1. De Kogge – Doel 1
Condition assessment and implementation of the conservation process

2. Material condition assessment
Structural condition assessment
Conservation plan
Conclusion
Timetable
Pilodyn
Increment borer
Ash content
Preparations
Desalination
Impregnation
Future steps

3. Brede Værk, Denmark
SETTING SAIL: Understanding wood

4. 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

5. THE PILODYN
Metal pin of 40mm
Measuring depth of penetration
5 Measurements per plank
27 Frames
36 Planks
( ) ( )3
1000
1030ln7,256
cmg
x +-
=r
In total 315 pilodyn
measurements
DENSITY:
Gregory D. et al. (2007)

6. 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

7. THE INCREMENT BORER
Hollow auger bit (Ø 5 mm)
Measuring bulk density
2 measurements per plank
Dry weight/wet volume

8. 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

9. ASH CONTENT
Inorganic material
X- ray fluoresence (XRF)

10. 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

11. 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

12. 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

13. CONSERVATION PLAN
Warehouse SUEZ
Good location
5500 m³
Antwerp

14. CONSERVATION PLAN
Containers
Warehouse SUEZ

15. CONSERVATION PLAN
7 Climate boxes
Containers
Warehouse SUEZ

16. 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 friendlyNo chemical reactions
CheaperSmall workload
Available
Sugested products:
(Dastlik , Manuscript in preparation)
Safe

17. CONSERVATION PLAN
IMPREGNATION
PEG 2000
Stable temperature (20°C)
Increasing concentration (10% -> 85%)

18. PLAN OF CONSERVATION
Support frame
Reconstruction
Future steps:
Original shape
Surface treatment
Cleaning after impregnation
Controlled drying: 85% -> 50% RH
A brand new museum…

19. 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

20. CONCLUSION
Conservation facility
Desalination was started
Conservation plan
Preparations for PEG 2000
Condition assessment
Never ending story…

21. Thank you