PMID- 37176458
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230515
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 9
DP  - 2023 May 7
TI  - Experimental Investigation on the Influence of Crack Width of Asphalt Concrete on 
      the Repair Effect of Microbially Induced Calcite Precipitation.
LID - 10.3390/ma16093576 [doi]
LID - 3576
AB  - The appearance of cracks is one of the reasons that affect the performance of 
      asphalt pavement, and traditional repair methods have the potential problem of 
      causing adverse effects on the environment. In this paper, an environmentally 
      friendly method for asphalt concrete crack repair was investigated using 
      microbially induced calcite precipitation (MICP) for asphalt concrete cracks of 
      different widths (0.5 mm, 1.0 mm, 1.5 mm, and 3 mm), and the effectiveness of 
      repair was evaluated using nondestructive and destructive experiments. A varied 
      ultrasonic pulse velocity was used to evaluate the healing process, and it was 
      found that the samples with an initial crack width of 0.5 mm showed the most 
      significant increase in wave velocity of 18.06% after repair. The results also 
      showed that the uniaxial compressive strength and indirect tensile strength of 
      the MICP-repaired samples recovered up to 47.02% and 34.68%. Static creep test 
      results showed that MICP-repaired samples with smaller width cracks had greater 
      resistance to permanent deformation. The results of uniaxial compressive strength 
      tests on larger width (3 mm) cracks repaired by MICP combined with fibers showed 
      that the strength of the samples was significantly increased by the addition of 
      fibers. In addition, the SEM/EDS results showed that the MICP products were 
      spherical calcite particles with a particle size distribution from 0 to 10 mum. 
      This study shows that MICP has some potential for repairing cracks in asphalt 
      concrete of different widths within the range investigated.
FAU - Fan, Ling
AU  - Fan L
AD  - School of Resources and Safety Engineering, Central South University, Changsha 
      410083, China.
FAU - Zheng, Jinghong
AU  - Zheng J
AD  - School of Resources and Safety Engineering, Central South University, Changsha 
      410083, China.
FAU - Peng, Shuquan
AU  - Peng S
AUID- ORCID: 0000-0002-6702-1004
AD  - School of Resources and Safety Engineering, Central South University, Changsha 
      410083, China.
FAU - Xun, Zhize
AU  - Xun Z
AD  - School of Resources and Safety Engineering, Central South University, Changsha 
      410083, China.
FAU - Chen, Guoliang
AU  - Chen G
AD  - School of Resources and Safety Engineering, Central South University, Changsha 
      410083, China.
LA  - eng
GR  - 52174100/National Natural Science Foundation of China/
GR  - 51674287/National Natural Science Foundation of China/
GR  - 2021JJ30834/National Science Foundation of Hunan Province, China/
PT  - Journal Article
DEP - 20230507
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC10179775
OTO - NOTNLM
OT  - asphalt concrete
OT  - cracks
OT  - fibers
OT  - microbially induced calcite precipitation
OT  - spherical calcite
OT  - uniaxial compressive strength
COIS- The authors declare no conflict of interest.
EDAT- 2023/05/13 15:13
MHDA- 2023/05/13 15:14
PMCR- 2023/05/07
CRDT- 2023/05/13 01:33
PHST- 2023/04/09 00:00 [received]
PHST- 2023/04/29 00:00 [revised]
PHST- 2023/05/05 00:00 [accepted]
PHST- 2023/05/13 15:14 [medline]
PHST- 2023/05/13 15:13 [pubmed]
PHST- 2023/05/13 01:33 [entrez]
PHST- 2023/05/07 00:00 [pmc-release]
AID - ma16093576 [pii]
AID - materials-16-03576 [pii]
AID - 10.3390/ma16093576 [doi]
PST - epublish
SO  - Materials (Basel). 2023 May 7;16(9):3576. doi: 10.3390/ma16093576.