NHL-based plasters and renders – Assessing the influence of mixing method on workability and hardened mortar properties

Author(s): Frowin Ruegenberg, Martin Schidlowski, Tobias Bader, Anja Diekamp
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: 1195-1214
Total Pages: 20
Language : English

Abstract: The term “workability” summarizes essential properties of plaster mortars that underlie subjective interpretation resulting in different approaches for its basic description. Generally, workability is influenced by composition and treatment of mortar, which affect the fresh mortar properties. A comprehensive overview of fresh and hardened mortar characteristics allows generating data, which can be used to predict durability qualities. Thus, within the present study two NHL-based recipes were evaluated with regard to the influence of different mixing methods. Varying the mixing time aims at simulating different workmanship methods on the building site. The properties that were investigated within this study cover mechanical and transport properties of NHL-based plaster mortars in order to estimate the influence of mixing method and water content, respectively, on fresh and hardened mortar characteristics. First results revealed that the interaction between mixing time, water content as well as type of hydrated lime affect the mentioned properties. The gained insights into the interaction between “workability” and resulting durability properties of NHL plaster mortars is beneficial for the understanding of modern and traditional NHL- based systems.

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