Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores
The purpose of this research work was to evaluate the efficacy of microbially induced calcite precipitation (MICP) method in shrinkage crack repairing. Portland cement was combined with sand, bacterial spores, water, and nutrients to prepare self-healing composites. The microencapsulated bacterial s...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423002429 |
| _version_ | 1797858786188197888 |
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| author | Peem Nuaklong Pitcha Jongvivatsakul Vanalee Phanupornprapong Jirapa Intarasoontron Hafsa Shahzadi Wiboonluk Pungrasmi Sineenat Thaiboonrod Suched Likitlersuang |
| author_facet | Peem Nuaklong Pitcha Jongvivatsakul Vanalee Phanupornprapong Jirapa Intarasoontron Hafsa Shahzadi Wiboonluk Pungrasmi Sineenat Thaiboonrod Suched Likitlersuang |
| author_sort | Peem Nuaklong |
| collection | DOAJ |
| description | The purpose of this research work was to evaluate the efficacy of microbially induced calcite precipitation (MICP) method in shrinkage crack repairing. Portland cement was combined with sand, bacterial spores, water, and nutrients to prepare self-healing composites. The microencapsulated bacterial spores were employed as an additive substance at ratios of 0%, 0.5%, and 1% by weight of cement. Specimens were kept in a climate-controlled room after casting to induce shrinkage crack. Crystalline phases formed in the specimen were identified using the X-ray diffraction (XRD) technique. The scanning electron microscopy/energy dispersive X-ray spectrometry (SEM/EDS) method was used to investigate the morphology of precipitated calcite (CaCO3) crystals. Additionally, the specimen's permeability and compressive strength were also determined. When the bacterial spores were added to produce MICP procedure, the results demonstrated that it was successful in healing the shrinkage cracking. Within three days, the specimen with 1% spores could completely seal the shrinkage crack. According to the XRD patterns, the CaCO3 crystals appeared to promote the production of the calcite phase. Based on SEM/EDS investigation, the MICP process leads to concentrations of calcite crystal in certain regions, especially at the top surface of the crack. The 28-day compressive strength, on the other hand, decreased, owing to the addition of nutrients. |
| first_indexed | 2024-04-09T21:20:03Z |
| format | Article |
| id | doaj.art-f488fa21027d4d2e9d0367264cda885b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:20:03Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-f488fa21027d4d2e9d0367264cda885b2023-03-28T06:47:24ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012334413454Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial sporesPeem Nuaklong0Pitcha Jongvivatsakul1Vanalee Phanupornprapong2Jirapa Intarasoontron3Hafsa Shahzadi4Wiboonluk Pungrasmi5Sineenat Thaiboonrod6Suched Likitlersuang7Department of Civil Engineering, Thammasat School of Engineering, Faculty of Engineering, Thammasat University, Pathumthani, 12120, ThailandCenter of Excellence in Innovative Construction Materials, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Corresponding author.Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330 ThailandDepartment of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, ThailandCenter of Excellence in Innovative Construction Materials, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, 54000, PakistanDepartment of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, ThailandNational Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, 12120, ThailandCentre of Excellence in Geotechnical and Geoenvironmental Engineering, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, ThailandThe purpose of this research work was to evaluate the efficacy of microbially induced calcite precipitation (MICP) method in shrinkage crack repairing. Portland cement was combined with sand, bacterial spores, water, and nutrients to prepare self-healing composites. The microencapsulated bacterial spores were employed as an additive substance at ratios of 0%, 0.5%, and 1% by weight of cement. Specimens were kept in a climate-controlled room after casting to induce shrinkage crack. Crystalline phases formed in the specimen were identified using the X-ray diffraction (XRD) technique. The scanning electron microscopy/energy dispersive X-ray spectrometry (SEM/EDS) method was used to investigate the morphology of precipitated calcite (CaCO3) crystals. Additionally, the specimen's permeability and compressive strength were also determined. When the bacterial spores were added to produce MICP procedure, the results demonstrated that it was successful in healing the shrinkage cracking. Within three days, the specimen with 1% spores could completely seal the shrinkage crack. According to the XRD patterns, the CaCO3 crystals appeared to promote the production of the calcite phase. Based on SEM/EDS investigation, the MICP process leads to concentrations of calcite crystal in certain regions, especially at the top surface of the crack. The 28-day compressive strength, on the other hand, decreased, owing to the addition of nutrients.http://www.sciencedirect.com/science/article/pii/S2238785423002429Microbially induced calcite precipitationMicroencapsulated bacterial sporeCrack closingSelf-healing concrete |
| spellingShingle | Peem Nuaklong Pitcha Jongvivatsakul Vanalee Phanupornprapong Jirapa Intarasoontron Hafsa Shahzadi Wiboonluk Pungrasmi Sineenat Thaiboonrod Suched Likitlersuang Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores Journal of Materials Research and Technology Microbially induced calcite precipitation Microencapsulated bacterial spore Crack closing Self-healing concrete |
| title | Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| title_full | Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| title_fullStr | Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| title_full_unstemmed | Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| title_short | Self-repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| title_sort | self repairing of shrinkage crack in mortar containing microencapsulated bacterial spores |
| topic | Microbially induced calcite precipitation Microencapsulated bacterial spore Crack closing Self-healing concrete |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423002429 |
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