Biomineralization in self-healing cement-based materials: investigating the temporal evolution of microbial metabolic state and material porosity

Name: Biomineralization in self-healing cement-based materials: investigating the temporal evolution of microbial metabolic state and material porosity
Author: Bundur, Zeynep Başaran, Bae, S., Kirisits, M. J., Douglas Ferron, R.

İsim	Biomineralization in self-healing cement-based materials: investigating the temporal evolution of microbial metabolic state and material porosity
Yazar	Bundur, Zeynep Başaran, Bae, S., Kirisits, M. J., Douglas Ferron, R.
Basım Tarihi:	2017
Basım Yeri	- American Society of Civil Engineers
Konu	Carbonation, Biomineralization, Cement paste, Mortar, Self-healing, Sporosarcina pasteurii
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1943-5533
Kayıt Numarası	68a02d48-f0e1-4fca-a15f-bcce5d6feac6
Lokasyon	Civil Engineering
Tarih	2017
Örnek Metin	The potential for self-healing of concrete via biomineralization processes in which microorganisms influence mineral precipitation is promising. To embed microorganisms within a cement-based material, key challenges are to find a microorganism that can tolerate the highly alkaline conditions, survive the mixing process, and remain viable with limited access to nutrients. The focus of this work is to determine the metabolic state of unencapsulated Sporosarcina pasteurii, inoculated vegetatively, in a cement-based matrix over time and to examine its ability to remediate internal cracks and reduce porosity. Viable S. pasteurii was found in hardened mortar samples that were as old as 330 days, and 48% of the viable cells detected were vegetative. A greater fraction of the inoculated cells remained viable in mortar as compared to cement paste, which is promising because mortar is a better representation of the composite nature of concrete than cement paste. Furthermore, as compared to neat paste and neat mortar, addition of the vegetative cell culture to bacterial paste and bacterial mortar resulted in reduced porosity. Bacterial mortar also demonstrated increased strength recovery as compared to neat mortar. The reduction in porosity and increase in mechanical regains demonstrated by the bacterial mortar suggest improved durability and service life for bioconcrete as compared to traditional concrete.
Cilt	29

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Biomineralization in self-healing cement-based materials: investigating the temporal evolution of microbial metabolic state and material porosity

Yazar Bundur, Zeynep Başaran, Bae, S., Kirisits, M. J., Douglas Ferron, R.

Basım Tarihi 2017

Basım Yeri - American Society of Civil Engineers

Konu Carbonation, Biomineralization, Cement paste, Mortar, Self-healing, Sporosarcina pasteurii

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1943-5533

Kayıt Numarası 68a02d48-f0e1-4fca-a15f-bcce5d6feac6

Lokasyon Civil Engineering

Tarih 2017

Örnek Metin The potential for self-healing of concrete via biomineralization processes in which microorganisms influence mineral precipitation is promising. To embed microorganisms within a cement-based material, key challenges are to find a microorganism that can tolerate the highly alkaline conditions, survive the mixing process, and remain viable with limited access to nutrients. The focus of this work is to determine the metabolic state of unencapsulated Sporosarcina pasteurii, inoculated vegetatively, in a cement-based matrix over time and to examine its ability to remediate internal cracks and reduce porosity. Viable S. pasteurii was found in hardened mortar samples that were as old as 330 days, and 48% of the viable cells detected were vegetative. A greater fraction of the inoculated cells remained viable in mortar as compared to cement paste, which is promising because mortar is a better representation of the composite nature of concrete than cement paste. Furthermore, as compared to neat paste and neat mortar, addition of the vegetative cell culture to bacterial paste and bacterial mortar resulted in reduced porosity. Bacterial mortar also demonstrated increased strength recovery as compared to neat mortar. The reduction in porosity and increase in mechanical regains demonstrated by the bacterial mortar suggest improved durability and service life for bioconcrete as compared to traditional concrete.

Cilt 29