International Symposium Non-DestructiveTesting in Civil Engineering

International Symposium Non-DestructiveTesting in Civil Engineering (NDT-CE)
26.-28.09.1995, Berlin. Germany.

Proceedings Vol 1. Lectures Vol 2. Posters
Edited by G. Schickert, H. Wiggenhauser
1346 pages
ISBN 3-931 381-02-1
DGZfP
Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V.
Motardstraße 54 , 13629 Berlin, Germany
Telephone: + 49 (030) 386 29 911, Fax:.. /29 918,
Email: mail@dgzfp.de

NDT-CE Symposium Berlin 1995:
A Concluding Review
G. Schickert DGZfP, Berlin (D)

Contents
Volume I: Lectures
Volume II: Posters

	Page Vol I
Welcome Addresses	1
Committees	9
Scientific Programme Lectures	10
Posters	16
01 Setting the Scene
Assessment of Structural Stability of Prestressed Concrete by Non-Destructive Detection of Steel Fractures B. Hillemeier Technische Universitat Berlin, Berlin (D)	23
Applications of NDT to Basic and Applied Concrete Research S. Shah, E. Landis. Northwestem University, Evanston, IL (USA) University of Maine, Orono, ME (USA)	31
Non-Destructive Testing in Civil Engineering from Contractors Point of View B. Haselwander, C. Flohrer HOCHTIEF AG, Frankfurt a.M. (D)	39
02 Structures, Bridges
High Speed Testing Technologies for NDT of Structures D. Sack, L. Olson Olson Engineering, Inc., Golden, CO (USA)	43
Objective bridge condition assessment A. Aktan, D. Farhey, V. Hunt, A. Helmicki, D. Brown, S. Shelley University of Cincinnati, Cincinnati, OH (USA)	51
Quantification of bridge scour using impulse radar N. Davidson, I. Padaratz, M. Forde University of Edinburgh, Edinburgh (GB) Federal University of Santa Catarina, Florianopolis (BR) 61*
Radar Assessment of River-bed Scour at Bridges J. Bungey, S. Millard, C. Thomas, M. Soutsos, 191. Shaw University of Liverpool, Liverpool (GB)	69
03 Simulation
Electromagnetic and elastic wave scattering and inverse scattering applied to concrete K. Langenberg, R. Barmann, R. Marklein, S. Irmer, H. Muller, M. Brandfaß, B. Potzkai Universitat Gh Kassel, Kassel (D)	77
Non-destructive Testing of Concrete using Radar O. Buyukozturk, H. Rhim Massachusetts Institute of Technology (MIT), Cambridge, MA (USA)	85
Use of artificial neural networks in ground penetrating radar applications in pavement evaluation and assessment N. Attoh-Okine Florida International University, Miami, FL (USA)	93
Fast Geometric Algorithms for Tomographic Non-Destructive Evaluation P. Milanfar SRI International, Menlo Park, CA (USA)	101
04 Corrosion
Corrosion Monitoring Systems Installed in the Structures of the Great-Belt-Link-Projects - Monitoring as Part of a Multi-Barrier Protection Strategy P. SchießI, S. Rostam, M. Raupach** RWTH Aachen, Aachen (D), COWI-consult, Lyngby (DK), BIS Aachen, Aachen (D)	109
Rapid assessment of corrosion of in-situ reinforced concrete by analysis of transient response to galvanostatic pulse S. Millard, J. Bungey, K. Gowers University of Liverpool, Liverpool (GB)	121
In-situ monitoring of the efficiency of the cathodic protection of reinforced concrete by electrochemical impedance spectroscopy (EIS) W. Schwarz, F. Pruckner, J. Theiner, G. Nauef, J. Eri* ETH, Zurich (CH), Universitat Wien, Wien (A), Coating Int., Mjondalen (N)	135
Early-Stage Detection of Corrosion of Coated Reinforcement in Concrete S. Schlenzka, B. Hillemeier Technische Universitat Berlin, Berlin (D)	143
05 Moisture
A Microwave Moisture Sensor for Building Components W. Leschnik, C. Hauenschild, R. Knochel, F. Menke, T. Boltze TU Hamburg-Harburg, Hamburg (D) Christian-Albrechts-Universitat, Kiel (D)*	151
