[1]赵寄橦,童华炜,邱荣康,等.不同活性炭含量下MICP加固钙质砂的物理力学特性研究[J].西安建筑科技大学学报(自然科学版),2022,54(06):923-929939.[doi:10.15986/j.1006-7930.2022.06.016 ]
　ZHAO Jitong,TONG Huawei,QIU Rongkang,et al.Study on the physical and mechanical properties of MICP reinforced calcareous sand with different activated carbon content[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2022,54(06):923-929939.[doi:10.15986/j.1006-7930.2022.06.016 ]
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不同活性炭含量下MICP加固钙质砂的物理力学特性研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
54
期数:
2022年06期
页码:
923-929939
栏目:
西部“一带一路”沿线城镇绿色更新发展
出版日期:
2022-12-28

文章信息/Info

Title:
Study on the physical and mechanical properties of MICP reinforced calcareous sand with different activated carbon content
文章编号:
1006-7930(2022)06-0923-07
作者:
赵寄橦; 童华炜; 邱荣康; 刘家明; 袁 杰; 张子良
(广州大学 土木工程学院,广东 广州 510006)
Author(s):
ZHAO Jitong;  TONG Huawei;  QIU Rongkang;  LIU Jiaming;  YUAN Jie;  ZHANG Ziliang
(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)
关键词:
钙质砂加固;  活性炭;  吸附性;  细菌滞留率
Keywords:
cementing calcareous sand;  activated carbon;  adsorption;  bacterial retention rate
分类号:
TU472
DOI:
10.15986/j.1006-7930.2022.06.016
文献标志码:
A
摘要:
MICP是利用微生物诱导CaCO3沉淀的一项新型环保的地基处理技术,可以改善砂土的力学特性.目前,对MICP过程中细菌保留能力的相关研究相对较少,活性炭是一种具有吸附性的多孔结构物,利用活性炭的吸附性,可以增加细菌在试样中的滞留能力.基于活性炭的吸附作用,利用无侧限抗压强度试验、渗透试验及SEM电镜扫描研究了活性炭含量对MICP加固钙质砂的力学性能的影响.试验结果表明,在钙质砂中加入活性炭能够提高微生物诱导CaCO3沉淀的产量,对其无侧限抗压强度和渗透特性均有所改善,最佳活性炭掺量为0.75%,这也说明了在钙质砂中加入活性炭能够解决MICP加固过程中细菌滞留不足的问题,为后续提高细菌滞留率的研究提供了可靠的试验依据.
Abstract:
MICP is a new environmental protection foundation treatment technology which can improve the mechanical properties of sand soil by using microorganism to induce CaCO3 precipitation. At present, there are relatively few studies on the retention ability of bacteria in the MICP process. Activated carbon is a substance with a porous structure with adsorption, and the adsorption of activated carbon can increase the retention ability of bacteria in the sample. Based on the adsorption of activated carbon, the influence of activated carbon content on the mechanical properties of calcareous sand strengthened by MICP was studied by unconfined compressive strength test, permeability test and SEM scanning electron microscope. The test results show that adding activated carbon into calcareous sand can improve the output of microbial induced CaCO3 precipitation, the unconfined compressive strength and penetration characteristics are improved, the best activated carbon content is 0.75%, which shows in the calcareous sand adding activated carbon can solve the problem of insufficient in the reinforcement process where bacteria retention, retention rates for subsequent increase bacteria research provides a reliable experimental basis.

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备注/Memo

备注/Memo:
收稿日期:2020-06-16修改稿日期:2022-11-05
基金项目:国家青年科学基金资助项目(51908151)
第一作者:赵寄橦(1996—),男,博士生,主要从事微生物固化方面的研究.E-mail:1112116001@e.gzhu.edu.cn
通信作者:袁 杰(1986—),男,博士,副教授,主要从事软土蠕变特性以及微生物固化方面的研究.E-mail:yuanj@gzhu.edu.cn
更新日期/Last Update: 2022-12-28