A Multi Sensor Approach for Prediction of Weathering Effects on Exposed Timber Structures

Abstract:

The goal of this work was an attempt to understand and model the combined effect of time, geographical location, exposition, and coating type on the physical-chemical mechanisms for wood weathering in structures. A series of wooden samples non coated and coated with top industrial coating has been exposed to natural weathering conditions in seven locations varying in climatic conditions, including whole Italy and southern part of Germany. The set of samples has been exposed for four years, collecting representative samples each year. Four exposition directions (North, South, East and West) were investigated. All the samples have been collected from the field site and stored in a dark and conditioned room including non-weathered reference samples. Measurements of the samples included: photogrammetry, near and mid infrared spectroscopy, color, gloss, roughness and elemental composition (X-Ray Fluorescence spectroscopy). Such a wide set of information collected has been used for investigation of the collective effect of the above mentioned variables on the surface properties of timber structures exposed to weathering. A dedicated algorithm has been tested for modeling the exposure time and service life prediction.

• Periodical: Advanced Materials Research (Volume 778)
• Pages: 794-801
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.778.794
• Online since: September 2013
• Authors: Jakub Sandak, Anna Sandak, Dusan Pauliny, Mariapaola Riggio, Sandro Bonfa, Simone Meglioli
• Keywords: Infrared Spectroscopy, Multi Sensor Approach, Service Life Prediction, Wood Surface Weathering

References

[1] S. M. Fufaa, B.P. Jelle, P.J. Hovde, P.M. Røvik, Coated wooden claddings and the influence of nanoparticles on the weathering performance, Progress in Organic Coatings 75 (2012) 72-78.

DOI: 10.1016/j.porgcoat.2012.03.010

[2] B.S.W. Dawson, A. Göttgens, G. Hora, Natural Weathering Performance of Exterior Wood Coatings on Pinus sylvestris and Pinus radiata in Germany and New Zealand, JCT Research 2, 7 (2005) 539-546.

DOI: 10.1007/s11998-005-0013-y

[3] Information on http: /www. nzwood. co. nz.

[4] X. Huanga, D. Kocaefea, Y. Kocaefea, Y. Bolukb, A. Pichettea, A spectrocolourimetric and chemical study on colour modification of heat-treated wood during artificial weathering, Applied Surface Science 258 (2012) 5360-5369.

DOI: 10.1016/j.apsusc.2012.02.005

[5] O. Ozgenc, S. Hiziroglu, U.C. Yildiz, Weathering Properties of Wood Species Treated with Different Coating Applications, BioResources 7, 4 (2012) 4875-4888.

DOI: 10.15376/biores.7.4.4875-4888