Single-crystal elastic constants of natural ettringite

Sergio Speziale; Fuming Jiang; Zhu Mao; Paulo J.M. Monteiro; Hans Rudolf Wenk; Thomas S. Duffy; Frank R. Schilling

doi:10.1016/j.cemconres.2008.02.004

Single-crystal elastic constants of natural ettringite

Sergio Speziale, Fuming Jiang, Zhu Mao, Paulo J.M. Monteiro, Hans Rudolf Wenk, Thomas S. Duffy, Frank R. Schilling

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

The single-crystal elastic constants of natural ettringite were determined by Brillouin spectroscopy at ambient conditions. The six non-zero elastic constants of this trigonal mineral are: C₁₁ = 35.1 ± 0.1 GPa, C₁₂ = 21.9 ±0.1 GPa, C₁₃ = 20.0 ± 0.5 GPa, C₁₄ = 0.6 ± 0.2 GPa, C₃₃ = 55 ± 1 GPa, C₄₄ = 11.0 ± 0.2 GPa. The Hill average of the aggregate bulk, shear modulus and the polycrystal Young's modulus and Poisson's ratio are 27.3 ± 0.9 GPa, 9.5 ± 0.8 GPa, 25 ± 2 GPa and 0.34 ± 0.02 respectively. The longitudinal and shear elastic anisotropy are C₃₃/C₁₁ = 0.64 ± 0.01 and C₆₆/C₄₄ =0.60 ± 0.01. The elastic anisotropy in ettringite is connected to its crystallographic structure. Stiff chains of [Al(OH)₆]^3- octahedra alternating with triplets of Ca²⁺ in eight-fold coordination run parallel to the c-axis leading to higher stiffness along this direction. The determination of the elastic stiffness tensor can help in the prediction of the early age properties of cement paste when ettringite crystals precipitate and in the modeling of both internal and external sulfate attack when secondary ettringite formation leads to expansion of concrete.

Original language	English (US)
Pages (from-to)	885-889
Number of pages	5
Journal	Cement and Concrete Research
Volume	38
Issue number	7
DOIs	https://doi.org/10.1016/j.cemconres.2008.02.004
State	Published - Jul 2008

All Science Journal Classification (ASJC) codes

Building and Construction
General Materials Science

Keywords

Brillouin spectroscopy
Crystal structure
Elastic moduli
Sulfate

Access to Document

10.1016/j.cemconres.2008.02.004

Cite this

@article{f52ddbfde01b47d5a078a27c4352e4fb,

title = "Single-crystal elastic constants of natural ettringite",

abstract = "The single-crystal elastic constants of natural ettringite were determined by Brillouin spectroscopy at ambient conditions. The six non-zero elastic constants of this trigonal mineral are: C11 = 35.1 ± 0.1 GPa, C12 = 21.9 ±0.1 GPa, C13 = 20.0 ± 0.5 GPa, C14 = 0.6 ± 0.2 GPa, C33 = 55 ± 1 GPa, C44 = 11.0 ± 0.2 GPa. The Hill average of the aggregate bulk, shear modulus and the polycrystal Young's modulus and Poisson's ratio are 27.3 ± 0.9 GPa, 9.5 ± 0.8 GPa, 25 ± 2 GPa and 0.34 ± 0.02 respectively. The longitudinal and shear elastic anisotropy are C33/C11 = 0.64 ± 0.01 and C66/C44 =0.60 ± 0.01. The elastic anisotropy in ettringite is connected to its crystallographic structure. Stiff chains of [Al(OH)6]3- octahedra alternating with triplets of Ca2+ in eight-fold coordination run parallel to the c-axis leading to higher stiffness along this direction. The determination of the elastic stiffness tensor can help in the prediction of the early age properties of cement paste when ettringite crystals precipitate and in the modeling of both internal and external sulfate attack when secondary ettringite formation leads to expansion of concrete.",

keywords = "Brillouin spectroscopy, Crystal structure, Elastic moduli, Sulfate",

author = "Sergio Speziale and Fuming Jiang and Zhu Mao and Monteiro, {Paulo J.M.} and Wenk, {Hans Rudolf} and Duffy, {Thomas S.} and Schilling, {Frank R.}",

note = "Funding Information: The research was supported in part by the NSF (062464) and the Carnegie-DOE Alliance Center (CDAC). S.S. has been supported by Miller Institute for Basic Research in Science at the University of California at Berkeley during the initial stages of the project. P.J.M.M. and H.R.W. appreciate support from KAUST.",

year = "2008",

month = jul,

doi = "10.1016/j.cemconres.2008.02.004",

language = "English (US)",

volume = "38",

pages = "885--889",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Ltd",

number = "7",

}

TY - JOUR

T1 - Single-crystal elastic constants of natural ettringite

AU - Speziale, Sergio

AU - Jiang, Fuming

AU - Mao, Zhu

AU - Monteiro, Paulo J.M.

