Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress

Sungchul Bae, Hyeonseok Jee, Manabu Kanematsu, Ayumi Shiro, Akihiko Machida, Tetsu Watanuki, Takahisa Shobu, Hiroshi Suzuki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Despite enormous interest in calcium silicate hydrate (C–S–H), its detailed atomic structure and intrinsic deformation under an external load are lacking. This study demonstrates the nanostructural deformation process of C–S–H in tricalcium silicate (C3S) paste as a function of applied stress by interpreting atomic pair distribution function (PDF) based on in situ X-ray scattering. Three different strains in C3S paste under compression were compared using a strain gauge, Bragg peak shift, and the real space PDF. PDF refinement revealed that the C–S–H phase mostly contributed to PDF from 0 to 20 Å whereas crystalline phases dominated that beyond 20 Å. The short-range atomic strains exhibited two regions for C–S–H: I) plastic deformation (0-10 MPa) and II) linear elastic deformation (>10 MPa), whereas the long-range deformation beyond 20 Å was similar to that of Ca(OH)2. Below 10 MPa, the short-range strain was caused by the densification of C–S–H induced by the removal of interlayer or gel-pore water. The strain is likely to be recovered when the removed water returns to C–S–H.

Original languageEnglish
Pages (from-to)408-418
Number of pages11
JournalJournal of the American Ceramic Society
Volume101
Issue number1
DOIs
StatePublished - 2018 Jan 1

Fingerprint

Silicic Acid
Calcium silicate
Hydrates
Compressive stress
Distribution functions
silicate
calcium
Ointments
Water
Elastic deformation
Strain gages
X ray scattering
Densification
plastic deformation
Silicates
calcium silicate
analysis
distribution
Plastic deformation
Gels

Keywords

  • X-ray methods
  • calcium silicate hydrate
  • deformation
  • portland cement

Cite this

Bae, Sungchul ; Jee, Hyeonseok ; Kanematsu, Manabu ; Shiro, Ayumi ; Machida, Akihiko ; Watanuki, Tetsu ; Shobu, Takahisa ; Suzuki, Hiroshi. / Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress. In: Journal of the American Ceramic Society. 2018 ; Vol. 101, No. 1. pp. 408-418.
@article{71995cc7bc034966b380099eca76a35a,
title = "Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress",
abstract = "Despite enormous interest in calcium silicate hydrate (C–S–H), its detailed atomic structure and intrinsic deformation under an external load are lacking. This study demonstrates the nanostructural deformation process of C–S–H in tricalcium silicate (C3S) paste as a function of applied stress by interpreting atomic pair distribution function (PDF) based on in situ X-ray scattering. Three different strains in C3S paste under compression were compared using a strain gauge, Bragg peak shift, and the real space PDF. PDF refinement revealed that the C–S–H phase mostly contributed to PDF from 0 to 20 {\AA} whereas crystalline phases dominated that beyond 20 {\AA}. The short-range atomic strains exhibited two regions for C–S–H: I) plastic deformation (0-10 MPa) and II) linear elastic deformation (>10 MPa), whereas the long-range deformation beyond 20 {\AA} was similar to that of Ca(OH)2. Below 10 MPa, the short-range strain was caused by the densification of C–S–H induced by the removal of interlayer or gel-pore water. The strain is likely to be recovered when the removed water returns to C–S–H.",
keywords = "X-ray methods, calcium silicate hydrate, deformation, portland cement",
author = "Sungchul Bae and Hyeonseok Jee and Manabu Kanematsu and Ayumi Shiro and Akihiko Machida and Tetsu Watanuki and Takahisa Shobu and Hiroshi Suzuki",
year = "2018",
month = "1",
day = "1",
doi = "10.1111/jace.15185",
language = "English",
volume = "101",
pages = "408--418",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
number = "1",

}

Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress. / Bae, Sungchul; Jee, Hyeonseok; Kanematsu, Manabu; Shiro, Ayumi; Machida, Akihiko; Watanuki, Tetsu; Shobu, Takahisa; Suzuki, Hiroshi.

In: Journal of the American Ceramic Society, Vol. 101, No. 1, 01.01.2018, p. 408-418.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress

AU - Bae, Sungchul

AU - Jee, Hyeonseok

AU - Kanematsu, Manabu

AU - Shiro, Ayumi

AU - Machida, Akihiko

AU - Watanuki, Tetsu

AU - Shobu, Takahisa

AU - Suzuki, Hiroshi

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Despite enormous interest in calcium silicate hydrate (C–S–H), its detailed atomic structure and intrinsic deformation under an external load are lacking. This study demonstrates the nanostructural deformation process of C–S–H in tricalcium silicate (C3S) paste as a function of applied stress by interpreting atomic pair distribution function (PDF) based on in situ X-ray scattering. Three different strains in C3S paste under compression were compared using a strain gauge, Bragg peak shift, and the real space PDF. PDF refinement revealed that the C–S–H phase mostly contributed to PDF from 0 to 20 Å whereas crystalline phases dominated that beyond 20 Å. The short-range atomic strains exhibited two regions for C–S–H: I) plastic deformation (0-10 MPa) and II) linear elastic deformation (>10 MPa), whereas the long-range deformation beyond 20 Å was similar to that of Ca(OH)2. Below 10 MPa, the short-range strain was caused by the densification of C–S–H induced by the removal of interlayer or gel-pore water. The strain is likely to be recovered when the removed water returns to C–S–H.

AB - Despite enormous interest in calcium silicate hydrate (C–S–H), its detailed atomic structure and intrinsic deformation under an external load are lacking. This study demonstrates the nanostructural deformation process of C–S–H in tricalcium silicate (C3S) paste as a function of applied stress by interpreting atomic pair distribution function (PDF) based on in situ X-ray scattering. Three different strains in C3S paste under compression were compared using a strain gauge, Bragg peak shift, and the real space PDF. PDF refinement revealed that the C–S–H phase mostly contributed to PDF from 0 to 20 Å whereas crystalline phases dominated that beyond 20 Å. The short-range atomic strains exhibited two regions for C–S–H: I) plastic deformation (0-10 MPa) and II) linear elastic deformation (>10 MPa), whereas the long-range deformation beyond 20 Å was similar to that of Ca(OH)2. Below 10 MPa, the short-range strain was caused by the densification of C–S–H induced by the removal of interlayer or gel-pore water. The strain is likely to be recovered when the removed water returns to C–S–H.

KW - X-ray methods

KW - calcium silicate hydrate

KW - deformation

KW - portland cement

UR - http://www.scopus.com/inward/record.url?scp=85028766311&partnerID=8YFLogxK

U2 - 10.1111/jace.15185

DO - 10.1111/jace.15185

M3 - Article

AN - SCOPUS:85028766311

VL - 101

SP - 408

EP - 418

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 1

ER -