PMID- 37834485
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231020
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 19
DP  - 2023 Sep 22
TI  - Experimental Study on Bio-Reinforcement of Calcareous Sand through Hydrochloric 
      Acid Solution Precipitation into Cementing Solution.
LID - 10.3390/ma16196348 [doi]
LID - 6348
AB  - Microbially induced carbonate precipitation (MICP) technology holds great 
      potential in enhancing soil properties. MICP can be employed to enhance the 
      stability and strength of diverse sandy soil, but it has the shortcoming of low 
      curing efficiency. In response to the identified problem, this study aims to 
      investigate an optimized treatment protocol that involves formulating a cementing 
      solution in a hydrochloric acid (HCl) solution to enhance the solidification rate 
      in the MICP reaction and evaluate its effectiveness. The results indicate that 
      when preparing a 1 M cementing solution in a 0.2 M HCl solution, it promotes the 
      rapid bonding of calcareous sand particles, resulting in an unconfined 
      compressive strength (UCS) of 1312.6 kPa in the sand column after five 
      treatments. Compared to the conventional test group, the experimental group 
      containing HCl exhibited an approximately 1357% increase in UCS. The analysis 
      unveiled the pivotal role of metal ions dissolved from calcareous sand by HCl in 
      enhancing the UCS of MICP-treated calcareous sand. The proposed experimental 
      methodology serves as a valuable tool for designing treatment strategies for 
      MICP-cemented calcareous sand in practical engineering applications.
FAU - Jiang, Zhao
AU  - Jiang Z
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Wei, Renjie
AU  - Wei R
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Dai, Di
AU  - Dai D
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Li, Liangliang
AU  - Li L
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Shang, Zhiyang
AU  - Shang Z
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Tang, Jiahui
AU  - Tang J
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Peng, Jie
AU  - Peng J
AUID- ORCID: 0000-0003-4747-568X
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Li, Ping
AU  - Li P
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
LA  - eng
PT  - Journal Article
DEP - 20230922
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC10573922
OTO - NOTNLM
OT  - MICP
OT  - UCS
OT  - calcareous sand
OT  - hydrochloric acid
OT  - reinforcement efficiency
COIS- The authors declare no conflict of interest.
EDAT- 2023/10/14 10:45
MHDA- 2023/10/14 10:46
PMCR- 2023/09/22
CRDT- 2023/10/14 01:05
PHST- 2023/08/29 00:00 [received]
PHST- 2023/09/16 00:00 [revised]
PHST- 2023/09/18 00:00 [accepted]
PHST- 2023/10/14 10:46 [medline]
PHST- 2023/10/14 10:45 [pubmed]
PHST- 2023/10/14 01:05 [entrez]
PHST- 2023/09/22 00:00 [pmc-release]
AID - ma16196348 [pii]
AID - materials-16-06348 [pii]
AID - 10.3390/ma16196348 [doi]
PST - epublish
SO  - Materials (Basel). 2023 Sep 22;16(19):6348. doi: 10.3390/ma16196348.