Determination of the elastic constants of portlandite by Brillouin spectroscopy

Handle URI:
http://hdl.handle.net/10754/597958
Title:
Determination of the elastic constants of portlandite by Brillouin spectroscopy
Authors:
Speziale, S.; Reichmann, H.J.; Schilling, F.R.; Wenk, H.R.; Monteiro, P.J.M.
Abstract:
The single crystal elastic constants Cij and the shear and adiabatic bulk modulus of a natural portlandite (Ca(OH)2) crystal were determined by Brillouin spectroscopy at ambient conditions. The elastic constants, expressed in GPa, are: C11 = 102.0(± 2.0), C12 = 32.1(± 1.0), C13 = 8.4(± 0.4), C14 = 4.5(± 0.2), C33 = 33.6(± 0.7), C44 = 12.0(± 0.3), C66 = (C11-C12)/2 = 35.0(± 1.1), where the numbers in parentheses are 1σ standard deviations. The Reuss bounds of the adiabatic bulk and shear moduli are K0S = 26.0(± 0.3) GPa and G0 = 17.5(± 0.4) GPa, respectively, while the Voigt bounds of these moduli are K0S = 37.3(± 0.4) GPa and G0 = 24.4(± 0.3) GPa. The Reuss and Voigt bounds for the aggregate Young's modulus are 42.8(± 1.0) GPa and 60.0(± 0.8) GPa respectively, while the aggregate Poisson's ratio is equal to 0.23(± 0.01). Portlandite exhibits both large compressional elastic anisotropy with C11/C33 = 3.03(± 0.09) equivalent to that of the isostructural hydroxide brucite (Mg(OH)2), and large shear anisotropy with C66/C44 = 2.92(± 0.12) which is 11% larger than brucite. The comparison between the bulk modulus of portlandite and that of lime (CaO) confirms a systematic linear relationship between the bulk moduli of brucite-type simple hydroxides and the corresponding NaCl-type oxides. © 2008 Elsevier Ltd. All rights reserved.
Citation:
Speziale S, Reichmann HJ, Schilling FR, Wenk HR, Monteiro PJM (2008) Determination of the elastic constants of portlandite by Brillouin spectroscopy. Cement and Concrete Research 38: 1148–1153. Available: http://dx.doi.org/10.1016/j.cemconres.2008.05.006.
Publisher:
Elsevier BV
Journal:
Cement and Concrete Research
Issue Date:
Oct-2008
DOI:
10.1016/j.cemconres.2008.05.006
Type:
Article
ISSN:
0008-8846
Sponsors:
The GeoForschungsZentrum Potsdam is part of the Helmholtz Gemeinschaft. P.J.M.M. and H.R.W. appreciate support from the KAUST.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorSpeziale, S.en
dc.contributor.authorReichmann, H.J.en
dc.contributor.authorSchilling, F.R.en
dc.contributor.authorWenk, H.R.en
dc.contributor.authorMonteiro, P.J.M.en
dc.date.accessioned2016-02-25T12:59:32Zen
dc.date.available2016-02-25T12:59:32Zen
dc.date.issued2008-10en
dc.identifier.citationSpeziale S, Reichmann HJ, Schilling FR, Wenk HR, Monteiro PJM (2008) Determination of the elastic constants of portlandite by Brillouin spectroscopy. Cement and Concrete Research 38: 1148–1153. Available: http://dx.doi.org/10.1016/j.cemconres.2008.05.006.en
dc.identifier.issn0008-8846en
dc.identifier.doi10.1016/j.cemconres.2008.05.006en
dc.identifier.urihttp://hdl.handle.net/10754/597958en
dc.description.abstractThe single crystal elastic constants Cij and the shear and adiabatic bulk modulus of a natural portlandite (Ca(OH)2) crystal were determined by Brillouin spectroscopy at ambient conditions. The elastic constants, expressed in GPa, are: C11 = 102.0(± 2.0), C12 = 32.1(± 1.0), C13 = 8.4(± 0.4), C14 = 4.5(± 0.2), C33 = 33.6(± 0.7), C44 = 12.0(± 0.3), C66 = (C11-C12)/2 = 35.0(± 1.1), where the numbers in parentheses are 1σ standard deviations. The Reuss bounds of the adiabatic bulk and shear moduli are K0S = 26.0(± 0.3) GPa and G0 = 17.5(± 0.4) GPa, respectively, while the Voigt bounds of these moduli are K0S = 37.3(± 0.4) GPa and G0 = 24.4(± 0.3) GPa. The Reuss and Voigt bounds for the aggregate Young's modulus are 42.8(± 1.0) GPa and 60.0(± 0.8) GPa respectively, while the aggregate Poisson's ratio is equal to 0.23(± 0.01). Portlandite exhibits both large compressional elastic anisotropy with C11/C33 = 3.03(± 0.09) equivalent to that of the isostructural hydroxide brucite (Mg(OH)2), and large shear anisotropy with C66/C44 = 2.92(± 0.12) which is 11% larger than brucite. The comparison between the bulk modulus of portlandite and that of lime (CaO) confirms a systematic linear relationship between the bulk moduli of brucite-type simple hydroxides and the corresponding NaCl-type oxides. © 2008 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThe GeoForschungsZentrum Potsdam is part of the Helmholtz Gemeinschaft. P.J.M.M. and H.R.W. appreciate support from the KAUST.en
dc.publisherElsevier BVen
dc.subjectCa(OH)2en
dc.subjectCementen
dc.subjectElastic modulien
dc.titleDetermination of the elastic constants of portlandite by Brillouin spectroscopyen
dc.typeArticleen
dc.identifier.journalCement and Concrete Researchen
dc.contributor.institutionDeutsches GeoForschungsZentrum (GFZ), Potsdam, Germanyen
dc.contributor.institutionUC Berkeley, Berkeley, United Statesen
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