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- Publisher Website: 10.1016/j.cemconres.2023.107256
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Article: Composition, nanostructure and stability of Cu-modified C-A-S-H in antibacterial alkali-activated slag
| Title | Composition, nanostructure and stability of Cu-modified C-A-S-H in antibacterial alkali-activated slag |
|---|---|
| Authors | |
| Keywords | Acidithiobacillus thiooxidans Alkali-activated slag Antimicrobial concrete MICC |
| Issue Date | 1-Oct-2023 |
| Publisher | Elsevier |
| Citation | Cement and Concrete Research, 2023, v. 172 How to Cite? |
| Abstract | Antimicrobial alkali-activated slag (AAS) has been envisioned as a biologically resistant binder for potential application in sewer structures against biogenic sulfuric acid attacks. This work investigates the composition, phase assemblage, micro- and nano-structural alterations of AAS binders incorporating Cu-based antimicrobial agents (i.e., copper oxide and copper nitrate), as well as their antimicrobial properties and degradation mechanism under biological corrosion caused by sulphur-oxidising bacteria Acidithiobacillus thiooxidans. The results show that the incorporation of copper oxide or copper nitrate increases the degree of hydration of slag but reduces the mean chain length (MCL) of C-A-S-H as Cu preferably affects the bridging AlO4-tetrahedra over SiO4-tetrahedra. The substitution of Cu for the Ca |
| Persistent Identifier | http://hdl.handle.net/10722/338239 |
| ISSN | 2023 Impact Factor: 10.9 2023 SCImago Journal Rankings: 4.781 |
| ISI Accession Number ID |
O polyhedral at the edges and corners of the C-A-S-H main chain makes the Al linkage blocked. Cu also possesses a charge-balancing role, resulting in a lower
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Kang, Xiaojuan | - |
| dc.contributor.author | Ye, Hailong | - |
| dc.date.accessioned | 2024-03-11T10:27:18Z | - |
| dc.date.available | 2024-03-11T10:27:18Z | - |
| dc.date.issued | 2023-10-01 | - |
| dc.identifier.citation | Cement and Concrete Research, 2023, v. 172 | - |
| dc.identifier.issn | 0008-8846 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/338239 | - |
| dc.description.abstract | <p>Antimicrobial alkali-activated slag (AAS) has been envisioned as a biologically <a href="https://www.sciencedirect.com/topics/engineering/resistant-binder" title="Learn more about resistant binder from ScienceDirect's AI-generated Topic Pages">resistant binder</a> for potential application in sewer structures against biogenic sulfuric acid attacks. This work investigates the composition, phase assemblage, micro- and nano-structural alterations of AAS binders incorporating Cu-based antimicrobial agents (i.e., copper oxide and copper nitrate), as well as their antimicrobial properties and <a href="https://www.sciencedirect.com/topics/engineering/degradation-mechanism" title="Learn more about degradation mechanism from ScienceDirect's AI-generated Topic Pages">degradation mechanism</a> under biological corrosion caused by sulphur-oxidising bacteria <em>Acidithiobacillus thiooxidans</em>. The results show that the incorporation of copper oxide or copper nitrate increases the degree of hydration of slag but reduces the mean chain length (MCL) of C-A-S-H as Cu preferably affects the bridging AlO<sub>4</sub>-tetrahedra over SiO<sub>4</sub>-tetrahedra. The substitution of Cu for the Ca<img src="https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif" alt="single bond">O polyhedral at the edges and corners of the C-A-S-H main chain makes the Al linkage blocked. Cu also possesses a charge-balancing role, resulting in a lower <a href="https://www.sciencedirect.com/topics/engineering/protonation" title="Learn more about protonation from ScienceDirect's AI-generated Topic Pages">protonation</a> of C-A-S-H in the Cu-doped AAS than that in the neat AAS, where C-A-S-H is a Tobermorite structure with MCL between 5 and 11. The Cu-doped AAS pastes show excellent antimicrobial efficiency, in particular, the CuO-doped AAS demonstrates 100 % effectiveness in inhibiting <a href="https://www.sciencedirect.com/topics/materials-science/biofilms" title="Learn more about biofilm from ScienceDirect's AI-generated Topic Pages">biofilm</a> formation, with the <a href="https://www.sciencedirect.com/topics/engineering/corrosion-depth" title="Learn more about corrosion depth from ScienceDirect's AI-generated Topic Pages">corrosion depth</a> significantly reduced by a factor of 10. The Cu ion is released initially from the outer surface of C-A-S-H due to its low bond dissociation energy, followed by the weak position, namely the AlO<sub>4</sub>-tetrahedra at the bridging position, rendering the rupturing of the C-A-S-H structure.<br></p> | - |
| dc.language | eng | - |
| dc.publisher | Elsevier | - |
| dc.relation.ispartof | Cement and Concrete Research | - |
| dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
| dc.subject | Acidithiobacillus thiooxidans | - |
| dc.subject | Alkali-activated slag | - |
| dc.subject | Antimicrobial concrete | - |
| dc.subject | MICC | - |
| dc.title | Composition, nanostructure and stability of Cu-modified C-A-S-H in antibacterial alkali-activated slag | - |
| dc.type | Article | - |
| dc.identifier.doi | 10.1016/j.cemconres.2023.107256 | - |
| dc.identifier.scopus | eid_2-s2.0-85164212553 | - |
| dc.identifier.volume | 172 | - |
| dc.identifier.eissn | 1873-3948 | - |
| dc.identifier.isi | WOS:001041303800001 | - |
| dc.identifier.issnl | 0008-8846 | - |