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DIMENSIONAL CHANGE OF UNRESTRICTED WOOD AT DIFFERENT LEVELS OF EQUILIBRIUM MOISTURE CONTENT Line drawings using AutoCAD were made when the samples were at 0% MC and at room temperature. Drawings were drawn using a scale of 10:1, for higher accuracy. All dimensions and grain orientations were measured and introduced into the Microsoft Excel spreadsheet. The following two predictions were done: (i) Case 1: calculations based on literature data of Pinus eliotta (Slash pine). [8] (ii) Case 2: calculations based on experimental results. Table 2 shows the data used for these tests. Table 2: Data used for pine computer program DATA USED FOR PINE SAMPLE TEST INITIAL TEMP.ºC INITIAL RH % FINAL TEMP.ºC FINAL RH% PUBLISHED DATA FOR TAN% RAD% LONG% FSP% CASE 1 CASE 2 17.0 0.0 15.1 100.0 7.6 7.91 5.4 3.73 0.1 0.31 30.0 Fig. 3 shows the final drawings, where the resulting diagrams for both Case 1 and Case 2 were superimposed onto the true scanned images of the pine sample. Fig. 3 – Results of computer analysis carried out on the pine sample 5.3.2. Test Limitations The samples were too small and therefore the margin of error in measurement results to be larger. There must have been greater error with the thickness measurements (c.11mm) when compared with those for the length (c.78mm) and the width (c.89mm). 5.4. Presentation and analysis of the computer procedure As can be seen from Fig. 3, the computer procedure is quite accurate. Although slightly different from published values, experimental results were not very significant considering the sample was quite small, and subjected to extreme conditions (from 0 to 31% MC). As expected, due to the difference between experimental and literature data (7.91-7.60% tangential value higher by 0.31%) the 40
WOOD SCIENCE FOR CONSERVATION OF CULTURAL HERITAGE predictions made using literature values resulted shorter by about 0.75%; experimental results gave slightly higher cupping than actually resulted. In general, results seemed promising although the computer procedure should be tested on more wood species. Samples containing preparation and paint layers should also be tested to simulate more closely the situation in panel paintings. References 1. Simpson, W., TenWolde, A. (1999): “Physical Properties and Moisture Relations of Wood”, Wood Handbook: Wood as an Engineering Material, Forest Products Laboratory, Madison: Ch 3, 3-8. 2. Ibid.: Ch 3, 3-5. 3. Hoadley, R.B., (1998): “‘Chemical and Physical Properties of Wood”, The Structural Conservation of Panel Paintings. Katleen Dardes, Andrea Rothe Eds, The Getty Conservation Institute, Los Angeles: 16. 4. Formosa.M., (2003): “A Study of the Physical and Mechanical Behaviour of the Wooden Supports of Two Paintings at the Wignacourt Museum, Rabat”. B.Cons (Hons) Thesis, Malta Centre for Restoration: 64. 5. Hoadley, (1998), op.cit.: 18 6. Ibid.:20. 7. Simpson and TenWolde, (1999), op.cit.:Ch 3, 3-8. 8. Ibid. 41
Page 1 and 2: Proceedings e report 67
Page 3 and 4: Wood science for conservation of cu
Page 5 and 6: SUMMARY Introduction ..............
