Durability aspects related to repointing of historic mortars with lime based mortar

Author(s): Caspar Groot, Rob van Hees, Ioanna Papayianni
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 644-651
Total Pages: 848
Language: English

Abstract: The durability of repointing repair in historic masonry is, apart from general parameters such as, environmental exposure, materials properties, design and maintenance, technically in particular determined by compatibility of the chosen repair material with the existing masonry and adequate on-site practices.
First, the paper discusses basic technical requirements stemming from the need of hygric and mechanical compatibility; these are placed in the context of durability of repointing in historic masonry. Further on, the effects of in-adequate on-site practices are discussed.
Most of the mortars applied in historic masonry are traditionally lime-based, with or without hydraulic components. For repair often lime, lime+pozzolans or natural hydraulic lime (NHL) are the most appropriate binders to be applied.
The durability of repair mortars using these binders is not always satisfying. In the paper some reasons for this unsatisfying behaviour and suggestions on how to deal with this are given.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00