PMID- 35683315
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230308
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 15
IP  - 11
DP  - 2022 Jun 6
TI  - Influence of Fiber Type and Length on Mechanical Properties of MICP-Treated Sand.
LID - 10.3390/ma15114017 [doi]
LID - 4017
AB  - Fibers are applied in construction work to improve the strength and avoid brittle 
      failure of soil. In this paper, we analyze the impact mechanism of fiber type and 
      length on the immobilization of microorganisms from macroscopic and microscopic 
      perspectives with fibers of 0.2% volume fraction added to microbial-induced 
      calcite precipitation (MICP)-treated sand. Results show the following: (1) The 
      unconfined compressive strength (UCS) of MICP-treated sand first increases and 
      then decreases with increasing fiber length because short fiber reinforcement can 
      promote the precipitation of calcium carbonate, and the network formed between 
      the fibers limits the movement of sand particles and enhances the strength of the 
      microbial solidified sand. However, the agglomeration caused by overlong fibers 
      leads to uneven distribution of calcium carbonate and a reduction in strength. 
      The optimal fiber length of polypropylene, glass, and polyvinyl alcohol fiber is 
      9 mm, and that of basalt fiber is 12 mm. (2) The UCS of the different fiber 
      types, from small to large, is basalt fiber < polypropylene fiber < glass fiber < 
      polyvinyl alcohol fiber because the quality of the fiber monofilament differs. 
      More fibers result in more a evident effect of interlacing and bending on sand 
      and higher strength in consolidated sand.
FAU - Liang, Shihua
AU  - Liang S
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
FAU - Xiao, Xueli
AU  - Xiao X
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
FAU - Wang, Jie
AU  - Wang J
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
FAU - Wang, Yuxing
AU  - Wang Y
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
FAU - Feng, Deluan
AU  - Feng D
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
FAU - Zhu, Chengyuan
AU  - Zhu C
AD  - School of Civil and Transportation Engineering, Guangdong University of 
      Technology, Guangzhou 510006, China.
LA  - eng
GR  - 52078142/National Natural Science Foundation of China/
GR  - 202002030194/The Science and Technology Program of Guangzhou/
PT  - Journal Article
DEP - 20220606
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC9181970
OTO - NOTNLM
OT  - MICP
OT  - SEM
OT  - length of fibers
OT  - mechanical properties
OT  - type of fibers
COIS- The authors declare no conflict of interest.
EDAT- 2022/06/11 06:00
MHDA- 2022/06/11 06:01
PMCR- 2022/06/06
CRDT- 2022/06/10 01:18
PHST- 2022/03/30 00:00 [received]
PHST- 2022/05/19 00:00 [revised]
PHST- 2022/05/30 00:00 [accepted]
PHST- 2022/06/10 01:18 [entrez]
PHST- 2022/06/11 06:00 [pubmed]
PHST- 2022/06/11 06:01 [medline]
PHST- 2022/06/06 00:00 [pmc-release]
AID - ma15114017 [pii]
AID - materials-15-04017 [pii]
AID - 10.3390/ma15114017 [doi]
PST - epublish
SO  - Materials (Basel). 2022 Jun 6;15(11):4017. doi: 10.3390/ma15114017.