Track 4: This New World: Preservation technology and emerging issues within our historic buildings and built landscapes
APT Student Scholar Abstract
1 - Comparative Performance Evaluation of Coatings on Common Albertan Wood Species
Tuesday, September 25
10:30 AM - 12:00 PM
John Wolodko , Associate Professor – University of Alberta
6) Timber architecture, like at the Ukrainian Cultural Heritage Village and the log structures at Historic Dunvegan, represent the oldest buildings in the Province of Alberta. There are thousands of square feet of uncoated timber which deteriorate by UV, water, wind, ice, and biotic factors like fungi and insects. The specification of well-designed cyclical preventive maintenance and coating treatments could mitigate the costs associated with loss and replacement of original fabric.
The target of the project is to explore effective and low-content ( < 250 g/L) Volatile Organic Compound (VOC) coatings to prevent historic wooden buildings decay.
Laboratory characterization and measurements of four common Albertan wood species include Pine (Pinus contorta), Tamarack (Larix laricina), Spruce (Picea glauca), and Aspen (Populus tremuloides) treated with five different coatings (TWP 200, SIKKENS Cetol, Armstrong G-Clark, Linseed Oil (Remtech), and AUSON’s Pine Tar). The samples of a dimension of 3” x 6” x ½” are tested and compared with an untreated control group before and after accelerated weathering (Atlas-MTS UV Test Fluorescent, 800 hours, by 2 hours UV-B 313-irradiation and 18 min water spray cycles). Characterization tests include microscopy to identify the depth of penetration, colour measurements to quantify change over time, water vapor transmission test to determine the permeability of the wood coatings. Goniometry will determine the degree of a coating’s water repellency. X-ray photoelectron spectrometry (XPS) and Fourier-Transform-Infrared Spectroscopy (FTIR) may provide analytic chemical evidence of wood decay. Additionally, the laboratory tests will establish testing methodologies and characterization to be used during the second phase test wall.
- Upon completion particpantswill be able to describe different methods of wood and treatment testings.
- .Upon completion particpantswill be able todescribe general performance of different coatings.
- Upon completion particpantswill be able tocompare of coatings performance before and after weathering.
- Upon completion particpantswill be able to conduct different wood coating testings.