PVA increases efficiency of bacterially-induced self-healing in cement mortars

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00358434" target="_blank" >RIV/68407700:21110/22:00358434 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21720/22:00358434 RIV/00064165:_____/22:10448716 RIV/00216208:11110/22:10448716
Result on the web
<a href="https://doi.org/10.1016/j.cemconcomp.2022.104593" target="_blank" >https://doi.org/10.1016/j.cemconcomp.2022.104593</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cemconcomp.2022.104593" target="_blank" >10.1016/j.cemconcomp.2022.104593</a>

Result language
angličtina
Original language name
PVA increases efficiency of bacterially-induced self-healing in cement mortars
Original language description
Different strains of bacteria capable of calcite precipitation can be incorporated into fresh concrete or cement mortars to efficiently promote self-healing of microcracks after hardening. To date, all bacterial strains investigated have required protection against the highly alkaline environments and high pressures in cementitious matrices. The core objective of this study was to eliminate the inconveniences related to protecting (typically encapsulating) bacteria. Poly(vinyl alcohol) (PVA) doped with spores of Bacillus pseudofirmus and nutrients were added to mixing water when cementitious mortars were prepared. The hardened mortar specimens were cracked and studied using microscopy, resonance measurements, X-ray microtomography (μ-CT), and destructive mechanical tests to assess the rate and efficiency of the healing processes. PVA was efficient in promoting remediation in all mortar specimens, both with and without bacteria. Specimens containing PVA plus bacteria showed the most efficient self-repair processes, while autogenous remediation in reference samples lacking PVA or bacteria were least efficient in healing microcracks.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
<a href="/en/project/GA18-15697S" target="_blank" >GA18-15697S: Self-healing of cementitious composites by bacteria-induced calcification</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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