A composite membrane of the polymer, chitosan, and the silver-exchanged mineral phase, tobermorite, was prepared by solvent casting and characterised by scanning electron microscopy and Fourier transform infrared spectroscopy. The in vitro bioactivity, cytocompatibility and antimicrobial activity of the composite were evaluated with respect to its potential application as a guided tissue regene...

Cementitious materials are considered to be a waste form for the ultimate disposal of radioactive materials in geological repositories. We investigated by means of atomistic simulations the encapsulation of strontium-90, an important radionuclide, in calcium–silicate–hydrate (C–S–H) and its crystalline analog, the 9 Å-tobermorite. C–S–H is the major binding phase of cement. Strontium was shown ...

Despite advances in the characterization and modeling of cement hydrates, the atomic order in Calcium-Silicate-Hydrate (C-S-H), the binding phase of cement, remains an open question. Indeed, in contrast to the former crystalline model, recent molecular models suggest that the nanoscale structure of C-S-H is amorphous. To elucidate this issue, we analyzed the structure of a realistic simulated m...

Abstract In the present paper, structure as well solubility and thermodynamic data of synthesized Al‐tobermorite is discussed. 29 Si NMR XRD prove successful synthesis an with a ratio Al/(Al + Si) = 0.1. The aluminum incorporated in branching (Q 3 ) sites silicate chains. Solubility can be calculated from measured ionic concentrations storage aqueous solution, which show little variation over t...

As calcium silicate hydrate (C-S-H) is the main binding phase in concrete, understanding doping behavior of impurity elements it important for optimizing structure cementitious materials. However, most current studies focus on cement clinker, and mechanism hydrated not yet fully understood. The component complex, its very similar to that tobermorite mineral family. In this study, effects three ...