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- Publisher Website: 10.1016/j.cemconres.2020.106267
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Article: Autogenous formation and smart behaviors of nitrite- and nitrate-intercalated layered double hydroxides (LDHs) in Portland cement-metakaolin-dolomite blends
Title | Autogenous formation and smart behaviors of nitrite- and nitrate-intercalated layered double hydroxides (LDHs) in Portland cement-metakaolin-dolomite blends |
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Authors | |
Keywords | Corrosion inhibitors Layered double hydroxides Concrete durability Chloride binding Chloride resistance |
Issue Date | 2021 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/cemconres |
Citation | Cement and Concrete Research, 2021, v. 139, p. article no. 106267 How to Cite? |
Abstract | In this work, the influence of sodium nitrite (NaNO2) and sodium nitrate (NaNO3) corrosion inhibitors on the composition, structure, and chloride binding behaviors of layered double hydroxides (LDHs) formed in ternary ordinary Portland cement-metakaolin-dolomite (OPC-MK-DM) systems is studied. The results show that the nitrite and nitrate anions are preferably intercalated in the Casingle bondAl LDHs (AFm phases), but not in the Mgsingle bondAl LDHs (hydrotalcite-type phases) due to its limited formation in these ternary cementitious systems cured at ambient temperature. The autogenously formed nitrate- and nitrite-AFm phases are decomposed upon chloride exposure accompanied by Friedel's salts formation, potentially releasing corrosion inhibitive ions to the pore solution in a progressive manner. The NaNO2 and NaNO3 incorporation in ternary OPC-MK-DM binders marginally lowers chloride binding capacity but reduces its penetration resistance mainly due to pore coarsening. Nevertheless, a strong linear correlation can be established between the water-soluble and total chloride contents in ternary OPC-MK-DM systems, regardless of OPC replacement level and corrosion inhibitor incorporation. |
Persistent Identifier | http://hdl.handle.net/10722/293267 |
ISSN | 2023 Impact Factor: 10.9 2023 SCImago Journal Rankings: 4.781 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Ye, H | - |
dc.date.accessioned | 2020-11-23T08:14:15Z | - |
dc.date.available | 2020-11-23T08:14:15Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Cement and Concrete Research, 2021, v. 139, p. article no. 106267 | - |
dc.identifier.issn | 0008-8846 | - |
dc.identifier.uri | http://hdl.handle.net/10722/293267 | - |
dc.description.abstract | In this work, the influence of sodium nitrite (NaNO2) and sodium nitrate (NaNO3) corrosion inhibitors on the composition, structure, and chloride binding behaviors of layered double hydroxides (LDHs) formed in ternary ordinary Portland cement-metakaolin-dolomite (OPC-MK-DM) systems is studied. The results show that the nitrite and nitrate anions are preferably intercalated in the Casingle bondAl LDHs (AFm phases), but not in the Mgsingle bondAl LDHs (hydrotalcite-type phases) due to its limited formation in these ternary cementitious systems cured at ambient temperature. The autogenously formed nitrate- and nitrite-AFm phases are decomposed upon chloride exposure accompanied by Friedel's salts formation, potentially releasing corrosion inhibitive ions to the pore solution in a progressive manner. The NaNO2 and NaNO3 incorporation in ternary OPC-MK-DM binders marginally lowers chloride binding capacity but reduces its penetration resistance mainly due to pore coarsening. Nevertheless, a strong linear correlation can be established between the water-soluble and total chloride contents in ternary OPC-MK-DM systems, regardless of OPC replacement level and corrosion inhibitor incorporation. | - |
dc.language | eng | - |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/cemconres | - |
dc.relation.ispartof | Cement and Concrete Research | - |
dc.subject | Corrosion inhibitors | - |
dc.subject | Layered double hydroxides | - |
dc.subject | Concrete durability | - |
dc.subject | Chloride binding | - |
dc.subject | Chloride resistance | - |
dc.title | Autogenous formation and smart behaviors of nitrite- and nitrate-intercalated layered double hydroxides (LDHs) in Portland cement-metakaolin-dolomite blends | - |
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 | 10.1016/j.cemconres.2020.106267 | - |
dc.identifier.scopus | eid_2-s2.0-85092904561 | - |
dc.identifier.hkuros | 318757 | - |
dc.identifier.volume | 139 | - |
dc.identifier.spage | article no. 106267 | - |
dc.identifier.epage | article no. 106267 | - |
dc.identifier.isi | WOS:000602555800014 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0008-8846 | - |