Use of natural zeolite aggregate in restoration lime renders

Author(s): Martin Vyšvařil, Patrik Bayer, Tomáš Žižlavský, Pavla Rovnaníková
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: 261-272
Total Pages: 12
Language : English

Abstract: Natural zeolites have been used with limes already in the Roman times and its perspectives of effective use as a pozzolanic additive to lime or cement composites were studied by a number of authors. The use of zeolitic materials for the production of lightweight aggregates in concrete is already known. However, the application of natural zeolite as an aggregate in lime renders (suitable for restoration and conservation) has not been investigated yet. In this study, the utilization of natural zeolite as lightweight aggregate in lime renders and natural hydraulic lime renders has been investigated therefore. The results revealed improved strengths of air lime renders with zeolite despite the fact, that the renders showed higher total porosity and water absorption than those with quartz aggregate. Increased porosity of renders resulted in improvement of their frost resistance and salt crystallization resistance. The analyzed renders with natural zeolite aggregate have a very good potential for practical applications because their properties are significantly enhanced, as compared with the common lime renders with quartz aggregate.

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