Publications

Pro130

Investigating differences in the performance of lime-based mortars



Author(s): Ioanna Papayianni, Vasiliki Pachta, Emmanouela Berberidou, Maria Kalogirou
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: 1325-1332
Total Pages: 8
Language : English


Abstract: Lime based mortars in general, are commonly considered more suitable mortars for
repairing historic structures, in which hydrated lime dominates in the binding system. They
are of low strength capacity (lime:cement 1:1 is not commonly included) and consist of
hydrated lime (CL) or CL plus a hydraulic component, such as cement, pozzolan, calcined
clays or combination of them. Natural hydraulic lime (NHL) could also be considered as lime-
based binder since it contains hydraulic constituents, such as dicalcium silicate compounds.
It is well known that two mechanisms of setting and hardening go in parallel in these mixed-
type binding systems. In the paper a number of lime based mortars, such as pure CL 90, NHL
3.5 (according to EN 459), CL90-natural volcanic pozzolan (Poz.) (1:1) and CL90-Pozz-cement
(1:0.7:0.3) are monitored by implementing tests in fresh and hardened state. Physico-
chemical properties, mechanical and elastic characteristics have been recorded up to the age
of 180 days. Remarks concerning the behavior of them such as the capillary elevation, the
rate of strength development, shrinkage deformation are made. Generally, it seems that in
spite of some differences the test results of the properties of lime mortars with a hydraulic
component form a separate bundle from that of the pure CL 90 mortars. This shows that
many alternative compositions of lime-based mortars can lead to mortars of similar
performance.


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


>> You must be connected to view the paper. You can register for free if you are not a member