PMID- 37687550
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230911
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 17
DP  - 2023 Aug 26
TI  - Shear Strength Behaviors of Aeolian Sand Solidified by Microbially Induced 
      Calcite Precipitation and Basalt Fiber Reinforcement.
LID - 10.3390/ma16175857 [doi]
LID - 5857
AB  - Aeolian sand flow is identified as the main factor in the formation of 
      sandstorms. However, conventional sand fixation methods cannot meet the current 
      development requirements of environmental protection. In this paper, the method 
      using Microbially Induced Calcite Precipitation (MICP) combined with basalt fiber 
      reinforcement (BFR) was adopted to solidify the aeolian sand. Consolidated 
      undrained triaxial shear tests were carried out to analyze the influence of fiber 
      content, fiber length, confining pressure, and other factors on stress-strain 
      characteristics, peak strength, brittleness index, and shear strength of aeolian 
      sand. A shear strength model of aeolian sand solidification using MICP-BFR and 
      considering the effect of fiber length and fiber content is established according 
      to the test results. The results show that the peak strength of aeolian sand 
      solidified by MICP-BFR is remarkably higher than that of aeolian sand solidified 
      by MICP alone, and the peak strength rises with the increasing fiber length, 
      fiber content, and confining pressure. The application of fiber can effectively 
      reduce the brittleness index of aeolian sand solidified by MICP and improve the 
      sample ductility. As fiber content and fiber length increase, the cohesion of 
      solidified aeolian sand increases while the internal friction angle changes 
      relatively little. In the limited range set by the test, the fiber length of 12 
      mm and the fiber content of 1.0% constitute the optimum reinforcement condition. 
      The test results coincide with the model prediction results, indicating that the 
      new model is fitting for predicting the shear strength of aeolian sand solidified 
      by MICP-BFR. The research results provide an important reference value for 
      guiding the practice of wind prevention and sand fixation in desert areas.
FAU - Li, Gang
AU  - Li G
AD  - Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing 
      University, Xi'an 710123, China.
FAU - Liu, Jia
AU  - Liu J
AUID- ORCID: 0000-0002-2392-6629
AD  - School of Geological Engineering and Geomatics, Chang'an University, Xi'an 
      710054, China.
FAU - Zhang, Jinli
AU  - Zhang J
AUID- ORCID: 0000-0002-6188-9750
AD  - State Key Laboratory of Coastal and Offshore Engineering, Dalian University of 
      Technology, Dalian 116024, China.
FAU - Yang, Yiran
AU  - Yang Y
AD  - Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing 
      University, Xi'an 710123, China.
FAU - Chen, Shufeng
AU  - Chen S
AUID- ORCID: 0000-0002-5007-2550
AD  - Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing 
      University, Xi'an 710123, China.
LA  - eng
GR  - 2021JM-535/Natural Science Basic Research Program of Shaanxi Province/
GR  - XJ18T01/Special Fund for Scientific Research by Xijing University/
PT  - Journal Article
DEP - 20230826
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC10488342
OTO - NOTNLM
OT  - MICP
OT  - aeolian sand
OT  - basalt fiber
OT  - peak strength
OT  - shear strength
COIS- The authors declare no conflict of interest.
EDAT- 2023/09/09 11:45
MHDA- 2023/09/09 11:46
PMCR- 2023/08/26
CRDT- 2023/09/09 01:20
PHST- 2023/07/14 00:00 [received]
PHST- 2023/08/13 00:00 [revised]
PHST- 2023/08/24 00:00 [accepted]
PHST- 2023/09/09 11:46 [medline]
PHST- 2023/09/09 11:45 [pubmed]
PHST- 2023/09/09 01:20 [entrez]
PHST- 2023/08/26 00:00 [pmc-release]
AID - ma16175857 [pii]
AID - materials-16-05857 [pii]
AID - 10.3390/ma16175857 [doi]
PST - epublish
SO  - Materials (Basel). 2023 Aug 26;16(17):5857. doi: 10.3390/ma16175857.