Formation and properties of C-S-H–PEG nano-structures

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. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1617/s11527-008-9439-x Materials and Structures, 42, 7, pp. 1003-1014, 2009 Formation and properties of C-S-H -PEG nano-structures Beaudoin, J. J.; Dramé, H.; Raki, L.; Alizadeh, R.http://irc.nrc-cnrc.gc.ca For m at ion a nd prope r t ie s of C-S-H -PEG na nost ruc t ure s NRCC-51315Beaudoin, J.J.; Dramé, H.; Raki, L.; Alizadeh, R. July 2009A version of this document is published in / Une version de ce document se trouve dans:Materials and Structures, 42, (7), pp. 1003-1014, DOI: 10.1617/s11527-008-9439-xThe material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Formation and Properties of C-S-H -PEG Nano-Hybrids, Beaudoin et al. FORMATION AND PROPERTIES OF C-S-H -PEG NANO-STRUCTURESJames J. Beaudoin*, Harouna Dramé, Laila Raki and Rouhollah Alizadeh Institute for Research in Construction, National Research Council of Canada M-20, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada * E-mail: jim.beaudoin@nrc-cnrc.gc.ca, Tel: 613-993-6749; Fax: 613-954-5984 AbstractResults of an investigation of the intercalation potential of polyethylene glycol (PEG) with synthetic and pre-treated C-S-H are reported. The partial intercalation of PEG molecules in the interlayer of C-S-H is discussed. The effective and strong interaction of PEG molecules with the C-S-H surface was shown using XRD, 13 C CP and 29 Si MAS NMR, and DTGA. The position and character of the 002 low angle XRD peak of C-S-H are affected by drying procedures and concomitant chemical treatment preceding intercalation and the reaction temperature. Recovery of the initial 002 position after severe dryin...

Effect of poly(diallyldimethylammonium chloride) on nanostructure and mechanical properties of calcium silicate hydrate

“…An additional test was performed using higher loads (matrix 2) in order to cover a greater region and, principally, to make marks that would be visible under SEM. In this case, a 2 × 3 points matrix was used up to a load of 512 mN (1,2,4,8,16,32,64,128,256, and 512 mN). Loading was applied linearly for 10 s, the maximal load (P max ) was then maintained for 5 s and unloading occurred over a further 10 s.…”

“…Considering the nanostructural interaction, the science is incipient, but it can be inferred that polymers alter the gel volume of the C-S-H formed and that these modifications make it more resistant to gas and liquid penetration, thus making it more durable [2].…”

“…The first C-S-H/polymer nanocomposites were successfully synthesized by Matsuyama and Young [3][4][5][6][7], followed by Mojumdar and Raki [8,9], Mojumdar et al [10] and Beaudoin et al [2]. The authors tested cationic (e.g.…”

Effect of partially hydrated cementitious materials on early-age shrinkage of ultra-high-performance concrete

“…Previous studies (Sant, 2009) reported a reduction in the SRA peak with time, which was attributed to a reduction in SRA concentration in the pore solution due to SRA uptake by hydration products. This can explain the difference between the 12 and 24 h TGA results, where the peak corresponding to SRA disappeared for the P-SRA mixture at 24 h while another peak was detected at 8008C, which corresponds to the SRA taken in the CSH gel (Beaudoin et al, 2008).…”

Cement hydration: the role of adsorption and crystal growth

“…An intimate structural description of C‐S‐H is needed to model crystallization and growth of this major phase involved in cement set and hardening, but structural information alone is not sufficient. A number of almost untouched issues include the structural incorporation of the organic additives , the role of impurities and disorder in the long‐term durability of these phases, and the possible structural role of C‐S‐H in the stabilization of hazardous or toxic species.…”