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A platform for research: civil engineering, architecture and urbanism
Cu- and Zn-doped alkali activated mortar – Properties and durability in (bio)chemically aggressive wastewater environments
https://orcid.org/0000-0002-1777-3558
https://orcid.org/0000-0002-8937-3027
https://orcid.org/0000-0003-4122-0547
https://orcid.org/0000-0003-0468-1432
https://orcid.org/0000-0002-8951-7393
https://orcid.org/0000-0003-0014-8905
https://orcid.org/0000-0003-2222-2459
https://orcid.org/0000-0003-0474-4798
Abstract Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4·5H2O and ZnO addition (mass ratio Mn+/solid binder 0.08% to 1.7%) - were casted and exposed within an extensive long-term field campaign over the period of 20 months to a sewer basin, strongly affected by biogenic acid corrosion. (Un-)exposed AAM were tested regarding their physicochemical and microstructural properties, bioreceptivity and overall durability. Metal addition led to a retarding effect during alkali-activation reaction, as well as to an increase in open porosity of up to 3.0% and corresponding lower compressive strength of up to 10.9%. Reduced microbial colonization and diversity were observed on AAM with Cu, while Zn addition led to increased biodiversity. We propose that the observed higher durability of Cu-doped AAM is due to antibacterial effects and associated reduction of biogenic acid production, superseding overall negative effects of metal-dosage on physical material properties. Observed lower durability of Zn-doped AAM was related to combined negative physicochemical and microbial effects.
Cu- and Zn-doped alkali activated mortar – Properties and durability in (bio)chemically aggressive wastewater environments
https://orcid.org/0000-0002-1777-3558
https://orcid.org/0000-0002-8937-3027
https://orcid.org/0000-0003-4122-0547
https://orcid.org/0000-0003-0468-1432
https://orcid.org/0000-0002-8951-7393
https://orcid.org/0000-0003-0014-8905
https://orcid.org/0000-0003-2222-2459
https://orcid.org/0000-0003-0474-4798
Abstract Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4·5H2O and ZnO addition (mass ratio Mn+/solid binder 0.08% to 1.7%) - were casted and exposed within an extensive long-term field campaign over the period of 20 months to a sewer basin, strongly affected by biogenic acid corrosion. (Un-)exposed AAM were tested regarding their physicochemical and microstructural properties, bioreceptivity and overall durability. Metal addition led to a retarding effect during alkali-activation reaction, as well as to an increase in open porosity of up to 3.0% and corresponding lower compressive strength of up to 10.9%. Reduced microbial colonization and diversity were observed on AAM with Cu, while Zn addition led to increased biodiversity. We propose that the observed higher durability of Cu-doped AAM is due to antibacterial effects and associated reduction of biogenic acid production, superseding overall negative effects of metal-dosage on physical material properties. Observed lower durability of Zn-doped AAM was related to combined negative physicochemical and microbial effects.
Cu- and Zn-doped alkali activated mortar – Properties and durability in (bio)chemically aggressive wastewater environments
https://orcid.org/0000-0002-1777-3558
https://orcid.org/0000-0002-8937-3027
https://orcid.org/0000-0003-4122-0547
https://orcid.org/0000-0003-0468-1432
https://orcid.org/0000-0002-8951-7393
https://orcid.org/0000-0003-0014-8905
https://orcid.org/0000-0003-2222-2459
https://orcid.org/0000-0003-0474-4798
Abstract Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4·5H2O and ZnO addition (mass ratio Mn+/solid binder 0.08% to 1.7%) - were casted and exposed within an extensive long-term field campaign over the period of 20 months to a sewer basin, strongly affected by biogenic acid corrosion. (Un-)exposed AAM were tested regarding their physicochemical and microstructural properties, bioreceptivity and overall durability. Metal addition led to a retarding effect during alkali-activation reaction, as well as to an increase in open porosity of up to 3.0% and corresponding lower compressive strength of up to 10.9%. Reduced microbial colonization and diversity were observed on AAM with Cu, while Zn addition led to increased biodiversity. We propose that the observed higher durability of Cu-doped AAM is due to antibacterial effects and associated reduction of biogenic acid production, superseding overall negative effects of metal-dosage on physical material properties. Observed lower durability of Zn-doped AAM was related to combined negative physicochemical and microbial effects.
Cu- and Zn-doped alkali activated mortar – Properties and durability in (bio)chemically aggressive wastewater environments
Grengg, C. (author) / Koraimann, G. (author) / Ukrainczyk, N. (author) / Rudic, O. (author) / Luschnig, S. (author) / Gluth, G.J.G. (author) / Radtke, M. (author) / Dietzel, M. (author) / Mittermayr, F. (author)
2021-07-13
Article (Journal)
Electronic Resource
English
Alkali Activated Cementitious Materials in Chemically Aggressive Environments
| British Library Conference Proceedings | 1997
Durability of alkali-activated materials in aggressive environments: A review on recent studies
| British Library Online Contents | 2017
Durability of alkali-activated materials in aggressive environments: A review on recent studies
| British Library Online Contents | 2017
Durability of alkali-activated materials in aggressive environments: a review on recent studies
| Online Contents | 2017