Synthesis of Ca(OH)₂ Nanoparticles Aqueous Suspensions and Interaction with Silica Fume

Abstract:

In this work, interaction at ambient temperature between silica fume and artificially produced Ca(OH)₂ nanoparticles by two different methods was analyzed. Initial products and formed hydrated phases were characterized by several investigations including X-ray diffraction, thermal analyses, transmission and scanning electron microscopy. Synthesized Ca(OH)₂ nanoparticles appeared regularly shaped and hexagonally plated, with side dimensions from 200nm to less than 20nm. Characterization analyses showed that, by reducing particles dimensions, calcium silicate hydrate phase formation was evident already after 7 day of hydration and a nearly complete consuming of free Ca(OH)₂ after 28 days was observed. Besides, formed hydrate phases showed a highly wrinkled layer with marked crumple and rough-edge surfaces.

• Periodical: Advanced Materials Research (Volume 629)
• Pages: 482-487
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.629.482
• Online since: December 2012
• Authors: V. Daniele, G. Taglieri, A. Gregori
• Keywords: Ca(OH)₂, Calcium-Silicate-Hydrate (C-S-H), Characterization, Silica Fume (SF), X-Ray Diffraction (XRD)

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