Show simple item record

dc.contributor.authorMoon, Juhyuk
dc.contributor.authorBae, Sungchul
dc.contributor.authorCelik, Kemal
dc.contributor.authorYoon, Seyoon
dc.contributor.authorKim, Ki-Hyun
dc.contributor.authorKim, Kang Su
dc.contributor.authorMonteiro, Paulo J. M.
dc.date.accessioned2016-02-25T12:56:14Z
dc.date.available2016-02-25T12:56:14Z
dc.date.issued2014-10
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.
dc.identifier.issn0958-9465
dc.identifier.doi10.1016/j.cemconcomp.2014.06.010
dc.identifier.urihttp://hdl.handle.net/10754/597760
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.
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.
dc.publisherElsevier BV
dc.subjectBasaltic ash
dc.subjectCompressive strength
dc.subjectGeopolymer
dc.subjectNatural pozzolan
dc.titleCharacterization of natural pozzolan-based geopolymeric binders
dc.typeArticle
dc.identifier.journalCement and Concrete Composites
dc.contributor.institutionStony Brook University State University of New York, Stony Brook, United States
dc.contributor.institutionUC Berkeley, Berkeley, United States
dc.contributor.institutionUniversity of Seoul, Seoul, South Korea
kaust.grant.numberKUS-l1-004021


This item appears in the following Collection(s)

Show simple item record