Comparative evaluation of the morphological and rheological characteristics of nanolime dispersions for the consolidation of architectural monuments

Author(s): Anastasia Michalopoulou, Elisavet Michailidi, Evangelos Favvas, Noni-Pagona Maravelaki, Vassilis Kilikoglou, Ioannis Karatasios
Paper category: Proceedings
Book title: Proceedings of the 5th Historic Mortars Conference
Editor(s): José Ignacio Álvarez, José María Fernández, Íńigo Navarro, Adrián Durán, Rafael Sirera
ISBN: 978-2-35158-221-3
e-ISBN: 978-2-35158-222-0
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 283-295
Total Pages: 13
Language : English

Abstract: Τhis paper focuses on the comparative evaluation of four different laboratory synthesized nanolime dispersions. The modification of the surface tension between the dispersion medium and nano-particles was realized by the addition of Triton –X100 (non-ionic surfactant) and the use of mixed polar dispersion mediums of 2-propnaol and a) distilled water or b) an O2 nano-bubbles (NBs) enriched aqueous dispersion medium.The morphological and mineralogical characterization of the nanoparticles produced was carried out by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) analysis. The stability of the dispersions was determined by UV-VIS spectroscopy.
The evaluation of the consolidation effectiveness was focused on the penetration ability of the nanodispersions. The modification of the surface tension with the addition of the non- ionic surfactant and the use of a mixed polar dispersion medium led to the reduction of the nanoparticles size and the absence of aggregates. Also, the mixed use of 2-propanol and distilled water enriched with NBs of O2 underlined that the relation between kinetic stability and the penetration ability of the nano-dispersions is not proportional.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00