Nano-workshop in Pöide
Prindi aruanneSündmuse kuupäev: 04.09.2016 - 08.09.2016
Täiendav info:
Title: „Nano-lime for conservation of stone, plaster and architectural surfaces“
Tutors: Jan Vojtechovsky (conservator, Pardubice University Conservation Department) and Karol Bayer (chemist, Dean of Pardubice University Conservation Department)
Coordinaator: Hilkka Hiiop
Time: 04.-08. september 2016
Place: Pöide Church, Saaremaa
The main topic of the workshops was a presentation and explanation of the use of lime nanomaterials in the conservation of calcareous porous materials - stone, architectural surfaces, building heritage (plaster, mural paintings, mortar, stucco) including practical demonstration as well as the theoretical background.
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Teose nimi: Pöide
Dateering: 13.sajand
Asukoht: Pöide vald Saare maakond
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juku_logo_1.jpg |
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International workshop „Nano-lime for conservation of stone, plaster and architectural surfaces“ FINAL REPORT Following report is compiled by the participants of the workshop. It is devided by 7 test-areas, which were selected for practical tests for nano-lime applications on different materials and conditions: 1. Wallpaintings (2 test-areas) 2. Limestone (2 test-objects) 3. Plasters (2 test-areas) 4. Brick (1 test-area) |
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Jan Vojtechovský, SURFACE CONSOLIDATION OF WALL PAINTINGS USING LIME NANO-SUSPENSIONS (Acta Polytechnica 57(2):139–148, 2017) Abstract. Within the field of the conservation of historical and cultural monuments, lime nanosuspensions are still a relatively new and unexplored material. This study examines their effect on the consolidation of architectural surfaces and, consequently, on wall paintings. Previous experiments showed that considerably deteriorated materials may not be adequately strengthened using only lime nano-suspensions. Therefore, the effects of their admixtures and gradual applications with silicic acid esters were examined. For verification, a simulation of a deteriorated lime-based paint layer was created on panels of plaster. The results of the consolidation were subsequently studied using objective (peeling test, water absorption capacity test, measuring colour changes using a mobile spectrophotometer) and subjective methods (comparison of visual changes to a set standard and by testing cohesion using a cotton swab). The microstructure of a consolidated paint layer was studied with a scanning electron microscopy. Tests proved that with either individual lime-alcoholic suspensions or with successive applications and mixtures of silicic acid esters it is feasible to achieve good consolidation results, whilst the alkoxysilane content of the agent indisputably increases the consolidating effect of these materials. |
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Lecture notes by Jan Vojtechovsky |
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Lecture notes by Jan Vojtechovsky |
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test area I Test spot no. 1. Choir, the wall painting (lime paint on plaster) around the eastern window faili autor: Martin Siplane
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test area I Test spot no. 2. Choir, the wall painting (lime paint on plaster) around the eastern window faili autor: Martin Siplane
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test area II Wall painting on the northern wall of the nave faili autor: Martin Siplane
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test area III The epitaph of Otto von Uexkyll. Detail no. 1 faili autor: Martin Siplane
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test area III The epitaph of Otto von Uexkyll. Detail no. 2 faili autor: Martin Siplane
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test area III The epitaph of Otto von Uexkyll. Detail no. 3 faili autor: Martin Siplane
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test area III The epitaph of Otto von Uexkyll. Detail no. 4 faili autor: Martin Siplane
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test area III The epitaph of Otto von Uexkyll. The penetration of the suspension in the stone. The pink colour indicates the calcium hydroxide particles on the stone. faili autor: Martin Siplane
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test area IV Baptismal font of Pöide Church faili autor: Martin Siplane
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test area IV Test area A. Baptismal font of Pöide Church faili autor: Martin Siplane
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test area IV Test area B. Baptismal font of Pöide Church faili autor: Martin Siplane
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test area V Historical plaster (southern wall, west vault of the nave) faili autor: Martin Siplane
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test area V Test area no. 1. Historical plaster (southern wall, west vault of the nave) faili autor: Martin Siplane
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test area V Test area no. 2. Historical plaster (southern wall, west vault of the nave) faili autor: Martin Siplane
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test area V Test area no. 3. Historical plaster (southern wall, west vault of the nave) faili autor: Martin Siplane
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test area V Test area no. 4. Historical plaster (southern wall, west vault of the nave) faili autor: Martin Siplane
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test area VI Test area A. Historical plaster (southern wall of the tower vault) faili autor: Martin Siplane
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test area VI Test area B. Historical plaster (southern wall of the tower vault) faili autor: Martin Siplane
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test area VI Test area C. Historical plaster (southern wall of the tower vault) faili autor: Martin Siplane
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test area VII Fired bricks in southwest corner of nave´s west vault faili autor: Martin Siplane
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