Evaluation of SiO2 nanoparticles as additive for lime mortars: changes in the microstructure and mechanical properties

Author(s): María del Mar Barbero-Barrera, Aranzazu Sierra Fernández, Duygu Ergenc , Luz Stella Gomez Villalba, Rafael Fort
Paper category: Proceedings
Book title: Proceedings of the 5th Historic Mortars Conference
Editor(s): José Ignacio Álvarez, José María Fernández, Íñigo 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: 121-131
Total Pages: 11
Language : English

Abstract: The use of additions, such as ceramic materials (crushed or finely ground bricks), with pozzolanic activity in lime-based mortars and plasters is an old practice in the field of construction. The reason is attributed to the pozzolanic reaction of these materials with the lime in the presence of water to generate different hydration products (aluminosilicates), which can contribute to enhance its strength and behaviour. Moreover, in recent times, nanoparticles (NPs) have been considered as a potential addition to boost the reactions in calcium hydroxide from mortars. Among different NPs, SiO2 NPs is considered a promising additive due to its action as nanofiller. In this research, effects induced by the addition of commercial nanosilica to aerial lime mortars containing different aggregates (standard siliceous sand and crushed and ground Roman ceramic) were studied. Specifically, the microstructural modifications produced by the presence of ceramic aggregates and nanoparticles into the lime-based mortars were studied related to the hydric properties and mechanical performance.

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