Results 21 to 30 of about 45,573,897 (286)
A remark on nano-particle stability of cement C-S-H gel
Open Physics, 2011 Abstract Hydrated pastes of ordinary Portland cement prepared with different water-to-cement ratios were investigated by using the small-angle neutron scattering technique in the region of Q ∈ (0.0045, 0.11) Å−1. Samples of cement pastes were subjected to non-standard hydration conditions using a mix with D2O, low RH, and water-to-cement
Ficker Tomáš +2 more
doaj +2 more sources
Study of acidic degradation of alkali-activated materials using synthetic C-(N)-A-S-H and N-A-S-H gels [PDF]
, 2022 Alkali-activated materials (AAMs) are usually recognized having better acid resistance compared to ordinary Portland cement (OPC), however, the detailed mechanism has not been well studied due to the complexity of raw materials and hardened matrix.
Zhang, Zuhua +13 more
core +1 more source
Creep of a C-S-H Gel: Micromechanical Approach [PDF]
International Journal for Multiscale Computational Engineering, 2010 Both clays and calcium silicate hydrates(the main hydration products of Portland cements) exhibit a microstructure made up of lamellar particles. The microscopic mechanism responsible for the macroscopic creep of such materials is often described as the relative sliding of the sheets.
Sanahuja, Julien, Dormieux, Luc
openaire +5 more sources
Nano-scale mechanics of colloidal C–S–H gels [PDF]
Soft Matter, 2014 Gels of calcium-silicate-hydrates (C-S-H) are the glue that is largely responsible for the mechanical properties of cement. Despite their practical relevance, their nano-scale structure and mechanics are still mainly unexplored, because of the difficulties in characterizing them in a complex material like cement.
Masoero, E. +4 more
openaire +4 more sources
Effect of hydration on the dielectric properties of C-S-H gel [PDF]
The Journal of Chemical Physics, 2011 The behavior of water dynamics confined in hydrated calcium silicate hydrate (C-S-H) gel has been investigated using broadband dielectric spectroscopy (BDS; 10−2–106 Hz) in the low-temperature range (110–250 K). Different water contents in C-S-H gel were explored (from 6 to 15 wt%) where water remains amorphous for all the studied temperatures.
Cerveny, Silvina +5 more
openaire +3 more sources
Adsorption and Diffusion of Na+, Cs+ and Ca+2 Ions in C-S-H and C-a-S-H Nanopores [PDF]
, 2018 Cementitious materials act as a diffusion barrier, immobilizing liquid and solidradioactive waste and preventing their release into the biosphere. The retention capability of hydratedcement paste and its main hydration product, C-S-H gel, has been ...
Iñigo Lopez, Arbeloa +3 more
core +2 more sources
, 2023 This study investigates the decomposition of alkali-activated materials (AAMs) in sulfuric acid solution. Four sodium-containing calcium aluminium-substituted silicate hydrate (C-(N)-A-S-H) and aluminosilicate hydrate (N-A-S-H) gels with designed Ca/Si ...
Zhang, Zuhua +6 more
core +1 more source
Quantitative study of hydration of C3S and C2S by thermal analysis. Evolution and composition of C-S-H gels formed [PDF]
, 2010 This research is part of a European project (namely, CODICE project), main objective of which is modelling, at a multi-scale, the evolution of the mechanical performance of non-degraded and degraded cementitious matrices.
Baroni, Fulvio +21 more
core +1 more source
Acceleration of M-S-H gel formation through the addition of alkali carbonates [PDF]
, 2019 The varied properties of different cements enable the cement industry to shift towards the manufacture of application-specific cements rather than a general-purpose binder.
Li, A. +6 more
core +4 more sources
Materiales de Construccion, 2010 In this work, and in order to bring together the atomistic and colloidal viewpoints, we will present a Monte Carlo computational scheme which reproduces the colloidal packing of nano-spherical crystalline tobermorite-like particles. Different Low Density
R. González-Teresa +3 more
doaj +1 more source