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Mechanical properties of crystalline calcium‐silicate‐hydrates: comparison with cementitious C‐S‐H gels
Author(s) -
Manzano H.,
Dolado J. S.,
Guerrero A.,
Ayuela A.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200675359
Subject(s) - calcium silicate hydrate , silicate , calcium silicate , cementitious , hydrate , modulus , materials science , calcium , composition (language) , thermodynamics , chemistry , chemical engineering , chemical physics , mineralogy , crystallography , composite material , physics , organic chemistry , cement , engineering , linguistics , philosophy
This work explores from a theoretical viewpoint the mechanical properties of the most important hydration product present in cementitious environments, the so called C‐S‐H (calcium‐silicate‐hydrate) gel. The dependence of the bulk ( K ), shear ( G ) and Young's ( E ) modulus for the C‐S‐H crystals respect to its composition and the length of its silicate chains is analysed by lattice dynamic simulations with parameterised two‐body and three‐body potentials. Our simulations reveal that the mechanical properties of C‐S‐H crystals show a strong dependence on their composition. Nevertheless our calculated numbers systematically overestimate the experimental values for C‐S‐H gels. Only when the finite length of the silicate chains is taken into account this discrepancy disappears. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)