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De Kogge – Doel 1 Condition assessment and implementation of the conservation process
Material condition assessment
Structural condition assessment
Conservation plan
Conclusion
Timetable
Pilodyn Increment borer
Ash content
Preparations
Desalination
Impregnation
Future steps
Brede Værk, Denmark
SETTING SAIL: Understanding wood
MATERIAL CONDITION ASSESSMENT
14 februari 2012 — Hier komt de footer-titel — © Onroerend Erfgoed
Pilodyn measurements
Density of the wood
Conservation plan
Excel spreadsheet
Ash content
Increment borer
THE PILODYN
Metal pin of 40mm
Measuring depth of penetration 5 Measurements per plank
27 Frames
36 Planks
( ) ( )3
10001030ln7,256 cmgx +-
=r
In total 315 pilodyn measurements
DENSITY:
Gregory D. et al. (2007)
14 februari 2012 — Hier komt de footer-titel — © Onroerend Erfgoed
PILODYN: Results
70% of the measured wood densities are below 400 kg/m³
Local measurements
Cumulated measurements versus density
Jensen et al. (2011), p 9 Cumulated measurments
THE INCREMENT BORER
Hollow auger bit (Ø 5 mm)
Measuring bulk density 2 measurements per plank
Dry weight/wet volume
THE INCREMENT BORER: Results
The measured wood densities are between 100 and 500 kg/m³
No density gradients
Density of planks and frames versus depth in wood
Jensen et al. (2011), p 12
ASH CONTENT
Inorganic material
X- ray fluoresence (XRF)
ASH CONTENT: Results
Sulfur (S) Iron (Fe)
Higher percentage in planks (3-18%) than frames (2-6%) Calcium (Ca)
Jensen et al. (2011), p 14
Ash content as a function of depth in the wood
STRUCTURAL CONDITION
Determining the mechanical damage (cracks,…)
Registering the preservation circumstances
K1-511
9 20 cm
1 27cm 2 111cm
4 72,5 cm 5 57 cm
Veel Fe uitbloeiïngen bij nagelgaten
3 Vezelig oppervlak 10 zijkant is schilferig
382 cm 7 nieten 35 cm 4 cm
CONSERVATION PLAN
1. Desalination
2. Impregnation of wooden fragments with PEG 2000
3. Cleaning after impregnation
4. Original shape
5. Support frame
6. Reconstruction
7. Surface treatment
8. Controlled drying
CONSERVATION PLAN
Warehouse SUEZ
Good location
5500 m³
Antwerp
CONSERVATION PLAN
Containers
Warehouse SUEZ
CONSERVATION PLAN
7 Climate boxes
Containers
Warehouse SUEZ
PLAN OF CONSERVATION
DESALINATION
Fe, Ca, S
5% PEG 400 + 5% Sodium dithionite + 2% diammonium citrate (Richards et al. 2011)
diethylene triamine pentaacetic acid (DTPA) (Phillips et al. 2010)
Greensand
Optional treatment
Demineralised water
Eco friendly No chemical reactions
Cheaper Small workload
Available
Sugested products:
(Dastlik , Manuscript in preparation)
Safe
CONSERVATION PLAN
IMPREGNATION
PEG 2000
Stable temperature (20°C)
Increasing concentration (10% -> 85%)
PLAN OF CONSERVATION
Support frame
Reconstruction
Future steps:
Original shape
Surface treatment
Cleaning after impregnation
Controlled drying: 85% -> 50% RH
A brand new museum…
TIMETABLE 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2032
Research archaeology and registration
3D model
Desalination
Support frame
Making the molds for reshaping of the wood
PEG 2000 impregnation upto 50%
PEG 2000 impregnation upto 85%
Cleaning surface
Reshaping of the wood and reconstruction
Surface treatment
Controlled drying upto 50% RH
Archaeology
Reconstruction
Conservation
CONCLUSION
Conservation facility
Desalination was started
Conservation plan
Preparations for PEG 2000
Condition assessment
Never ending story…
Thank you