Characterization of natural pozzolan-based geopolymeric binders

Handle URI:
http://hdl.handle.net/10754/597760
Title:
Characterization of natural pozzolan-based geopolymeric binders
Authors:
Moon, Juhyuk; Bae, Sungchul; Celik, Kemal; Yoon, Seyoon ( 0000-0002-3451-5518 ) ; Kim, Ki-Hyun; Kim, Kang Su; Monteiro, Paulo J.M.
Abstract:
Properties and characteristics of fly ash- or slag-based geopolymers have been extensively explored but comparatively less information is available for natural pozzolan-based geopolymers. The present work focuses on microstructural characteristics of natural pozzolan-based geopolymers activated by sodium hydroxide and a mixture of sodium hydroxide and sodium silicate. Synchrotron XRD and SEM-EDS studies combined with compressive strength tests successfully demonstrate the feasibility of the use of natural pozzolan for sustainable construction material. It is concluded that the geopolymers have sufficient strength as structural materials and matrices contain C-S-H like crystal as well as zeolites of hydroxysodalite and zeolite Y. Two zeolites of hydroxysodalite and zeolite Y are found as the main activation products in sodium hydroxide activation. Substitution with sodium silicate solution yields higher compressive strength and a denser microstructure with dominant activation products of C-S-H like crystal, zeolite Y, and phillipsite. It has been proposed that the crystal size of the activation products ranges from 10 nm to 1 μm. Different microstructural characteristics found herein provide a valuable information to develop natural pozzolan-based sustainable structural materials with improved properties. © 2014 Elsevier Ltd. All rights reserved.
Citation:
Moon J, Bae S, Celik K, Yoon S, Kim K-H, et al. (2014) Characterization of natural pozzolan-based geopolymeric binders. Cement and Concrete Composites 53: 97–104. Available: http://dx.doi.org/10.1016/j.cemconcomp.2014.06.010.
Publisher:
Elsevier BV
Journal:
Cement and Concrete Composites
KAUST Grant Number:
KUS-l1-004021
Issue Date:
Oct-2014
DOI:
10.1016/j.cemconcomp.2014.06.010
Type:
Article
ISSN:
0958-9465
Sponsors:
This research was funded by Award No. KUS-l1-004021, from King Abdullah University of Science and Technology. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under No. DE-AC02-05CH11231.
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Full metadata record

DC FieldValue Language
dc.contributor.authorMoon, Juhyuken
dc.contributor.authorBae, Sungchulen
dc.contributor.authorCelik, Kemalen
dc.contributor.authorYoon, Seyoonen
dc.contributor.authorKim, Ki-Hyunen
dc.contributor.authorKim, Kang Suen
dc.contributor.authorMonteiro, Paulo J.M.en
dc.date.accessioned2016-02-25T12:56:14Zen
dc.date.available2016-02-25T12:56:14Zen
dc.date.issued2014-10en
dc.identifier.citationMoon J, Bae S, Celik K, Yoon S, Kim K-H, et al. (2014) Characterization of natural pozzolan-based geopolymeric binders. Cement and Concrete Composites 53: 97–104. Available: http://dx.doi.org/10.1016/j.cemconcomp.2014.06.010.en
dc.identifier.issn0958-9465en
dc.identifier.doi10.1016/j.cemconcomp.2014.06.010en
dc.identifier.urihttp://hdl.handle.net/10754/597760en
dc.description.abstractProperties and characteristics of fly ash- or slag-based geopolymers have been extensively explored but comparatively less information is available for natural pozzolan-based geopolymers. The present work focuses on microstructural characteristics of natural pozzolan-based geopolymers activated by sodium hydroxide and a mixture of sodium hydroxide and sodium silicate. Synchrotron XRD and SEM-EDS studies combined with compressive strength tests successfully demonstrate the feasibility of the use of natural pozzolan for sustainable construction material. It is concluded that the geopolymers have sufficient strength as structural materials and matrices contain C-S-H like crystal as well as zeolites of hydroxysodalite and zeolite Y. Two zeolites of hydroxysodalite and zeolite Y are found as the main activation products in sodium hydroxide activation. Substitution with sodium silicate solution yields higher compressive strength and a denser microstructure with dominant activation products of C-S-H like crystal, zeolite Y, and phillipsite. It has been proposed that the crystal size of the activation products ranges from 10 nm to 1 μm. Different microstructural characteristics found herein provide a valuable information to develop natural pozzolan-based sustainable structural materials with improved properties. © 2014 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThis research was funded by Award No. KUS-l1-004021, from King Abdullah University of Science and Technology. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under No. DE-AC02-05CH11231.en
dc.publisherElsevier BVen
dc.subjectBasaltic ashen
dc.subjectCompressive strengthen
dc.subjectGeopolymeren
dc.subjectNatural pozzolanen
dc.titleCharacterization of natural pozzolan-based geopolymeric bindersen
dc.typeArticleen
dc.identifier.journalCement and Concrete Compositesen
dc.contributor.institutionStony Brook University State University of New York, Stony Brook, United Statesen
dc.contributor.institutionUC Berkeley, Berkeley, United Statesen
dc.contributor.institutionUniversity of Seoul, Seoul, South Koreaen
kaust.grant.numberKUS-l1-004021en
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