Efficacy of iron-based bioproducts as surface biotreatment for earth-based plastering mortars

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2 Citations (Scopus)

Abstract

The use of bacteria for the enhancement of construction materials has been a focus of study in the past few years. Microbial cells have been applied to consolidate the surface of different materials. Earthen plasters are eco-efficient building products that can be applied on new buildings but also used to protect cultural heritage structures, with several advantages. They are based on abundant, affordable and easy to obtain materials, but are vulnerable to water. New eco-efficient bioproducts were developed based on E. coli cultures supplemented with iron, that can be obtained as an industrial by-product. They were applied in laboratory on an earth plaster surface and the biotreatment efficacy was assessed. The main objective was to improve the durability of the plastering mortar when exposed to water. An optimized E. coli-iron based surface biotreatment strongly increased the plaster resistance to water with the application of only 0.0625 mL/cm2 of E. coli++Fe leading to a significant increase of water absorption time in comparison with similar plasters where the same amount of water was applied. Moreover, all biotreatments produced an increase of resistance to water absorption creating a slight waterproofing effect, ensuring compatibility. Their loss of efficacy with time guarantees reversibility of the intervention. The results show the interest to perform an in-depth study on the microstructure of biotreated earth mortars to understand the biotreatment effect.

Original languageEnglish
Article number117803
JournalJournal of Cleaner Production
Volume237
DOIs
Publication statusPublished - 10 Nov 2019

Fingerprint

Plaster
mortar
Mortar
Earth (planet)
Escherichia coli
Iron
iron
Water absorption
Water
Waterproofing
water
waterproofing
Byproducts
Bacteria
Durability
cultural heritage
durability
Microstructure
Efficacy
microstructure

Keywords

  • Bioconsolidation
  • Biomineralization
  • Compatibility
  • Eco-efficiency
  • Protection
  • Reversibility

Cite this

@article{e5a732870b104a85a009641bdbd34edd,
title = "Efficacy of iron-based bioproducts as surface biotreatment for earth-based plastering mortars",
abstract = "The use of bacteria for the enhancement of construction materials has been a focus of study in the past few years. Microbial cells have been applied to consolidate the surface of different materials. Earthen plasters are eco-efficient building products that can be applied on new buildings but also used to protect cultural heritage structures, with several advantages. They are based on abundant, affordable and easy to obtain materials, but are vulnerable to water. New eco-efficient bioproducts were developed based on E. coli cultures supplemented with iron, that can be obtained as an industrial by-product. They were applied in laboratory on an earth plaster surface and the biotreatment efficacy was assessed. The main objective was to improve the durability of the plastering mortar when exposed to water. An optimized E. coli-iron based surface biotreatment strongly increased the plaster resistance to water with the application of only 0.0625 mL/cm2 of E. coli++Fe leading to a significant increase of water absorption time in comparison with similar plasters where the same amount of water was applied. Moreover, all biotreatments produced an increase of resistance to water absorption creating a slight waterproofing effect, ensuring compatibility. Their loss of efficacy with time guarantees reversibility of the intervention. The results show the interest to perform an in-depth study on the microstructure of biotreated earth mortars to understand the biotreatment effect.",
keywords = "Bioconsolidation, Biomineralization, Compatibility, Eco-efficiency, Protection, Reversibility",
author = "Parracha, {Jo{\~a}o Lu{\'i}s} and Pereira, {Alice S.} and {Velez da Silva}, Ricardo and N{\'i}dia Almeida and Paulina Faria",
note = "The authors acknowledge the support of the Funda{\cc}{\~a}o para a Ci{\^e}ncia e Tecnologia (FCT) through research project PTDC/EPH-PAT/4684/2014 : DB-Heritage, Database of building materials with historical and heritage interest. Part of this work was supported by the Applied Molecular Biosciences Unit-UCIBIO which is financed by national funds from FCT / MCTES (UID/Multi/04378/2019). N{\'i}dia Almeida is supported by the Radiation Biology and Biophysics Doctoral Training Programme ( RaBBiT-PD/00193/2012 ; UCIBIO-UID/Multi/04378/2019 and CEFETIC-UID/FIS/00068/2013 ) and by a PhD fellowship from FCT/MCTES (PD/BD/106034/2015).",
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doi = "10.1016/j.jclepro.2019.117803",
language = "English",
volume = "237",
journal = "Journal of Cleaner Production",
issn = "0959-6526",
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TY - JOUR

T1 - Efficacy of iron-based bioproducts as surface biotreatment for earth-based plastering mortars

AU - Parracha, João Luís

AU - Pereira, Alice S.

