Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Plastic deformation mechanism of calcium-silicate hydrates determined by deviatoric-stress Raman spectroscopy

Journal Article · · Cement and Concrete Research
 [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Creep of the cement matrix affects the structural stability of concrete. In Portland cements, the creep is largely controlled by the binding phase calcium-(aluminum-)silicate-hydrate, or C-(A-)S-H. This phase has a lamellar structure and under deviatoric stress aligns its c-axis with the principal stress. However, the limiting resistance to this reorientation is unknown at the nanocrystalline level. Small-angle X-ray scattering shows that the lamellae thickness decreases under 100's MPa deviatoric stress. Deviatoric stress Raman spectroscopy shows that there are two ways that this break-up can occur. If the material's silicate chains are cross-linked, then strain in Si–O bonds does not increase above certain stresses, indicating a relaxation adjacent to the Si–O bond. If the chains are not cross-linked, then the silicate chains are broken up by rastering against each other, introducing defects. These results show that the plastic deformation of C-(A-)S-H is relevant for Portland cement creep.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1839019
Alternate ID(s):
OSTI ID: 1782308
OSTI ID: 23206261
Journal Information:
Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 146; ISSN 0008-8846
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (47)

Understanding of bonding and mechanical characteristics of cementitious mineral tobermorite from first principles journal December 2010
Analysis of small-angle scattering of suspensions of organically modified montmorillonite: Implications to phase behavior of polymer nanocomposites journal November 2003
Stresses occurring during one-sided die compaction of powders journal November 1977
Experimental deformation of muscovite journal September 1993
A new model for a better understanding of the cohesion of hardened hydraulic materials journal October 1999
Raman spectroscopy of C-S-H, tobermorite, and jennite journal April 1997
The surface stability and morphology of tobermorite 11 Å from first principles journal June 2018
The calcium silicate hydrates journal February 2008
Nanoindentation investigation of creep properties of calcium silicate hydrates journal October 2013
Effect of temperature and aluminium on calcium (alumino)silicate hydrate chemistry under equilibrium conditions journal February 2015
Preferred orientation of calcium aluminosilicate hydrate induced by confined compression journal November 2018
The chemistry and structure of calcium (alumino) silicate hydrate: A study by XANES, ptychographic imaging, and wide- and small-angle scattering journal January 2019
Dynamic microstructural evolution of hardened cement paste during first drying monitored by 1H NMR relaxometry journal August 2019
Creep behavior of C-S-H under different drying relative humidities: Interpretation of microindentation tests and sorption measurements by multi-scale analysis journal June 2020
Synchrotron X-ray Raman scattering shows the changes of the Ca environment in C-S-H exposed to high pressure journal June 2020
Structure and morphology of calcium-silicate-hydrates cross-linked with dipodal organosilanes journal July 2020
Preferred orientation of calcium aluminosilicate hydrate compacts: Implications for creep and indentation journal May 2021
Simulation of scattering and phase behavior around the isotropic–nematic transition of discotic particles journal July 2012
A model for the C-A-S-H gel formed in alkali-activated slag cements journal October 2011
Unified nano-mechanics based probabilistic theory of quasibrittle and brittle structures: I. Strength, static crack growth, lifetime and scaling journal July 2011
A cohesive-frictional force field (CFFF) for colloidal calcium-silicate-hydrates journal December 2017
Structural characterization of C–S–H and C–A–S–H samples—Part II: Local environment investigated by spectroscopic analyses journal December 2009
Silicate Bond Characteristics in Calcium–Silicate–Hydrates Determined by High Pressure Raman Spectroscopy journal July 2020
Water Redistribution within the Microstructure of Cementitious Materials due to Temperature Changes Studied with 1 H NMR journal December 2017
Microstructure Determination of Calcium-Silicate-Hydrate Globules by Small-Angle Neutron Scattering journal February 2012
Densification of C–S–H Measured by 1 H NMR Relaxometry journal December 2012
Effects of static non-hydrostatic stress on the R lines of ruby single crystals journal December 1996
Basal slip and mechanical anisotropy of biotite journal January 1990
Nanoscale origins of creep in calcium silicate hydrates journal May 2018
Densification of the interlayer spacing governs the nanomechanical properties of calcium-silicate-hydrate journal September 2017
Aluminum-induced dreierketten chain cross-links increase the mechanical properties of nanocrystalline calcium aluminosilicate hydrate journal March 2017
Effects of CO 2 and temperature on the structure and chemistry of C–(A–)S–H investigated by Raman spectroscopy journal January 2017
Creep of Anisotropic Clay: Microplane Model journal April 1986
Hydrostatic compression of four corundum-type compounds: α-Al2O3, V2O3, Cr2O3, and α-Fe2O3 journal January 1979
The lattice strains in a specimen (cubic system) compressed nonhydrostatically in an opposed anvil device journal May 1993
The lattice strains in a specimen (hexagonal system) compressed nonhydrostatically in an opposed anvil high pressure setup journal May 1994
Nanogranular origin of concrete creep journal June 2009
Mesoscale texture of cement hydrates journal February 2016
Redefinition of the mode Gruneisen parameter for polyatomic substances and thermodynamic implications journal January 2002
Monte Carlo study of the isotropic and nematic phases of infinitely thin hard platelets journal August 1984
Texture and anisotropy journal July 2004
A new Guinier–Porod model journal May 2010
Nika : software for two-dimensional data reduction journal March 2012
Structural Features of C?S?H(I) and Its Carbonation in Air?A Raman Spectroscopic Study. Part I: Fresh Phases journal March 2007
Structural Features of C?S?H(I) and Its Carbonation in Air?A Raman Spectroscopic Study. Part II: Carbonated Phases journal March 2007
Developments in TEM Nanotomography of Calcium Silicate Hydrate journal April 2015
The influence of grain shape, friction and cohesion on granular compaction dynamics journal March 2007

Similar Records

Plastic deformation mechanism of calcium-silicate hydrates determined by deviatoric-stress Raman spectroscopy
Journal Article · Sun Aug 15 00:00:00 EDT 2021 · Cement and Concrete Research · OSTI ID:23206261

Uniaxial stress increases layer stacking disorder in calcium silicate hydrates with low calcium content
Journal Article · Mon Jan 23 19:00:00 EST 2023 · Acta Materialia · OSTI ID:1922037

Coordination environment of Si in calcium silicate hydrates, silicate minerals, and blast furnace slags: A XANES database
Journal Article · Sat May 15 00:00:00 EDT 2021 · Cement and Concrete Research · OSTI ID:23206336