Evaluation of the influence of nano-SiO2 and nano-Al2O3 on the physico-mechanical properties and microstructure of calcareous clay

Author(s): Eirini-Chrysanthi Tsardaka, Maria Stefanidou
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: 95-107
Total Pages: 13
Language : English

Abstract: The incorporation of nano-silica (NS) and nano-alumina (NA) in calcareous clay binder gave significant results, concerning the physico-mechanical properties and microstructure of the system. Two different proportions of nanoparticles were tested, 1.5wt% and 3.0wt%, in order to evaluate their degree of influence. Each nanoparticle modified the system, due to its different mechanism of action. NS seemed to stabilise calcareous clay specimens. The positive capillarity influence was the most important benefit. Calcareous clay with incorporated NS was the only system that completed the water capillary absorption test without collapse. On the other hand, NA did not benefit the physico-mechanical properties significantly in time, but maintained a low volume change. This limited volume change was not sufficient to emerge NA-composite as a favored system.

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