Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste

Handle URI:
http://hdl.handle.net/10754/597775
Title:
Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste
Authors:
Yoon, Seyoon; Moon, Juhyuk; Bae, Sungchul; Duan, Xiaonan; Giannelis, Emmanuel P.; Monteiro, Paulo M.
Abstract:
This study investigated the feasibility of using calcined layered double hydroxides (CLDHs) to prevent chloride-induced deterioration in reinforced concrete. CLDHs not only adsorbed chloride ions in aqueous solution with a memory effect but also had a much higher binding capacity than the original layered double hydroxides (LDHs) in the cement matrix. We investigated this adsorption in hardened cement paste in batch cultures to determine adsorption isotherms. The measured and theoretical binding capacities (153 mg g -1 and 257 mg g-1, respectively) of the CLDHs were comparable to the theoretical capacity of Friedel's salt (2 mol mol-1 or 121 mg g-1), which belongs to the LDH family among cementitious phases. We simulated chloride adsorption by CLDHs through the cement matrix using the Fickian model and compared the simulation result to the X-ray fluorescence (XRF) chlorine map. Based on our results, it is proposed that the adsorption process is governed by the chloride transport through the cement matrix; this process differs from that in an aqueous solution. X-ray diffraction (XRD) analysis showed that the CLDH rebuilds the layered structure in a cementitious environment, thereby demonstrating the feasibility of applying CLDHs to the cement and concrete industries. © 2014 Published by Elsevier B.V. All rights reserved.
Citation:
Yoon S, Moon J, Bae S, Duan X, Giannelis EP, et al. (2014) Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste. Materials Chemistry and Physics 145: 376–386. Available: http://dx.doi.org/10.1016/j.matchemphys.2014.02.026.
Publisher:
Elsevier BV
Journal:
Materials Chemistry and Physics
KAUST Grant Number:
KUS-I1-004021; KUS-C1-018-02
Issue Date:
Jun-2014
DOI:
10.1016/j.matchemphys.2014.02.026
Type:
Article
ISSN:
0254-0584
Sponsors:
This publication was based on work supported in part by Award No. KUS-I1-004021 and No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). We acknowledge Sasol Company for a sample of Pural MG 63 HT.
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Full metadata record

DC FieldValue Language
dc.contributor.authorYoon, Seyoonen
dc.contributor.authorMoon, Juhyuken
dc.contributor.authorBae, Sungchulen
dc.contributor.authorDuan, Xiaonanen
dc.contributor.authorGiannelis, Emmanuel P.en
dc.contributor.authorMonteiro, Paulo M.en
dc.date.accessioned2016-02-25T12:56:29Zen
dc.date.available2016-02-25T12:56:29Zen
dc.date.issued2014-06en
dc.identifier.citationYoon S, Moon J, Bae S, Duan X, Giannelis EP, et al. (2014) Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste. Materials Chemistry and Physics 145: 376–386. Available: http://dx.doi.org/10.1016/j.matchemphys.2014.02.026.en
dc.identifier.issn0254-0584en
dc.identifier.doi10.1016/j.matchemphys.2014.02.026en
dc.identifier.urihttp://hdl.handle.net/10754/597775en
dc.description.abstractThis study investigated the feasibility of using calcined layered double hydroxides (CLDHs) to prevent chloride-induced deterioration in reinforced concrete. CLDHs not only adsorbed chloride ions in aqueous solution with a memory effect but also had a much higher binding capacity than the original layered double hydroxides (LDHs) in the cement matrix. We investigated this adsorption in hardened cement paste in batch cultures to determine adsorption isotherms. The measured and theoretical binding capacities (153 mg g -1 and 257 mg g-1, respectively) of the CLDHs were comparable to the theoretical capacity of Friedel's salt (2 mol mol-1 or 121 mg g-1), which belongs to the LDH family among cementitious phases. We simulated chloride adsorption by CLDHs through the cement matrix using the Fickian model and compared the simulation result to the X-ray fluorescence (XRF) chlorine map. Based on our results, it is proposed that the adsorption process is governed by the chloride transport through the cement matrix; this process differs from that in an aqueous solution. X-ray diffraction (XRD) analysis showed that the CLDH rebuilds the layered structure in a cementitious environment, thereby demonstrating the feasibility of applying CLDHs to the cement and concrete industries. © 2014 Published by Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis publication was based on work supported in part by Award No. KUS-I1-004021 and No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). We acknowledge Sasol Company for a sample of Pural MG 63 HT.en
dc.publisherElsevier BVen
dc.subjectA. Composite materialen
dc.subjectD. Adsorptionen
dc.subjectD. Corrosionen
dc.subjectD. Diffusionen
dc.titleChloride adsorption by calcined layered double hydroxides in hardened Portland cement pasteen
dc.typeArticleen
dc.identifier.journalMaterials Chemistry and Physicsen
dc.contributor.institutionUniversity of Aberdeen, Aberdeen, United Kingdomen
dc.contributor.institutionStony Brook University State University of New York, Stony Brook, United Statesen
dc.contributor.institutionUC Berkeley, Berkeley, United Statesen
dc.contributor.institutionCornell University, Ithaca, United Statesen
dc.contributor.institutionKing Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabiaen
kaust.grant.numberKUS-I1-004021en
kaust.grant.numberKUS-C1-018-02en
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