Crack remediation in mortar via biomineralization: effects of chemical admixtures on biogenic calcium carbonate

Name: Crack remediation in mortar via biomineralization: effects of chemical admixtures on biogenic calcium carbonate
Author: Amiri, Ali, Azima, Mahzad, Bundur, Zeynep Başaran

İsim	Crack remediation in mortar via biomineralization: effects of chemical admixtures on biogenic calcium carbonate
Yazar	Amiri, Ali, Azima, Mahzad, Bundur, Zeynep Başaran
Basım Tarihi:	2018-11-30
Basım Yeri	- Elsevier
Konu	Mortar, Calcium carbonate, Admixture, Microcracking, Biomineralization, Water absorption
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0950-0618
Kayıt Numarası	dbfcf9af-8dd2-4a5b-bda1-ed54d9df5002
Lokasyon	Civil Engineering
Tarih	2018-11-30
Notlar	TÜBİTAK
Örnek Metin	Limited research on biomineralization in cement-based systems suggested that self-healing of surface cracks could be obtained by triggering biogenic calcium carbonate (CaCO3) precipitation within the cracks. While this is encouraging, there is not enough information regarding the influence of admixtures on crack remediation and durability of the biogenic CaCO3 against weathering conditions. In this study, the microorganisms were introduced to mortar with their growth medium, which included corn steep liquor (CSL) and urea. With this approach, the cracks on mortar surface were sealed with the CaCO3 and the water absorption capacity of the so-called self-healed mortar decreased compared to its counterpart cracked mortar samples. The biogenic CaCO3 precipitate was found to be durable against freeze-thaw; however the precipitate was unstable under rain water and light. While the addition of air entraining agents (AEA) did not influence the self-healing ability of cells, use of superplasticizers improved the self-healing ability in terms of crack sealing, water absorption, and durability of the precipitate.
DOI	10.1016/j.conbuildmat.2018.09.083
Cilt	190

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Crack remediation in mortar via biomineralization: effects of chemical admixtures on biogenic calcium carbonate

Yazar Amiri, Ali, Azima, Mahzad, Bundur, Zeynep Başaran

Basım Tarihi 2018-11-30

Basım Yeri - Elsevier

Konu Mortar, Calcium carbonate, Admixture, Microcracking, Biomineralization, Water absorption

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0950-0618

Kayıt Numarası dbfcf9af-8dd2-4a5b-bda1-ed54d9df5002

Lokasyon Civil Engineering

Tarih 2018-11-30

Notlar TÜBİTAK

Örnek Metin Limited research on biomineralization in cement-based systems suggested that self-healing of surface cracks could be obtained by triggering biogenic calcium carbonate (CaCO3) precipitation within the cracks. While this is encouraging, there is not enough information regarding the influence of admixtures on crack remediation and durability of the biogenic CaCO3 against weathering conditions. In this study, the microorganisms were introduced to mortar with their growth medium, which included corn steep liquor (CSL) and urea. With this approach, the cracks on mortar surface were sealed with the CaCO3 and the water absorption capacity of the so-called self-healed mortar decreased compared to its counterpart cracked mortar samples. The biogenic CaCO3 precipitate was found to be durable against freeze-thaw; however the precipitate was unstable under rain water and light. While the addition of air entraining agents (AEA) did not influence the self-healing ability of cells, use of superplasticizers improved the self-healing ability in terms of crack sealing, water absorption, and durability of the precipitate.

DOI 10.1016/j.conbuildmat.2018.09.083

Cilt 190