AU - Wenk, Hans Rudolf

AU - Duffy, Thomas S.

AU - Schilling, Frank R.

N1 - Funding Information: The research was supported in part by the NSF (062464) and the Carnegie-DOE Alliance Center (CDAC). S.S. has been supported by Miller Institute for Basic Research in Science at the University of California at Berkeley during the initial stages of the project. P.J.M.M. and H.R.W. appreciate support from KAUST.

PY - 2008/7

Y1 - 2008/7

N2 - The single-crystal elastic constants of natural ettringite were determined by Brillouin spectroscopy at ambient conditions. The six non-zero elastic constants of this trigonal mineral are: C11 = 35.1 ± 0.1 GPa, C12 = 21.9 ±0.1 GPa, C13 = 20.0 ± 0.5 GPa, C14 = 0.6 ± 0.2 GPa, C33 = 55 ± 1 GPa, C44 = 11.0 ± 0.2 GPa. The Hill average of the aggregate bulk, shear modulus and the polycrystal Young's modulus and Poisson's ratio are 27.3 ± 0.9 GPa, 9.5 ± 0.8 GPa, 25 ± 2 GPa and 0.34 ± 0.02 respectively. The longitudinal and shear elastic anisotropy are C33/C11 = 0.64 ± 0.01 and C66/C44 =0.60 ± 0.01. The elastic anisotropy in ettringite is connected to its crystallographic structure. Stiff chains of [Al(OH)6]3- octahedra alternating with triplets of Ca2+ in eight-fold coordination run parallel to the c-axis leading to higher stiffness along this direction. The determination of the elastic stiffness tensor can help in the prediction of the early age properties of cement paste when ettringite crystals precipitate and in the modeling of both internal and external sulfate attack when secondary ettringite formation leads to expansion of concrete.

AB - The single-crystal elastic constants of natural ettringite were determined by Brillouin spectroscopy at ambient conditions. The six non-zero elastic constants of this trigonal mineral are: C11 = 35.1 ± 0.1 GPa, C12 = 21.9 ±0.1 GPa, C13 = 20.0 ± 0.5 GPa, C14 = 0.6 ± 0.2 GPa, C33 = 55 ± 1 GPa, C44 = 11.0 ± 0.2 GPa. The Hill average of the aggregate bulk, shear modulus and the polycrystal Young's modulus and Poisson's ratio are 27.3 ± 0.9 GPa, 9.5 ± 0.8 GPa, 25 ± 2 GPa and 0.34 ± 0.02 respectively. The longitudinal and shear elastic anisotropy are C33/C11 = 0.64 ± 0.01 and C66/C44 =0.60 ± 0.01. The elastic anisotropy in ettringite is connected to its crystallographic structure. Stiff chains of [Al(OH)6]3- octahedra alternating with triplets of Ca2+ in eight-fold coordination run parallel to the c-axis leading to higher stiffness along this direction. The determination of the elastic stiffness tensor can help in the prediction of the early age properties of cement paste when ettringite crystals precipitate and in the modeling of both internal and external sulfate attack when secondary ettringite formation leads to expansion of concrete.

KW - Brillouin spectroscopy

KW - Crystal structure

KW - Elastic moduli

KW - Sulfate

UR - http://www.scopus.com/inward/record.url?scp=44149083271&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44149083271&partnerID=8YFLogxK

U2 - 10.1016/j.cemconres.2008.02.004

DO - 10.1016/j.cemconres.2008.02.004

M3 - Article

AN - SCOPUS:44149083271

SN - 0008-8846

VL - 38

SP - 885

EP - 889

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 7

ER -

Single-crystal elastic constants of natural ettringite

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this