Bethesda Terrace : conditions assessment and evaluation of previous stone conservation treatments PDF
Preview Bethesda Terrace : conditions assessment and evaluation of previous stone conservation treatments
5j1'>" # >\\ -^ ^Sis? IP ^>,V^» m f'S- m: a,:<i> :1 M i^V: If.m!>i- UNIVERSITY^ PENNSYLVANIA UBKARIE5 BETHESDA TERRACE: CONDITIONS ASSESSMENT AND EVALUATION OF PREVIOUS STONE CONSERVATION TREATMENTS CHRISTOPHER JOHN GEMBINSKI A THESIS In Historic Preservation Presented to the Faculties of the University of Pennsylvania in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE 1998 jvu Su^rvnspr Supervisor Frank-GrMatero A. E. Charola Chair and Associate Professor of Lecturer in Historic Preservation Architecture Graduate Group Chair Frank G. Matero ^J< MA 6-2 15^^. 6: i^i\r\4 DwrviiiosnT I PEWSTLVAmAlI UBHAKTea I Table of Contents TableOFContents ' ListOF Figures "v ListOFTables v Acknowledgements vi INTRODUCTION 1 Objectives 4 PHASE CONDITIONS SURVEY AND PRELIMINARY RESEARCH I: CHAPTER PROJECT METHODOLOGY 6 1: Documentation 7 CHAPTER CONDITIONS SURVEY 11 2: Objective '''' DesignOFtheTerrace 12 Sandstone ConditionsATTHETerrace 15 Research FORConditions Survey Development 17 AreasSELECTEDforconditionssurvey 19 PhotographyAND DrawingsFORthe Survey 21 GlossaryOF ConditionsCategories 22 PreviousLong-termLoss OFStoneMaterial 23 Discoloration/Deposit 25 RecentActiveDeterioration 27 FissuresandDeformation 29 Replacement 30 FormattingtheSURVEY 32 Descriptive SymptomaticConditionsTerminology 35 46 Digitization PHASE ANALYSIS AND ASSESSMENT OF DECAY MECHANISMS AND PREVIOUS II: TREATMENTS CHAPTER COMPARATIVE ANALYSIS 48 3: Previoustreatments 48 Structuralmoisture penetration 50 Environment 52 Rate OFalterationANDdeterioration 54 CHAPTER FACTORS AFFECTING THE CONDITIONS OBSERVED 56 4: Location 59 ConstructionANDDESIGN 60 Surface finishingOFthe stone 63 StoneTYPEANDCOMPOSITION 66 PastINTERVENTIONS 75 CHAPTER 5: CORRELATION AMONG CONDITIONS 76 Previous LONG-TERM Loss 77 DifferentialErosion, RougheningandRounding 77 Breakage 79 Previous LONG-TERMLOSSANDSALTS 79 Previous LONG-TERM LOSSAND moisture PENETRATION 80 RecentActive Deterioration 82 Granulardisintegration 82 Delamination, flakingandcrusts 83 Active deteriorationANDSALTS 84 Overallactivedeterioration 85 CHAPTER 6: CHARACTERIZATION AND ANALYSIS OF UNTREATED AND TREATED STONE 87 PreliminaryOBSERVATIONS 91 TheArcade 91 RelativemoistureBYProtimeter™ readings 92 TheTerrace 95 ANALYSISOFTHE Sandstone 97 CapillaryAction 97 WaterPIPEABSORPTION 100 WaterAbsorptionBY Total Immersion 104 MeasurementOFTHEDryingIndex 107 Water Vapor Tfiansmission 109 ScanningElectronMicroscopy Ill PowderX-RAYdiffraction 112 IdentificationOFSoluble Salts 114 CHAPTER 7: EVALUATION OF PREVIOUS TREATMENTS 120 HONING 120 Consolidation 123 Compensation 124 CompositePatching 125 ReplacementINKind 135 CONCLUSIONS 137 RECOMMENDATIONS 140 AppendixA: Interviews 144 APPENDIXB: AutoCAD DRAWINGSOFTHEconditionssurveyOFTHEarcade 147 PREVIOUS LONG-TERM LOSS Drawing 1-CA Centralarcade 148 Drawing 1-EL Eastloggia 149 Drawing 1-NS North andsouth arcades 150 Drawing 1-WL Westloggia 151 III
The list of books you might like
