰掺量为20%时,混凝土抗氯离子渗透性能最佳,抗冻性能最优;纤维素纤维掺量为1.1 kg/m3时,混凝土抗氯离子渗透性能最好,抗冻性能最强;增加稻壳灰掺量、添加适量的纤维素纤维可以提高混凝土基体的密实度、减少微裂缝,进而增强混凝土的耐久性能;所建立的掺稻壳灰纤维混凝土质量损失率与相对动弹性模量的冻融预测模型与试验结果吻合较好,具有一定的适用性,可为制备绿色高性能混凝土提供理论依据和支撑.

    Abstract:

    To study the influence of water-to-binder ratio, rice husk ash, and cellulose fiber on the durability performance of concrete, nine orthogonal tests were conducted with three variables: rice husk ash content (0, 10%, and 20%), cellulose fiber content (0.7 kg/m3, 1.1 kg/m3 and 1.6 kg/m3), and water-to-binder ratio (0.37, 0.41 and 0.45). The impact of these factors on chloride ion penetration resistance and freeze-thaw resistance of concrete was analyzed, and prediction models for mass loss rate and relative dynamic elastic modulus of rice husk ash and fiber concrete during freezing and thawing were established, separately. The results show that the degree of impact of each factor on chloride ion penetration resistance and freeze-thaw resistance of concrete is as follows in descending order: water-to-binder ratio > rice husk ash content > cellulose fiber content. The chloride ion penetration resistance and freeze-thaw resistance of concrete are significantly enhanced with increasing rice husk ash content, while it shows a trend of first enhancing and then weakening with increasing cellulose fiber content. The optimum performance is achieved at a water-to-binder ratio of 0.37. When the rice husk ash content is 20%, the concrete has the best chloride ion penetration resistance and the optimal freeze-thaw resistance. When the cellulose fiber content is 1.1 kg/m3, the concrete exhibits the best chloride ion penetration resistance and the strongest freeze-thaw resistance. Increasing the dosage of rice husk ash,and adding a suitable amount of cellulose fibers can improve the density of the concrete matrix, reduce microcracks, and enhance the durability performance of the concrete. The prediction model for the mass loss rate and relative dynamic modulus of elasticity of rice husk ash fiber concrete established is in good agreement with experimental results, and has a certain applicability. This can provide a theoretical basis and support for the preparation of green high-performance concrete.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

ZHENG Shansuo, LI Haochong?,RUAN Sheng, ZHOU Lin, YANG Feng, DONG Fangyuan.掺稻壳灰与纤维素纤维混凝土抗氯离子渗透和抗冻性试验研究[J].湖南大学学报:自然科学版,2024,(5):193~206

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2024-05-30
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