A model for hydrated Portland cement paste as deduced from sorption-length change and mechanical properties

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Materials and Structures, 1, 6, pp. 509-520, 1969-04-01 A model for hydrated portland cement paste as deduced from sorptionlength change and mechanical properties Feldman, R. F.; Sereda, P. J. Materiaux et constructions.

Creep Mechanisms of Calcium–Silicate–Hydrate: An Overview of Recent Advances and Challenges

“…It should be noted that the above classification is somewhat arbitrary since differentiating capillary water and gel water is not easy in realistic circumstance. As further noted by Powers, the C-S-H consists mostly of fibrous particles with straight edges, where bundles of such fibers seem to form a cross-linked network, containing some more or less amorphous interstitial material (Powers 1958 (Feldman and Sereda 1968) Feldman and Sereda modified the P-B model by noticing that the C-S-H particle structurally resembles to a layered tobermorite-like crystal (denoted as F-S model) (see Fig. 1b).…”

Microstructure and Shrinkage Behavior of Autoclaved Aerated Con-crete(AAC) -Comparison of Vietnamese and Japanese AACs-

“…It is expected that the formation of menisci induces capillary tension (Eq. 4) to cause the shrinkage of the AAC according to the previous studies; many researchers identify capillary pressure as the principle shrinkage mechanism at high RH conditions, as menisci are established in that RH range (Feldman and Sereda 1968;Powers 1968;Hua et al 1995;Amberg and McIntosh 1952;Maruyama 2016).…”

“…Many researchers have reported that, in this interval, the shrinkage depends on the thickness of the adsorbed water layer on the solid surface (Bentz et al 1998;Feldman and Sereda 1968;Bazant 1988;Vlahinic et al 2009). The shrinkage driving force caused by the increase of surface free energy is dominant while the effect of capillary pressure may be small; the negligible effect of SRA on shrinkage of AAC in this range of RH (Fig.…”

Constitutive equation for concrete creep and shrinkage based on thermodynamics of multiphase systems

“…Some water molecules chemically bound in cement crystals, such as the interlayer hydrate, may have a lower binding energy than some adsorbed molecules [81,48]. Therefore they form part of evaporable water, We.…”