脲酶诱导碳酸钙沉淀技术改良传统三合土的性能
作者:
作者单位:

江苏师范大学 历史文化与旅游学院,江苏 徐州 221116

作者简介:

董 瑾(1996—),女,江苏淮安人,江苏师范大学硕士生. E-mail: dongjin19961121@163.com

通讯作者:

刘效彬(1982—),男,河南周口人,江苏师范大学副教授,硕士生导师,博士. E-mail: 11204063@zju.edu.cn

中图分类号:

TU52

基金项目:

国家自然科学基金资助项目(51608236)


Performance of Traditional Tabia Improved by Enzyme Induced Calcite Precipitation Technology
Author:
Affiliation:

School of History Culture and Tourism, Jiangsu Normal University, Xuzhou 221116, China

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
  • |
  • 文章评论
    摘要:

    采用扫描电镜、X射线衍射等研究了脲酶诱导碳酸钙沉淀(EICP)技术对三合土性能的影响.结果表明:随着豆粉质量浓度的增大,脲酶活性呈近似线性增长,其最适宜的环境pH值为3~11,当环境pH值为12时,脲酶活性急剧下降;与三合土空白样相比,脲酶改性三合土14 d碳化深度提高了94%~112%,28 d抗压强度提高了68.0%~103.0%,耐候性提高了150%~200%,60 d表面硬度提高了15.0%~18.3%;三合土空白样产生的碳酸钙晶体松散,脲酶的掺入使三合土中出现了长条状晶体和团簇状晶体,且随着豆粉质量浓度的增大,团簇状晶体相对增多,长条状晶体相对减少,使三合土的各项性能逐渐提高.

    Abstract:

    The effect of enzyme induced calcite precipitation (EICP) technology on the properties of tabia was studied by means of scanning electron microscope and X-ray diffractometry. The results show that urease activity increases approximately linearly with increasing of soybean powder mass concentration, and its optimum pH value is 3-11. When the pH value is 12, the activity drops sharply. Compared with the control sample of tabia, the carbonization speed of tabia modified with urease increases by 94%-112% in 14 days, the compressive strength increases by 68%-103% in 28 days, the weather resistance increases by 150%-200%, the surface hardness increases by 15.0%-18.3% in 60 days. The calcium carbonate crystals produced by the control sample of tabia are loose. After adding urease, long-strip crystals and cluster-like crystals appear in the tabia, and with the increase of soybean powder mass concentration, the cluster-like crystals increase relatively, and the long-strip crystals decrease relatively, the performance of tabia also gradually improves.

    参考文献
    相似文献
    引证文献
引用本文

董瑾,刘效彬.脲酶诱导碳酸钙沉淀技术改良传统三合土的性能[J].建筑材料学报,2022,25(8):853-859

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-05-31
  • 最后修改日期:2021-07-06
  • 录用日期:
  • 在线发布日期: 2023-09-15
  • 出版日期: