Lime Putties and Mortars
- 1 January 2008
- journal article
- research article
- Published by Taylor & Francis Ltd in Studies in Conservation
- Vol. 53 (1), 9-23
- https://doi.org/10.1179/sic.2008.53.1.9
Abstract
Based upon a scientific understanding of the reasons different properties develop, slaked little putty, aged slaked lime putty (which undergoes time-dependent changes upon storage in water) and putty from hydrated lime (i.e., soaked dry hydrate) are discussed, along with mortars made with them. The results of recent research on lime mortars are reviewed and interpreted focusing on the implications for the appropriate or inappropriate use of high-calcium lime mortar types in architectural conservation. The nanostructure and irreversible colloid nature of calcium hydroxide crystals in slaked lime putty, which determine the desirable working properties of putties, such as plasticity, density and viscosity, are modified through crystal coarsening triggered by drying. These properties are not fully regained upon subsequent reintroduction of water (e.g., putty preparation with hydrated little such as commercially available dry powder. The calcium hydroxide crystals in slaked lime putty may be further modified upon storage for extended time periods, also affecting the working properties and density. The nature of the crystals also influences the in water carbonation, and development of porosity and compressive strength of the mortar Additionally, the results of tri-axial compressive strength testing, as opposed to uni-axial compression, suggest that the limited strength of high-calcium lime mortar contributes to the durability of masonryThis publication has 9 references indexed in Scilit:
- Nanostructure and Irreversible Colloidal Behavior of Ca(OH)2: Implications in Cultural Heritage ConservationLangmuir, 2005
- Carbonation reaction of lime, kinetics at ambient temperatureCement and Concrete Research, 2005
- Liesegang pattern development in carbonating traditional lime mortarsProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2002
- Nineteenth century hydraulic restoration mortars in the Saint Michael's Church (Leuven, Belgium): Natural hydraulic lime or cement?Cement and Concrete Research, 2001
- Aging of Lime Putty: Effects on Traditional Lime Mortar CarbonationJournal of the American Ceramic Society, 2000
- Calcium Hydroxide Crystal Evolution upon Aging of Lime PuttyJournal of the American Ceramic Society, 1998
- Modelling lime mortar carbonationMaterials and Structures, 1994
- The Smeaton Project: Factors Affecting the Properties of Lime-Based MortarsAPT Bulletin, 1993
- The Colloidal Behavior of Lime1Industrial & Engineering Chemistry, 1928