Scholarly record
CHALCEDONITE-BASED REPAIR MORTARS APPLICABLE IN HISTORIC BUILDINGS - SALT CRYSTALLIZATION RESISTANCE
Abstract
Increasing demands on the thermal performance of the building envelope play a crucial role in the design of buildings in order to maintain a quality indoor climate with reduced energy consumption. In case of repair mortars development, the necessary thermal insulation improvement can be effectively achieved by using lightweight aggregates. However, the application of new materials to historical buildings might be problematic due to their incompatibility with materials originally used in the past. In this paper, two lime-based mortars have been prepared and studied in terms of their basic structural, thermal and mechanical properties with emphasis on the mechanical performance after salt crystallization. In terms of design, the first mortar mixture used silica sand as aggregate. In the second mixture, the sand was fully replaced by crushed chalcedonite. The samples were subjected to 10 wetting/drying cycles, immersed in NaCl solution and distilled water. The results confirmed that the application of porous chalcedonite aggregate caused significant increase in material porosity followed with the drop of thermal conductivity and compressive strength compared to the reference mortar with silica sand. On the other hand, residual compressive strength retained after the crystallization test exceeded the initial value before crystallization. Based on the results of the conducted experimental analyses it was concluded that the use of chalcedonite as aggregate in lime-based repair mortars might be beneficial due to the improved thermal insulation performance and resistance to salt crystallization.
Publication Impact Profile
- Captures
- Mendeley - Readers: 1
Publication details
References14
Schueremans, L., Cizer, O., Janssens, E., Serre, G., Van Balen, K., Characterization of repair mortars for the assessment of their compatibility in restoration projects: research and practice, Construction and Building Materials, vol. 25, pp. 4338-4350, 2011. DOI: 10.1016/j.conbuildmat.2011.01.008
Papayianni, I., Pachta, V., Stefanidou, M., Analysis of ancient mortars and design of compatible repair mortars: The case study of Odeion of the archaeological site of Dion, Construction and Building Materials, vol. 40, pp. 84-92, 2013. DOI: 10.1016/j.conbuildmat.2012.09.086
Bozkurt, T.S., Sayin, B., Akcay, C., Yildizlar, B., Karacay, N., Restoration of the historical masonry structures based on laboratory experiments, Journal of Building Engineering, vol. 7, pp. 343-360, 2016. DOI: 10.1016/j.jobe.2016.07.010
Vysvaril,, M., Pavlikova, M., Zaleska, M., Pivak, A., Zizlavsky, T., Rovnanikova, P. Bayer, P., Pavlik, Z., Non-hydrophobized perlite renders for repair and thermal insulation purposes: Influence of different binders on their properties and durability, Constr. Build. Materials, vol. 263, paper No 120617, 2020. DOI: 10.1016/j.conbuildmat.2020.120617
Boynton, R.S., Chemistry and technology of lime and limestone (2nd ed.), John Wiley & Sons, Inc., New York, 1980.
N. Davey, A history of building materials, Phoenix House, London, 1961.
Moropoulou, A. Bakolas, A., Anagnostopoulou, S., Composite materials in ancient structures, Cement and Concrete Composites 27, pp. 295-300, 2005. DOI: 10.1016/j.cemconcomp.2004.02.018
Cowper, A., Lime and Lime Mortars (first published in 1927 for the Building Research Station by HM Stationery Office, London), Donhead Publishing Ltd., Dorset, 1998.
Ward-Perkins, J.B., Roman Imperial Architecture, Yale University Press, New Haven and London 1981.
Pavlikova, M., Zemanova, L., Zaleska, M., Pokorny, J., Lojka, M., Jankovsky, O., Pavlik, Z., Ternary blended binder for production of a novel type of lightweight repair mortar, Materials, vol. 12, paper No 996, 2019. DOI: 10.3390/ma12060996
Faria-Rodrigues, P., Henriques, F.M.A., Current mortars in conservation: An overview, Restoration of Buildings and Monuments, vol. 10, pp. 609-622, 2004. DOI: 10.1515/rbm-2004-5901
Gonzalez-Sanchez, J.F., Fernandez, J.M., Navarro-Blasco, I., Alvarez, J.I., Improving lime-based rendering mortars with admixtures, Construction and Building Materials, vol. 271, paper No 121887, 2021. DOI: 10.1016/j.conbuildmat.2020.121887
EN 12370, Natural Stone Test Methods�Determination of Resistance to Salt Crystallization, European Committee for Standardization (CEN): Brussels, Belgium, 2020.
WTA Merkblatt 2-9-04/D, Sanierputzsysteme, Wissenschaftlich-Technische Arbeitsgemeinschaft fur Bauwerkserhaltung und Denkmalpflege e.V. Vertrieb: WTA Publications, 2005.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.