Table 4 Results of thermal analysis—weight loss due to gypsum dehydration and carbon decomposition
From: Baroque stucco techniques of Baldassarre Fontana at Kroměříž Château
weight loss (%wt.) | (% wt.) by TG | (% wt.) by XRD-QPA | ||||||
|---|---|---|---|---|---|---|---|---|
50–200 °C | 200–600 °C | 600–850 °C | CaSO4.2H2O | CaCO3 | CaSO4.2H2O | CaCO3 | ||
STK 3 A | 17.35 | 1.22 | 3.64 | 81.8 | 8.30 | 87.7 | 9.8 | Core mortar |
STK 3B | 7.61 | 2.95 | 23.33 | 33.3 | 53.0 | 44.2 | 51.8 | |
STK 5 A | 6.23 | 2.64 | 23.31 | 27.2 | 53.0 | 32.3 | 59.7 | |
STK 14 | 3.03 | 2.18 | 17.16 | 14.5 | 39.0 | - | - | |
STK 3 C | 2.39 | 3.36 | 29.65 | 7.9 | 67.4 | 8.0 | 80.9 | Finishing stucco mortar |
STK 5B | 1.08 | 3.73 | 32.55 | 2.3 | 74.0 | 1.1 | 83.8 | |
STK 10 | 0.65 | 3.00 | 28.23 | 0.0 | 64.2 | 1.5 | 70.7 | |
STK 12 | 0.31 | 1.98 | 39.79 | 0.0 | 90.4 | - | 96.9 | |
STK 15 | 0.75 | 2.56 | 22.16 | 1.5 | 50.4 | - | - | |
STK 20B | 0.49 | 2.48 | 20.29 | 0.0 | 46.1 | - | 45.9 | |
