%0 Journal Article %A Monasterio, M. %A Gaitero, J.J. %A Erkizia, E. %A Guerrero-Bustos, Ana M. %A Miccio, L.A. %A Dolado, Jorge S. %A Cerveny, S. %T Effect of addition of silica- and amine functionalized silica-nanoparticles on the microstructure of calcium silicate hydrate (C-S-H) gel %D 2015 * ACADEMIC PRESS INC ELSEVIER SCIENCE, 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA %X In this work we study the influence of adding nano-silica (SiO2, Nyasil (TM)) and aminopropyl (-(CH2)(3)-NH2,) functionalized silica nanoparticles (Stoga) during the synthesis of calcium-silicate-hydrate (C-S-H gel). Characterization by solid state Si-29 NMR and ATR-FDR spectroscopy showed that the addition of both particle types increases the average length of the silicate chains in C-S-H gel being this effect slightly more important in the case of Stoga particles. In addition, C-13 NMR and XPS confirmed that the aminopropyl chain remains in the final product cleaved to silicon atoms at the end of the silicate chain of C-S-H gel whereas XRD measurements showed that this result in an increment in the basal distance compared with ordinary CSH. In addition, the dynamics of water within the pores of C-S-H gel was analyzed by broadband dielectric spectroscopy. We observed that water confined in C-S-H formed with the addition of nanoparticles is faster than that in plain C-S-H which can be related to a different porous structure in these materials. %@ 0021-9797 %K Dielectric properties %K Nanoparticles %K Water dynamics %K NMR %K Cement like materials %K C-S-H gel doi 10.1016/j.jcis.2015.02.066 %U http://hdl.handle.net/11556/218 %~ GOEDOC, SUB GOETTINGEN