Page 7 and 8: WOOD SCIENCE FOR CONSERVATION OF CU
Page 9 and 10: INTRODUCTION These proceedings of a
Page 13: (A) MATERIAL PROPERTIES
Page 16 and 17: SORPTION OF MOISTURE AND DIMENSIONA
Page 22 and 23: VIBRATIONAL PROPERTIES OF TROPICAL
Page 28 and 29: CREEP PROPERTIES OF HEAT TREATED WO
Page 34 and 35: MEASUREMENT OF THE ELASTIC PROPERTI
Page 36 and 37: ELASTIC PROPERTIES OF MINUTE SAMPLE
Page 38 and 39: 4. Results Young's modulus (10^4 Mp
Page 40 and 41: PREDICTION OF LINEAR DIMENSIONAL CH
Page 42 and 43: DIMENSIONAL CHANGE OF UNRESTRICTED
Page 46 and 47: AGEING OF WOOD - DESCRIBED BY THE A
Page 52 and 53: 90 30 0 3,0E-03 - 2,0E 2,0E-03 - 1,
Page 54 and 55: 4. Application HYGRO-LOCK INTEGRATI
Page 56 and 57: RESEARCH ON THE AGING OF WOOD IN RI
Page 58 and 59: RESEARCH ON THE AGING OF WOOD IN RI
Page 60 and 61: Xylarium Database RESEARCH ON THE A
Page 62 and 63: AGING WOOD FROM CULTURAL PROPERTIES
Page 64 and 65: AGING WOOD FROM CULTURAL PROPERTIES
Page 66 and 67: STRENGTH AND MOE OF POPLAR WOOD (PO
Page 68 and 69: STRENGTH AND MOE OF POPLAR WOOD ACR
Page 70 and 71: STRENGTH AND MOE OF POPLAR WOOD ACR
Page 72 and 73: PHOTODEGRADATION AND THERMAL DEGRAD
Page 79 and 80: ROMANIAN WOODEN CHURCHES WALL PAINT
Page 85 and 86: DISINFECTION AND CONSOLIDATION BY I
Page 87 and 88: 3. Results and discussion WOOD SCIE
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WOOD SCIENCE FOR CONSERVATION OF CU
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FUNGAL DECONTAMINATION BY COLD PLAS
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STUDIES ON INSECT DAMAGES OF WOODEN
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TERMITE INFESTATION RISK IN PORTUGU
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BIODETERIORATION OF CULTURAL HERITA
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4. Causes of biodeterioration WOOD
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DEGRADATION OF MELANIN AND BIOCIDES
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MOULD ON ORGANS AND CULTURAL HERITA
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RESEARCH STUDY ON THE EFFECTS OF TH
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4. Methodology WOOD SCIENCE FOR CON
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NON DESTRUCTIVE IMAGING FOR WOOD ID
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METHODS OF NON-DESTRUCTIVE WOOD TES
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MEASUREMENT AND SIMULATION OF DIMEN
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IN THE HEART OF THE LIMBA TREE (TER
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3. Conclusions WOOD SCIENCE FOR CON
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2. Materials and methods WOOD SCIEN
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3. Chemometrics WOOD SCIENCE FOR CO
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3. Results and discussion WOOD SCIE
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NIR SPECTROSCOPIC MONITORING OF WAT
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NUMERICAL SIMULATION OF THE STRENGT
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3. Methods and models WOOD SCIENCE
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SIMPLE ELECTRONIC SPECKLE PATTERN I
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5. Conclusions WOOD SCIENCE FOR CON
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Average r adiated presure field (dB
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EXPERIMENTAL AND NUMERICAL MECHANIC
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EFFECT OF THERMAL TREATMENT ON STRU
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The aims of this work are to: WOOD
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ultramarine [bad] titanium white [m
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4. Conclusions chrome yellow WOOD S
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Fig. 7 - A soaked lamella clamped i
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(D) CONSERVATION
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EUROPEAN TECHNICAL COMMITTEE 346 -
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THE WRECK OF VROUW MARIA - CURRENT
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ROMANIAN ARCHITECTURAL WOODEN CULTU
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RESSURREIÇÃO DE CRISTO - PANEL FR
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ON 18 TH- AND 19 TH- CENTURY SACRIS
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ON 18TH- AND 19TH- CENTURY SACRISTY
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DEFIBRING OF HISTORICAL ROOF BEAM C
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EXAMINATION AND CONSERVATION OF TWO
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EXAMINATION AND CONSERVATION OF TWO
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THE CONSEQUENCES OF WOODEN STRUCTUR
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CONSEQUENCES OF WOODEN STRUCTURES C
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WHAT ONE NEEDS TO KNOW FOR THE ASSE
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load (KN) Samples 6 5 4 3 2 1 WOOD
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STRUCTURAL BEHAVIOUR OF TRADITIONAL
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INVESTIGATION ON THE UTILIZATION OF
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3. Results and discussions WOOD SCI
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Abadlia ......................... 3
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ANNEX 1: FACTS ABOUT COST ACTION IE
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Keynote presentations WOOD SCIENCE
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