TY - JOUR
T1 - Replicating Medieval Wall Painting Plaster using the Hot-mix Technique
AU - Midtgård Madsen, Mette
AU - Seir, Torben
AU - Brajer, Isabelle
PY - 2021/5/19
Y1 - 2021/5/19
N2 - This paper describes attempts to replicate medieval plaster using hot-mixing, where quicklime, aggregate, and water are combined in a single exothermic process. The experimental study aimed to reproduce the structural characteristics of medieval plaster while making sample materials for conservation trials, rendering them more relevant and comparable with the medieval materials on which treatments take place. For wall painting conservation, similar capillarity and permeability are particularly important for trials focusing on consolidation, desalination, and cleaning. These characteristics are greatly influenced by the materials, working protocol, and curing conditions used in the replication process. Replicated plaster and plaster sampled from Gothic wall paintings were analysed to provide data regarding porosity, type of lime, aggregates, and binder/aggregate ratio using thin-section analyses, X-ray diffraction, porosity measurements, and mercury intrusion porosimetry. The comparative study showed a close match between one of the two recreated mortars and the original plaster.
AB - This paper describes attempts to replicate medieval plaster using hot-mixing, where quicklime, aggregate, and water are combined in a single exothermic process. The experimental study aimed to reproduce the structural characteristics of medieval plaster while making sample materials for conservation trials, rendering them more relevant and comparable with the medieval materials on which treatments take place. For wall painting conservation, similar capillarity and permeability are particularly important for trials focusing on consolidation, desalination, and cleaning. These characteristics are greatly influenced by the materials, working protocol, and curing conditions used in the replication process. Replicated plaster and plaster sampled from Gothic wall paintings were analysed to provide data regarding porosity, type of lime, aggregates, and binder/aggregate ratio using thin-section analyses, X-ray diffraction, porosity measurements, and mercury intrusion porosimetry. The comparative study showed a close match between one of the two recreated mortars and the original plaster.
KW - hot-mixed lime mortar
KW - medieval wall paintings
KW - mixing ratio
KW - replica production
KW - thin-section analysis
KW - porosity
KW - conservation trials
KW - XRD
KW - MIP
U2 - 10.1080/00393630.2020.1793597
DO - 10.1080/00393630.2020.1793597
M3 - Journal article
SN - 0039-3630
VL - 66
SP - 230
EP - 243
JO - Studies in Conservation
JF - Studies in Conservation
IS - 4
ER -