Physical and mechanical characterisation of historic mortars. Application to the evaluation of the state of conservation


  • A. Magalhães Laboratorio Nacional de Ingeniería Civil, Lisboa
  • R. Veiga



historic mortar, test, compressive strength, capillarity, state of conservation


An understanding of the physical and mechanical characteristics of historic mortars is of vital importance in the selection of repair mortars for historic buildings. As a result, a need has arisen for test methods that can be used to assess those characteristics in irregular, friable samples.

The present paper discusses the results of the experimental characterization of historic Portuguese mortars. The test methods used to evaluate water resistance and compressive strength are described. The compressive strength values found for new mortars using the method proposed and the method specified in European standards are compared and the results used to draw conclusions on the potential of the new technique.

The correlation between the initial degree of deterioration determined by visual inspection and the experimental data is discussed.


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(1) Moropoulou, A.; Polikreti, A.; Bakolas, A.; Michailidis, P.: “Correlation of physicochemical and mechanical properties of historical mortars and classification by multivariate statistics”, Cem. Concr. Res., 33 (2003), pp. 891-898. doi:10.1016/S0008-8846(02)01088-8

(2) Veiga, M. R. et al.: “Methodologies for characterisation and repair of mortars of ancient buildings”, in Proc. International Seminar of Historical Constructions 2001, Guimarães, Portugal, Universidade do Minho, 2001, pp.353-362.

(3) Lanas J., Álvarez: “Masonryrepair lime-based mortars: Factors affecting the mechanical behaviour”, Cem. Concr. Res., 33 (2003), pp. 1867-1876. doi:10.1016/S0008-8846(03)00210-2

(4) Palomo, A.; Blanco-Varela, M. T.; Martínez-Ramírez, S.: “Historic Mortars: Characterization and Durability”, New Tendencies for Research, p. 20 (

(5) Moropoulou, A.; Bakolas, A.; Anagnostopoulou, S.: “Composite materials in ancient structures”, Cement and Concrete Composites 2005, 27, pp. 295-300. doi:10.1016/j.cemconcomp.2004.02.018

(6) Moropoulou, A; Bakolas, A; Bisbikou, K.: “Investigation of the technology of historic mortars”, Journal of Cultural Heritage 2000; 1 (1), pp. 45-58. doi:10.1016/S1296-2074(99)00118-1

(7) Groot, C.; Bartos, P.; Hughes, J.: “Characterisation of old mortars with a respect to their repair”, in Proc. 12th International Brick/Block Masonry Conference, Madrid (2000), p. 815-827.

(8) Santos Silva, A.; Ricardo, J.; Salta, M.; Adriano, P.; Mirão, J.; Candeias, A. E.: “Characterisation of roman mortars from the historical town of Mertola”, in proc. Int. Conf. Heritage Weathering and Conservation, Madrid (2006), pp.85-90.

(9) Santos Silva, A.; Paiva, M.; Ricardo, J.; Salta, M.; Monteiro, A. M.; Candeias, A. E.: “Characterisation of roman mortars from the archaeological site of Troia”, Mater. Sci. For., in press.

(10) Candeias, A. E.; Nogueira, P; Mirão, J.; Santos Silva, A., Veiga, R.; Casal, M. G.; Ribeiro, I.; Seruya, A. I.: “Characterization of ancient mortars: present methodology and future perspectives”, in Proc. Workshop on Chemistry in the Conservation of Cultural Heritage: present and future perspectives, Perugia, (2006), 4 pp. (

(11) Válek, J.; Veiga, R.: “Characterisation of mechanical properties of historic mortars – testing of irregular samples”, in: Proc. 9th International Conference on Structural Studies, Repairs and Maintenance of Heritage Architecture (STREMAH, 2005), University of Malta, Malta (2005), 10 pp.

(12) Veiga, M. R.; Magalhães, A. C.; Bosilikov, V. B.: “Capillary tests on historic mortar samples extracted from site. Methodology and compared results”, in Proc. 13th Int. Brick and Block Masonry Conference, Amsterdam (2004), 10 pp.

(13) European Committee of Standardization (CEN): “Methods of test for mortar for masonry – Part 18: Determination of water absorption coefficient due to capillary action of hardened rendering mortar”, Brussels, April 1999, EN 1015-18.

(14) European Committee of Standardization (CEN): “Methods of test for mortar for masonry – Part 11: Determination of flexural and compressive strength of hardened rendering mortar”, Brussels, August 1999, EN 1015-11.




How to Cite

Magalhães, A., & Veiga, R. (2009). Physical and mechanical characterisation of historic mortars. Application to the evaluation of the state of conservation. Materiales De Construcción, 59(295), 61–77.



Research Articles