Application of near infrared spectroscopy and multivariate data analysis for the evaluation of glue lines of untreated and copper azole treated laminated timber before and after ageing

Gaspar, Florindo; Lopes, João A.; Cruz, Helena; Schwanninger, Manfred; Rodrigues, José Carlos

doi:10.1016/j.polymdegradstab.2009.04.011

Cited by 21 publications

(12 citation statements)

References 36 publications

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“…They highlighted the advantage of NIR spectroscopy, sensitive to differences in hydroxyl groups in wood, for monitoring natural weathering. Application of NIR spectroscopy in safety assessment of glued laminated timber structures was presented by Gaspar et al . It was declared that NIR is a fast and useful technique to evaluate the degradation on the glue lines.…”

Section: Application Of Spectroscopy For Assessment Of Wood Degradatimentioning

confidence: 99%

Assessment of wood structural members degradation by means of infrared spectroscopy: an overview

Sandak

Riggio

2015

Struct. Control Health Monit.

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Timber structures can undergo alteration during their service life, which can be caused by mechanical, environmental or biological agents (bacteria, fungi and insects), because of the biological nature of the material. On site characterization of timber members is a very challenging task, especially assuming that both, the structure itself and material used for construction have to be evaluated. Current assessment procedures are limited to visual inspection, occasionally supported by a few instrumental analyses (such as wood moisture content measurement and drilling resistance tests). However, a clear tendency for the application of various non-destructive techniques is observed nowadays.The paper presents an overview on the current applications of infrared spectroscopy for the characterization of various alteration phenomena in wooden artefacts. A literature review is complemented by a series of results, reported from experimental campaigns carried out by the authors. The aim of the paper is to demonstrate the applicability of the proposed method for the analysis of different degradation processes occurring in timber members, with a special attention on wood aging, weathering, biotic decay by fungi and waterlogging.Examples of spectra evaluation as well as limitation of proposed methods are presented. Case studies including classification of decay type, analysis of the weathering dynamic and characterization of waterlogged wooden samples are briefly illustrated. Practical application of spectroscopy within timber structure assessment is considered as a very important supplement to the typical information collected during ordinary tests. Copyright

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Section: Application Of Spectroscopy For Assessment Of Wood Degradatimentioning

confidence: 99%

Assessment of wood structural members degradation by means of infrared spectroscopy: an overview

Sandak

Riggio

2015

Struct. Control Health Monit.

View full text Add to dashboard Cite

show abstract

“…Practical application of PCA toward structures in service was presented by Gaspar et al [28], where inspection and assessment of glued laminated timber was studied. PCA was used to distinguish between aged and non-aged samples and different preservative treatment levels.…”

Section: Principal Components Analysismentioning

confidence: 99%

Multivariate analysis of multi-sensor data for assessment of timber structures: Principles and applications

Sandak

2015

Construction and Building Materials

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“…Prediction models for the longitudinal tensile modulus and longitudinal tensile strength of impregnated wood were developed by Hedrick et al [47]. Promising results for NIR characterization of the mechanical stresses within a glue joints in laminated timber were reported by Gaspar et al [48].…”

Section: Prediction Of Strength and Mechanical Stressesmentioning

confidence: 99%

Estimation of physical and mechanical properties of timber members in service by means of infrared spectroscopy

Sandak

2015

Construction and Building Materials

View full text Add to dashboard Cite

Application of near infrared spectroscopy and multivariate data analysis for the evaluation of glue lines of untreated and copper azole treated laminated timber before and after ageing

Cited by 21 publications

References 36 publications

Assessment of wood structural members degradation by means of infrared spectroscopy: an overview

Assessment of wood structural members degradation by means of infrared spectroscopy: an overview

Multivariate analysis of multi-sensor data for assessment of timber structures: Principles and applications

Estimation of physical and mechanical properties of timber members in service by means of infrared spectroscopy

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