Abstract
Frost is one of the main degradation processes affecting historic buildings in cold environments. Lime mortar is particularly sensitive to degradation by freeze-thaw cycles due to its high porosity and low mechanical resistance. The aim of the present research is to assess the frost resistance of seven lime-based mortars to be used in repairs. Mortars with different binder composition and a traditional hydrophobic additive were tested. Specimens with three months of age were subjected to freeze-thaw cycles and the ageing action was evaluated by means of mechanical and physical measurements. Improved durability of lime-based mortars with hydraulic binders and linseed oil additive has been confirmed and the different mortar formulas may be promising for repairs according to specific environmental conditions.
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Acknowledgments
This study was supported by the Czech national project of the Ministry of Culture of the Czech Republic NAKI DF11P01OVV008 entitled “High Valuable and Compatible Lime Mortars for Application in the Restoration, Repair and Preventive Maintenance of the Architectural Heritage”.
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Křivánková, D., Nunes, C.L., Slížková, Z., Frankeová, D., Niedoba, K. (2019). High-Performance Repair Mortars for Application in Severe Weathering Environments: Frost Resistance Assessment. In: Hughes, J., Válek, J., Groot, C. (eds) Historic Mortars. Springer, Cham. https://doi.org/10.1007/978-3-319-91606-4_12
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DOI: https://doi.org/10.1007/978-3-319-91606-4_12
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