PMID- 34528205
OWN - NLM
STAT- MEDLINE
DCOM- 20220131
LR  - 20220131
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 29
IP  - 8
DP  - 2022 Feb
TI  - Bio-cement-modified construction materials and their performances.
PG  - 11219-11231
LID - 10.1007/s11356-021-16401-0 [doi]
AB  - The microbial induced mineral precipitation can be used to modify and improve the 
      performance of construction materials and can partially replace ordinary Portland 
      cement. Microbially induced carbonate precipitation (MICP) mainly uses the urease 
      secreted during the growth of urease-producing bacteria (UPB) to hydrolyze urea 
      produce CO(3)(2-) and reacts with Ca(2+) to form CaCO(3). Microbially induced 
      struvite precipitation (MISP) mainly uses the urease to decompose urea to produce 
      NH(4)(+). In the presence of hydrogen phosphate and magnesium ions, the struvite 
      can be precipitated. The elemental composition and chemical composition of the 
      precipitates produced by the MICP and MISP processes are analyzed by energy 
      dispersive X-ray spectroscopy (EDS) and powder X-ray diffraction analysis (XRD). 
      The morphology of the precipitates can be observed by scanning electron 
      microscope (SEM). Compared with the initial porosity, the MICP method can reduce 
      the initial porosity of the sand column by 2.98% within 90 min. However, the MISP 
      is only 1.45%. The permeability coefficient of the sand column can be effectively 
      reduced in the MICP process. The total content of cementitious materials is 
      27.71g and 13.16g in MICP- and MISP-cemented sand columns, respectively. The MICP 
      technology can improve the strength of alkali-activated mortars under different 
      pH values of the UPB solution.
CI  - (c) 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, 
      part of Springer Nature.
FAU - Yu, Xiaoniu
AU  - Yu X
AD  - Jiangsu Key Laboratory of Construction Materials, Nanjing, 211189, China.
AD  - College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, 
      325035, China.
FAU - He, Zhihai
AU  - He Z
AD  - College of Civil Engineering, Shaoxing University, Shaoxing, 312000, China. 
      zhihaihe1981@126.com.
AD  - Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing, 
      312000, China. zhihaihe1981@126.com.
FAU - Li, Xianyan
AU  - Li X
AD  - Yunnan Traffic Group Investment Co., Ltd., Kunming, 650000, China.
LA  - eng
GR  - CM2018-02/jiangsu key laboratory of construction materials/
PT  - Journal Article
DEP - 20210916
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Carbonates)
RN  - 0 (Sand)
RN  - EC 3.5.1.5 (Urease)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - *Calcium Carbonate
MH  - Carbonates
MH  - Chemical Precipitation
MH  - *Construction Materials
MH  - Sand
MH  - Urease
OTO - NOTNLM
OT  - Alkali-activated mortar
OT  - MICP
OT  - MISP
OT  - Sand column
OT  - Strength
EDAT- 2021/09/17 06:00
MHDA- 2022/02/01 06:00
CRDT- 2021/09/16 07:30
PHST- 2021/06/14 00:00 [received]
PHST- 2021/09/03 00:00 [accepted]
PHST- 2021/09/17 06:00 [pubmed]
PHST- 2022/02/01 06:00 [medline]
PHST- 2021/09/16 07:30 [entrez]
AID - 10.1007/s11356-021-16401-0 [pii]
AID - 10.1007/s11356-021-16401-0 [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2022 Feb;29(8):11219-11231. doi: 
      10.1007/s11356-021-16401-0. Epub 2021 Sep 16.