Microscopic methods for analysis of mortars from historical masonry structures

• Autorzy: Owsiak Zdzisława

Identyfikatory

DOI

10.24425/bpasts.2021.136042

• Języki publikacji: EN

Abstrakty

EN

The process of historical building conservation includes the repair of mortars eroded due to material and environmental factors. Identification of old mortar constituents is necessary to enable duplicating the material. Information on the binder and aggregate types and contents can be obtained from microscopic observation used in combination with instrumental methods. This paper presents the results of microstructure and mineral composition tests of mortars collected from the walls of thirteenth century buildings. A combination of techniques was used, which included X-ray diffraction, transmitted light optical microscopy and scanning electron microscopy with micro-area elemental composition analysis. The test results revealed porous lime and sand mortars with a binder-aggregate ratio often beyond the commonly adopted values. The mortars contained sand grains of up to 0.5 mm and larger pieces of limestone, flint, feldspar and brick. Transmitted light optical microscopy and scanning microscopy were found to be essential techniques for mortar characterization in existing buildings and structures.

Słowa kluczowe

EN

historical buildings; mortar; microscopic methods

PL

budynki historyczne; metody mikroskopowe; zaprawa

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2021
• Tom: Vol. 69, nr 1
• Strony: art. no. e136042
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Owsiak Zdzisława

• Kielce University of Technology, Aleja Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland

Bibliografia

• [1] C.J. Groot, P. Bartos, and J.J. Hughes, “Historic mortars: Characteristic and tests – concluding summary and state-of-the-art”, in Proc. Intern RILEM workshop, Advanced Concrete and Masonry Centre, University of Paisley, Scotland, 1999.
• [2] J. Elsen, “Microscopy of historic mortars – a review”, Cem. Conc. Res. 36, 1416‒1424 (2006).
• [3] L. Czarnecki and D. Van Gemert, “Scientific basis and rules of thumb in civil engineering: conflict or harmony?”, Bull. Pol. Ac.: Tech. 64(4), 665‒673 (2016).
• [4] K.M. Haneefa, S.D. Rani, R. Ramasamy, and M. Santhanam, “Microstructure and geochemistry of lime plaster mortar from a heritage structure”, Constr. Build. Mater. 225, 538–554, (2019).
• [5] G. Borsoi, A. Santos Silva, P. Menezes, A. Candeias, and J. Mirao, “Analytical characterization of ancient mortars from the archaeological roman site of Pisoes (Beja, Portugal)”, Constr. Build. Mater. 204, 597–608 (2019).
• [6] B. Middendorf, G. Baronio, K. Callebaut, and J. Hughes, “Chemical – mineralogical and physical – mechanical investigation of old mortars”, in Proc. Intern. RILEM workshop, Advanced Concrete and Masonry Centre, University of Paisley, Scotland, 1999, pp. 53‒60.
• [7] J.J. Hughes, S. Cuthbert, and P. Bartos, “Alteration textures in historic Scottish lime mortars and the implications for practical mortar analysis”, Proc. of the 7th Euro seminar on Microscopy Applied to Building Materials, Delft, 1999, pp. 417‒426.
• [8] E. Sandström-Malinowski, “Historic mortars revived”, Proc. of the Intern. RILEM-workshop Repair mortars for historic masonry, Delft, 2005.
• [9] L.B. Sickels, “Organics vs. synthetics: their use as additives in mortars”, Proc. of the ICCROM Symposium Mortars, Cements and Grouts used in the Conservation of Historic Buildings, Rome, 1981, pp. 25‒53.
• [10] J. Elsen, A. Brutsaert, M. Deckers, and R. Brulet, “Microscopically study of ancient mortars from Tournai (Belgium)”, Mater. Charact. 53, 289‒295 (2004).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).