PMID- 33430360
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210126
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 14
IP  - 2
DP  - 2021 Jan 7
TI  - Effects of Different Types of Fibers on the Physical and Mechanical Properties of 
      MICP-Treated Calcareous Sand.
LID - 10.3390/ma14020268 [doi]
LID - 268
AB  - Microbial-induced calcite precipitation (MICP) has been a promising method to 
      improve geotechnical engineering properties through the precipitation of calcium 
      carbonate (CaCO(3)) on the contact and surface of soil particles in recent years. 
      In the present experiment, water absorption and unconfined compressive strength 
      (UCS) tests were carried out to investigate the effects of three different fiber 
      types (glass fiber, polyester fiber, and hemp fiber) on the physical and 
      mechanical properties of MICP-treated calcareous sand. The fibers used were at 
      0%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%, and 0.40% relative to the weight of 
      the sand. The results showed that the failure strain and ductility of the samples 
      could be improved by adding fibers. Compared to biocemented sand (BS), the water 
      absorption of these three fiber-reinforced biocemented sands were, respectively, 
      decreased by 11.60%, 21.18%, and 7.29%. UCS was, respectively, increased by 
      24.20%, 60.76%, and 6.40%. Polyester fiber produced the best effect, followed by 
      glass fiber and hemp fiber. The optimum contents of glass fiber and polyester 
      fiber were 0.20% and 0.25%, respectively. The optimum content of hemp fiber was 
      within the range of 0.20-0.25%. Light-emitting diode (LED) microscope and 
      scanning electron microscope (SEM) images lead to the conclusion that only a 
      little calcite precipitation had occurred around the hemp fiber, leading to a 
      poor bonding effect compared to the glass and polyester fibers. It was therefore 
      suggested that polyester fiber should be used to improve the properties of 
      biocemented sand.
FAU - Zhao, Jitong
AU  - Zhao J
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Tong, Huawei
AU  - Tong H
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Shan, Yi
AU  - Shan Y
AUID- ORCID: 0000-0002-6513-1189
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Yuan, Jie
AU  - Yuan J
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Peng, Qiuwang
AU  - Peng Q
AD  - Foshan Railway Investment Construction Group Co., Ltd., Foshan 528000, China.
FAU - Liang, Junling
AU  - Liang J
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
LA  - eng
GR  - 51908151/National Natural Science Foundation of China/
GR  - 52008121/National Natural Science Foundation of China/
GR  - 2020M682652/Chinese Postdoctoral Science Foundation/
GR  - 201804010250/Guangzhou Science and Technology Program key projects/
GR  - 2019GDJC-M31/Guangzhou University Postgraduate Innovation Ability Training 
      Funding Program/
PT  - Journal Article
DEP - 20210107
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC7825789
OTO - NOTNLM
OT  - bonding effect
OT  - glass, polyester, and hemp fibers
OT  - microbial-induced calcite precipitation (MICP)
OT  - unconfined compressive strength (UCS)
OT  - water absorption
COIS- The authors declare no conflict of interest.
EDAT- 2021/01/13 06:00
MHDA- 2021/01/13 06:01
PMCR- 2021/01/07
CRDT- 2021/01/12 01:16
PHST- 2020/11/16 00:00 [received]
PHST- 2021/01/02 00:00 [revised]
PHST- 2021/01/04 00:00 [accepted]
PHST- 2021/01/12 01:16 [entrez]
PHST- 2021/01/13 06:00 [pubmed]
PHST- 2021/01/13 06:01 [medline]
PHST- 2021/01/07 00:00 [pmc-release]
AID - ma14020268 [pii]
AID - materials-14-00268 [pii]
AID - 10.3390/ma14020268 [doi]
PST - epublish
SO  - Materials (Basel). 2021 Jan 7;14(2):268. doi: 10.3390/ma14020268.