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Article: Influence of Nitrate Corrosion Inhibitors on Phase Stability of Alkali-Activated Slag against Chloride Binding and Natural Carbonation
Title | Influence of Nitrate Corrosion Inhibitors on Phase Stability of Alkali-Activated Slag against Chloride Binding and Natural Carbonation |
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Authors | |
Keywords | Alkali-activated binder Carbonation Chloride Nitrate-based corrosion inhibitors Slag |
Issue Date | 2019 |
Publisher | American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/mt.html |
Citation | Journal of Materials in Civil Engineering, 2019, v. 31 n. 8, p. article no. 04019160 How to Cite? |
Abstract | Nitrate and nitrite-based corrosion inhibitors have been studied for decades for mitigating corrosion of steel embedded in ordinary portland cement (OPC) concrete; however, few studies are available regarding the effect of nitrate or nitrite on the performance of alkali-activated binders. This work, for the first time, investigates the influence of three nitrate-containing activators (i.e., sodium nitrate, magnesium nitrate, and aluminum nitrate, each mixed with sodium hydroxide solution) on the strength development, pore structure, phase assemblage, and phase stability of alkali-activated slag (AAS) binders upon exposure to chloride and natural carbonation. The results show that the addition of nitrate, regardless of its form, does not substantially alter the type of main reacted phases, i.e., calcium-aluminosilicate-hydrate (C-A-S-H) and Mg-Al layered double hydroxides (LDHs), in AAS; however, the addition of aluminum nitrate improves its compressive strength, boosts the formation of Ca-Al LDHs (AFm-type phase), and likely inserts nitrate anions in the interlayer of formed Ca-Al or Mg-Al LDHs. The findings suggest that the nitrate-intercalated Ca-Al LDHs and/or Mg-Al LDHs, if formed to some extent, can potentially release nitrate ions during chloride binding and carbonation, working as a smart corrosion inhibitor. |
Persistent Identifier | http://hdl.handle.net/10722/293546 |
ISSN | 2023 Impact Factor: 3.1 2023 SCImago Journal Rankings: 0.964 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Ye, H | - |
dc.contributor.author | CHEN, Z | - |
dc.date.accessioned | 2020-11-23T08:18:21Z | - |
dc.date.available | 2020-11-23T08:18:21Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Journal of Materials in Civil Engineering, 2019, v. 31 n. 8, p. article no. 04019160 | - |
dc.identifier.issn | 0899-1561 | - |
dc.identifier.uri | http://hdl.handle.net/10722/293546 | - |
dc.description.abstract | Nitrate and nitrite-based corrosion inhibitors have been studied for decades for mitigating corrosion of steel embedded in ordinary portland cement (OPC) concrete; however, few studies are available regarding the effect of nitrate or nitrite on the performance of alkali-activated binders. This work, for the first time, investigates the influence of three nitrate-containing activators (i.e., sodium nitrate, magnesium nitrate, and aluminum nitrate, each mixed with sodium hydroxide solution) on the strength development, pore structure, phase assemblage, and phase stability of alkali-activated slag (AAS) binders upon exposure to chloride and natural carbonation. The results show that the addition of nitrate, regardless of its form, does not substantially alter the type of main reacted phases, i.e., calcium-aluminosilicate-hydrate (C-A-S-H) and Mg-Al layered double hydroxides (LDHs), in AAS; however, the addition of aluminum nitrate improves its compressive strength, boosts the formation of Ca-Al LDHs (AFm-type phase), and likely inserts nitrate anions in the interlayer of formed Ca-Al or Mg-Al LDHs. The findings suggest that the nitrate-intercalated Ca-Al LDHs and/or Mg-Al LDHs, if formed to some extent, can potentially release nitrate ions during chloride binding and carbonation, working as a smart corrosion inhibitor. | - |
dc.language | eng | - |
dc.publisher | American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/mt.html | - |
dc.relation.ispartof | Journal of Materials in Civil Engineering | - |
dc.rights | Journal of Materials in Civil Engineering. Copyright © American Society of Civil Engineers. | - |
dc.rights | This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at [URL/link of abstract in the ASCE Library or Civil Engineering Database]. | - |
dc.subject | Alkali-activated binder | - |
dc.subject | Carbonation | - |
dc.subject | Chloride | - |
dc.subject | Nitrate-based corrosion inhibitors | - |
dc.subject | Slag | - |
dc.title | Influence of Nitrate Corrosion Inhibitors on Phase Stability of Alkali-Activated Slag against Chloride Binding and Natural Carbonation | - |
dc.type | Article | - |
dc.identifier.email | Ye, H: hlye@hku.hk | - |
dc.identifier.authority | Ye, H=rp02379 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1061/(ASCE)MT.1943-5533.0002830 | - |
dc.identifier.scopus | eid_2-s2.0-85066139047 | - |
dc.identifier.hkuros | 319186 | - |
dc.identifier.volume | 31 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | article no. 04019160 | - |
dc.identifier.epage | article no. 04019160 | - |
dc.identifier.isi | WOS:000471820600028 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0899-1561 | - |