3. EXPERIMENTAL METHODS
3.3 Sample Collection and Their Description
In Table 3.2, a nomenclature for the samples was given. In the nomenclature, first letter showed the name of medrese: Sivas Gök Medrese (S) and Tokat Gökmedrese
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(T). Second letter showed the type of sample as tile body (B), tile mortar (TM), mortar (M), brick (Br), repair mortar (RM) and salt (S). For example, SB2 was the second tile body sample of Sivas Gök Medrese.
Table 3.2 Sample codes of the medreses and their descriptions
1st Part Place of Samples Sivas Gökmedrese S
* Mortar samples were taken from Tokat Gök Medrese in November 2010. It was not known whether they were original or repaired mortars.
** There were two brick samples which were taken in different years. SBr1 was
1st Space was mescit. Its dome was covered with glazed bricks and the surface of the mihrab was covered with mosaic tiles. The glazed bricks were the painted imitation tiles. The mosaic tiles of the mihrab were mostly lost. 2. Space was Dar-ül Kura. Its
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dome was covered with imitation glazed bricks. 3. and 4. Spaces were the side eyvans as North and South Sides. They were nearly in the same condition having imitation mosaic tiles together with the original ones. Efflorescence was observed in each wall of eyvans. Also, painted imitation tiles were detached. Samples were collected from 3. and 4. Spaces as North and South Eyvans (Figure 2.1).
Table 3.3 described the samples of Sivas Gök Medrese which were taken in 1973, 1997 and 2010. Tile and their mortar samples were collected from the ground of the courtyards in 1997. Therefore, it can be concluded that the samples were detached and fell down for some reason. Their duration on the ground was not known. The tile samples of Sivas Gök Medrese were still attacted to their mortars (SB1, STM1; SB2, STM2) (Table 3.3). A small brick sample was from 1973 which gave an idea about the original composition of the brick in Sivas Gök Medrese (SBr1).
Table 3.3 Deteriorated tile samples with their mortars collected from the soil ground in 1973 and 1997 in Sivas Gök Medrese
Sample
The tile fragment and its mortar from South Eyvan. Eggplant purple and
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Table 3.3 (Continued)
In 2010, the restoration studies were almost finished in Sivas Gök Medrese. Salt samples from the eyvan walls, powdered brick sample from the eyvan window and new restoration mortars between the original tiles were collected in Sivas Gök Medrese (Salt; SS1, SS2, SS3, SS4, SS5, SS6, SS7 and SS8, Brick; SBr2, Repair Mortars; SRM1 and SRM2) (Table 3.4).
Table 3.4 The description of salt, brick and mortar samples which were taken in Sivas Gök Medrese in November 2010. monument is not known. Backside of the tile was cone-shaped and embedded into the mortar.
Brick SBr1 Two small brick samples which were taken in pedestal of minaret in 1973.
Glazed
Brick SGM Piece of glazed brick sample from laboratory archive
68 of window frame. It was in powdered form. of window frame. It was behind the SRM1.
Figure 3.3 represents the locations of the salt and brick samples on the 1st wall of the South Eyvan. The salt samples were located on the lower part of the wall in which original and imitation tiles were not present but it seemed that the source of water was mostly on the upper side of the wall which was also affecting the original tiles together with the imitation ones.
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Figure 3.3 The location of salt samples on efflorescence zone and brick samples which were taken in 1st wall of South Eyvan in Sivas Gökmedrese.
70 3.3.2 Tokat Gök Medrese
In the field, the façade of the main eyvan was studied as shown in Figure 2.4. The façade of main eyvan was shown on the plan of Tokat Gök Medrese.
The plan was obtained from General Directorate of Pious Foundations in 2010.
In Table 3.5, the tile, glaze and mortar samples which were collected from the courtyard of Tokat Gök Medrese in 1997, were described. The tiles of Tokat Gök Medrese were mostly without their mortars (TB1, TB2, TB3, TB4, and TB5) except TB6 with its mortar TTM1.
Table 3.5 The description of some tile samples which were found in the courtyard of Tokat Gökmedrese in 1997.
Sample
Codes Description Photographs
TB1 Turquoise colored tile body fragments.
TB2 Turquoise colored tile body fragments.
TB3 Eggplant purple colored tile body fragments having the thickness were between 1,9-2,3 cm
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Table 3.5 (Continued)
TB4
Turquoise colored tile body fragments having the thickness between 1,48-1,56 cm. The glazes had cracks.
TB5
Eggplant purple colored tile body fragment having the thickness were between 2,3-2,4 cm. There
In Table 3.6, the samples which were collected from the main eyvan walls of Tokat Gök Medrese in 2010 were described.
Tokat Gök Medrese had visible local interventions on the wall of main eyvan. Small mortar samples were taken from there which their originality was not known (TM1,
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TM2, TM3, TM4 and TM5). Also small brick sample, a powdered brick and a detached tile samples were taken on the façade to see the effects of the interventions and also to analyze their deteriorations (TBr1, TBr2, and TB7).
Table 3.6 The description of some mortar, brick and tile samples which were collected from main eyvan walls of Tokat Gök Medrese-November 2010.
Sample
Codes Description Photographs
TM1
Mortar sample from the left side of the façade of the main eyvan. It was taken at the height of 130 cm.
There were powdered bricks behind the mortar.
TM2
Mortar sample from the left side of the façade of the main eyvan. It was taken at the height of ~120-125 cm. There were powdered bricks behind the mortar.
TM3
Mortar sample from the left side of the façade of the main eyvan. It
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Table 3.6 (Continued)
TM5
Mortar sample from the right side of the façade of the main eyvan.
They were broken off to the ground.
TBr1
Brick sample from the left side of the façade of the main eyvan. It was taken at the height of ~105 cm. It was on TM3.
TBr2
Powdered brick sample from the left side of the façade of the main eyvan. It was taken at the height of
~95 cm. It was behind TM3.
TB7
Detached tile sample from the left side of façade. It was taken at the height of ~200 cm.
The samples from the different periods were reflecting the intervention and restoration effects as well as the environmental effects on the two medreses. The results of the analyses were evaluated together.
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