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Thermal and infrared spectroscopic characterization of historical mortars |
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| Authors: | Lilli Paama Ilkka Pitk nen Hannu R nkk m ki Paavo Per m ki |
| Affiliation: | a University of Tartu, Institute of Chemical Physics, 2 Jakobi Street EE2400 Tartu Estonia b University of Jyväskylä, Department of Chemistry, P.O. BOX 35 FIN-40351 Jyväskylä Finland c University of Oulu, Department of Chemistry, P.O. BOX 333 FIN-90571 Oulu Finland |
| Abstract: | The characterization of historical mortars was performed by thermal analysis (TG-DTG), simultaneous infrared spectroscopy (TG-FTIR) and inductively coupled plasma atomic emission spectrometry (ICP-AES). The samples were taken from St. John Church (Tartu, Estonia), built in the 13th–14th centuries. The analyses are important for the restoration of the church. In reality, mortar is a very difficult system, the lime is accompanied with different hydraulic components. TG-DTG analysis and FTIR methods can be used to identify various components of mortar and to observe the reactions associated with the controlled heating at 25–900°C in dynamic air and nitrogen atmosphere. The elemental composition of the acid-soluble components (ASC) was determined by using the ICP-AES techniques. |
| Keywords: | Acid-soluble components Historical mortars ICP-AES Infrared spectroscopy TG-DTG analysis |
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