Cu- and Zn-doped alkali activated mortar - Properties and durability in (bio)chemically aggressive wastewater environments

被引：20

作者：

Grengg, C. ^{[1
]}

Koraimann, G. ^{[2
]}

Ukrainczyk, N. ^{[3
]}

Rudic, O. ^{[4
]}

Luschnig, S. ^{[2
]}

Gluth, G. J. G. ^{[5
]}

Radtke, M. ^{[6
]}

Dietzel, M. ^{[1
]}

Mittermayr, F. ^{[4
]}

机构：

[1] Graz Univ Technol, Inst Appl Geosci, Rechbauerstr 12, A-8010 Graz, Austria

[2] Karl Franzens Univ Graz, Inst Mol Biosci, Humboldtstr 50, A-8010 Graz, Austria

[3] Tech Univ Darmstadt, Inst Construct & Bldg Mat, Franziska Braun Str 3, D-64287 Darmstadt, Germany

[4] Graz Univ Technol, Inst Technol & Testing Bldg Mat, Inffeldgasse 24, A-8010 Graz, Austria

[5] Bundesanstalt Mat Forsch & Prufung BAM, Div Technol Construct Mat 7 4, Unter Eichen 87, D-12205 Berlin, Germany

[6] Bundesanstalt Mat Forsch & Prufung BAM, Div Struct Anal 6 3, Richard Willstatter Str 11, D-12489 Berlin, Germany

来源：

CEMENT AND CONCRETE RESEARCH | 2021年 / 149卷

关键词：

Alkali activated materials; Biocorrosion; Antimicrobial agents; Durability; Microstructure; INDUCED CONCRETE CORROSION; CEMENTITIOUS MATERIALS; ACID RESISTANCE; VAPOR SORPTION; COPPER; GEOPOLYMERS; ADSORPTION; KINETICS; BEHAVIOR; PORTLAND;

D O I：

10.1016/j.cemconres.2021.106541

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4 center dot 5H(2)O 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.

引用

页数：15

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