Print Email Facebook Twitter Influence of moisture content on the assessment of decay levels by micro-drilling measurements in wooden foundation piles Title Influence of moisture content on the assessment of decay levels by micro-drilling measurements in wooden foundation piles Author Mirra, M. (TU Delft Bio-based Structures & Materials) Pagella, G. (TU Delft Bio-based Structures & Materials) Gard, W.F. (TU Delft Bio-based Structures & Materials) Ravenshorst, G.J.P. (TU Delft Bio-based Structures & Materials) van de Kuilen, J.W.G. (TU Delft Bio-based Structures & Materials; Technische Universität München) Contributor Nyrud, Anders Q. (editor) Malo, Kjell Arne (editor) Nore, Kristine (editor) Alsen, Knut Werner Lindeberg (editor) Tulebekova, Saule (editor) Staehr, Efthymia Ratsou (editor) Bergh, Gabrielle (editor) Wuyts, Wendy (editor) Date 2023 Abstract In the historic city centre of Amsterdam (NL), the most widespread foundation system consists of wooden piles. With the aim of modelling and predicting remaining service life of these foundations and the piles in particular, one of the possible methods for collecting data and monitoring their condition consists of micro-drilling (MD) measurements. This work evaluates the reliability of MD measurements in identifying decayed portions and specific features of wooden foundation piles, considering different moisture content (MC) values. To this end, 24 segments were selected, sawn from wooden piles extracted from site, and having time in service (TS) of 2 to 294 years (with reference to 2021, the year of extraction). 240 MD measurements were conducted at varying MC values of 7% to 212%. The obtained MD profiles showed for all TS a slight decrease in drilling resistance when increasing MC. However, from the MD signals it is possible to reliably detect the areas affected by biodegradation phenomena (e.g. bacterial decay) along the drilling depth, regardless the MC of the segment or its gradient along the drilling depth. The present study contributes to research aiming at utilizing (in-situ) MD techniques for reliably assessing and quantifying decay and to be used in remaining service life planning of wooden foundation piles. Subject Wooden foundation pilesMicro-drillingMoisture contentBiodegradationService life prediction To reference this document use: http://resolver.tudelft.nl/uuid:f592cf54-f8b7-49c5-9b69-dc8816a799ee DOI https://doi.org/10.52202/069179-0530 Publisher World Conference on Timber Engineering (WCTE) ISBN 9781713873297 Source World Conference on Timber Engineering WCTE 2023: Timber for a Livable Future Event 13th World Conference on Timber Engineering 2023, 2023-06-19 → 2023-06-22, Oslo, Norway Series 13th World Conference on Timber Engineering, WCTE 2023, 7 Part of collection Institutional Repository Document type conference paper Rights © 2023 M. Mirra, G. Pagella, W.F. Gard, G.J.P. Ravenshorst, J.W.G. van de Kuilen Files PDF 069179_0530open.pdf 3.61 MB Close viewer /islandora/object/uuid:f592cf54-f8b7-49c5-9b69-dc8816a799ee/datastream/OBJ/view