Evaluation of Cyclic Healing Potential of Bacteria-Based Self-Healing Cementitious Composites

Publication type:
Journal article
Metadata:
Autoren
  • Ismael Justo-Reinoso
  • Bianca J Reeksting
  • Andrew Heath
  • Susanne Gebhard
  • Kevin Paine
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000809077200001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.3390/su14116845
eISSN
2071-1050
Externe Identifier
  • Clarivate Analytics Document Solution ID: 1Z8OS
Ausgabe der Veröffentlichung
11
Zeitschrift
SUSTAINABILITY
Schlüsselwörter
  • bacteria
  • biomineralization
  • cyclic healing
  • later age
  • MICP
  • re-healing
  • self-healing concrete
Artikelnummer
ARTN 6845
Datum der Veröffentlichung
2022
Status
Published
Titel
Evaluation of Cyclic Healing Potential of Bacteria-Based Self-Healing Cementitious Composites
Sub types
  • Article
Ausgabe der Zeitschrift
14

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>At present, little evidence exists regarding the capability of bacteria-based self-healing (BBSH) cementitious materials to successfully re-heal previously healed cracks. This paper investigates the repeatability of the self-healing of BBSH mortars when the initially healed crack is reopened at a later age (20 months) and the potential of encapsulated bacterial spores to heal a new crack generated at 22 months after casting. The results show that BBSH cement mortar cracks that were successfully healed at an early age were not able to successfully re-heal when cracks were reformed in the same location 20 months later, even when exposed to favourable conditions (i.e., high humidity, temperature, calcium source, and nutrients) to promote their re-healing. Therefore, it is likely that not enough bacterial spores were available within the initially healed crack to successfully start a new self-healing cycle. However, when entirely new cracks were intentionally generated at a different position in 22-month-old mortars, these new cracks were able to achieve an average healing ratio and water tightness of 93.3% and 90.8%, respectively, thus demonstrating that the encapsulated bacterial spores remained viable inside the cementitious matrix. The results reported in this paper provide important insights into the appropriate design of practical self-healing concrete and, for the first time, show limitations of the ability of BBSH concrete to re-heal.</jats:p>
Autoren
  • Ismael Justo-Reinoso
  • Bianca J Reeksting
  • Andrew Heath
  • Susanne Gebhard
  • Kevin Paine
DOI
10.3390/su14116845
eISSN
2071-1050
Ausgabe der Veröffentlichung
11
Zeitschrift
Sustainability
Sprache
en
Online publication date
2022
Paginierung
6845 - 6845
Status
Published online
Herausgeber
MDPI AG
Herausgeber URL
http://dx.doi.org/10.3390/su14116845
Datum der Datenerfassung
2022
Titel
Evaluation of Cyclic Healing Potential of Bacteria-Based Self-Healing Cementitious Composites
Ausgabe der Zeitschrift
14

Data source: Crossref

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