• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
成果搜索

author:

Li, Shuang (Li, Shuang.) [1] | Huang, Ming (Huang, Ming.) [2] (Scholars:黄明) | Cui, Mingjuan (Cui, Mingjuan.) [3] (Scholars:崔明娟) | Lin, Peng (Lin, Peng.) [4] | Xu, Liudi (Xu, Liudi.) [5] | Xu, Kai (Xu, Kai.) [6]

Indexed by:

EI Scopus SCIE

Abstract:

Soft soil ground is a crucial factor limiting the development of the construction of transportation infrastructure in coastal areas. Soft soil is characterized by low strength, low permeability and high compressibility. However, the ordinary treatment method uses Portland cement to solidify the soft soil, which has low early strength and requires a long curing time. Microbially induced carbonate precipitation (MICP) is an emerging method to address geo-environmental problems associated with geotechnical materials. In this study, a method of bio-cementitious mortars consisting of MICP and cement was proposed to stabilize the soft soil. A series of laboratory tests were conducted on MICP-treated and cement-MICP-treated (C-MICP-treated) soft soils to improve mechanical properties. Microscale observations were also undertaken to reveal the underlying mechanism of cement-soil treated by MICP. The results showed that cohesion and internal friction angles of MICP-treated soft soil were greater than those of remolded soft soil. The UCS, elastic modulus and toughness of C-MICP-treated soft soil with high moisture content (50%, 60%, 70%, 80%) were improved compared to traditional cement-soil. A remarkable difference was observed that the MICP process mainly played a role in the early curing stage (i.e., within 14 days) while cement hydration continued during the whole process. Micro-characterization revealed that the calcium carbonate filling the pores enhanced the soft soil.

Keyword:

cement-soil mechanical properties MICP soft soil foundation

Community:

  • [ 1 ] [Li, Shuang]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Huang, Ming]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Cui, Mingjuan]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Xu, Kai]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 5 ] [Lin, Peng]Shantou Univ, Dept Civil & Environm Engn, Shantou 515063, Guangdong, Peoples R China
  • [ 6 ] [Xu, Liudi]Shantou Univ, Dept Civil & Environm Engn, Shantou 515063, Guangdong, Peoples R China

Reprint 's Address:

Show more details

Related Keywords:

Source :

GEOMECHANICS AND ENGINEERING

ISSN: 2005-307X

Year: 2023

Issue: 1

Volume: 35

Page: 95-108

2 . 5

JCR@2023

2 . 5 0 0

JCR@2023

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 2

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

Online/Total:188/9552187
Address:FZU Library(No.2 Xuyuan Road, Fuzhou, Fujian, PRC Post Code:350116) Contact Us:0591-22865326
Copyright:FZU Library Technical Support:Beijing Aegean Software Co., Ltd. 闽ICP备05005463号-1