AU - Velez da Silva, Ricardo

AU - Almeida, Nídia

AU - Faria, Paulina

N1 - The authors acknowledge the support of the Fundação para a Ciência e Tecnologia (FCT) through research project PTDC/EPH-PAT/4684/2014 : DB-Heritage, Database of building materials with historical and heritage interest. Part of this work was supported by the Applied Molecular Biosciences Unit-UCIBIO which is financed by national funds from FCT / MCTES (UID/Multi/04378/2019). Nídia Almeida is supported by the Radiation Biology and Biophysics Doctoral Training Programme ( RaBBiT-PD/00193/2012 ; UCIBIO-UID/Multi/04378/2019 and CEFETIC-UID/FIS/00068/2013 ) and by a PhD fellowship from FCT/MCTES (PD/BD/106034/2015).

PY - 2019/11/10

Y1 - 2019/11/10

N2 - The use of bacteria for the enhancement of construction materials has been a focus of study in the past few years. Microbial cells have been applied to consolidate the surface of different materials. Earthen plasters are eco-efficient building products that can be applied on new buildings but also used to protect cultural heritage structures, with several advantages. They are based on abundant, affordable and easy to obtain materials, but are vulnerable to water. New eco-efficient bioproducts were developed based on E. coli cultures supplemented with iron, that can be obtained as an industrial by-product. They were applied in laboratory on an earth plaster surface and the biotreatment efficacy was assessed. The main objective was to improve the durability of the plastering mortar when exposed to water. An optimized E. coli-iron based surface biotreatment strongly increased the plaster resistance to water with the application of only 0.0625 mL/cm2 of E. coli++Fe leading to a significant increase of water absorption time in comparison with similar plasters where the same amount of water was applied. Moreover, all biotreatments produced an increase of resistance to water absorption creating a slight waterproofing effect, ensuring compatibility. Their loss of efficacy with time guarantees reversibility of the intervention. The results show the interest to perform an in-depth study on the microstructure of biotreated earth mortars to understand the biotreatment effect.

AB - The use of bacteria for the enhancement of construction materials has been a focus of study in the past few years. Microbial cells have been applied to consolidate the surface of different materials. Earthen plasters are eco-efficient building products that can be applied on new buildings but also used to protect cultural heritage structures, with several advantages. They are based on abundant, affordable and easy to obtain materials, but are vulnerable to water. New eco-efficient bioproducts were developed based on E. coli cultures supplemented with iron, that can be obtained as an industrial by-product. They were applied in laboratory on an earth plaster surface and the biotreatment efficacy was assessed. The main objective was to improve the durability of the plastering mortar when exposed to water. An optimized E. coli-iron based surface biotreatment strongly increased the plaster resistance to water with the application of only 0.0625 mL/cm2 of E. coli++Fe leading to a significant increase of water absorption time in comparison with similar plasters where the same amount of water was applied. Moreover, all biotreatments produced an increase of resistance to water absorption creating a slight waterproofing effect, ensuring compatibility. Their loss of efficacy with time guarantees reversibility of the intervention. The results show the interest to perform an in-depth study on the microstructure of biotreated earth mortars to understand the biotreatment effect.

KW - Bioconsolidation

KW - Biomineralization

KW - Compatibility

KW - Eco-efficiency

KW - Protection

KW - Reversibility

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DO - 10.1016/j.jclepro.2019.117803

M3 - Article

VL - 237

JO - Journal of Cleaner Production

JF - Journal of Cleaner Production

SN - 0959-6526

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