Monitoring of the moisture content of components from brickwall and sandstone with the aid of a microwave transmission method M. Rudolph, D. Schaurich F. Weise Bundesanstalt fur Materiaiforschung und -prufung (BAM), Berlin (D)	157
A new dielectric method to measure moisture in masonry H. Mouhasseb, J. Suhm, H. Garrecht, H. Hilsdorf Universitat Karlsruhe, Karlsruhe (D)	159
Investigation of moisture transport in concrete using a single-side nuclear magnetic resonance testing system B. Wolter, U. Netzelmann, G. Dobmann, P. Bloem Fraunhofer-lnstitut fur zerstorungsfreie Prufverfahren (IzfP), Saarbrucken (D) N. V. KEMA, Arnhem (NL)	167
Analytical Application of Microwave Reflexion in a GHz Range Determination of the Moisture Content in Loose Bulks J. Sevcik ALS GmbH, Weiden (D)	173
06 Magnetic and Electrical Methods
Nuclear magnetic resonance as a tool for the characterisation of concrete in different stages of its development B. Wolter, G. Dobmann	181
Fraunhofer-lnstiut fur zerstorungsfreie Prufverfahren (IzfP), Saarbrucken (D) Determination of moisture profiles in porous building materials by NMR L. Pel, K. Kopinga, H. Brocken Eindhoven University of Technology, Eindhoven (NL)	189
Determining of the concrete cover thickness and the bar diameter in reinforced concrete with a method of eddy current testing W. Ricken, G. Mehlhorn, W. Becker Universitat Kassel-GhK, Kassel (D)	197
Electromagnetic Testings on brick masonry X. Derobert, P. Cote, N. Lecocq, J. Cariou. LCPC, Bouguenais (F) ~LRPC de Rouen, Le Grand-Quevilly Cedex (F)	205
The Capacity of the Remanent Magnetism Method to Detect Fractures of Steel in Tendons Embedded in Prestressed Concrete H. Scheel, B. Hillemeier Technische Universitat Berlin, Berlin (D)	211
07 Interferometry
FE-Calculations and 3D-ESPI-Measurements of Mechanical and Thermal Stresses Induced to Machine Beds Made of Polymer Concrete E. Hack, U. Muhlematter, T. Steiger, F. Wittmann* Swiss Federal Laboratories for Materials Testing and Research, Dubendorf (CH), Fritz Studer AG, Steffisburg (CH), *ETH-Honggerberg, Zurich (CH)	219
Fracture Mechanics Investigations ot Concrete by Means of Laser Speckle Interferometry F. Rostasy, K. Hariri Technische Universitat Braunschweig, Braunschweig (D)	229
Crack Detection by Holographic Interferometry at the Surface of Mortar Specimens containing linear Steel Elements under Pull Out Loading D. Dalhuisen, P. Stroeven,J. Bien Delft University of Technology, Delft (NL) Wroclaw University of Technology, Wroclaw (PL)	237
Non-destructive Testing and Strain Measuring of Reinforced Concrete by means of Digital Shearography W. Steinchen, L. Yang, G. Kupfer, M. Schuth, H. Budelmann Universitat Gh Kassel, Kassel (D)	245
Study of the Interaction between Bricks and Mortar Joints through Electronic Speckle Pattern Interferometry C. Tiraboschi, L. Binda, M. Facchini, G. Roberti** Politecnico di Milano, Milano (l), Institute for System Engineering and Informatics, Ispra (Varese) (I), Politecnico di Milano, Milano (I)	253
08 Quality Control
Quality Assurance of Air Void Structures in Concrete A. Henrichsen, J. Vyncke Dansk Beton Teknik A/S, Hellerup (DK) CSTC, Limelette (B)	261
An in-situ NDT-method to detect incorrectly positioned dowel bars in carriageway slabs of concrete highways A. Rosch, A. Schaab Technische Universitat Berlin, Berlin (D), HOCHTIEF AG, Morfelden-Walidorf (D)	269
Reliability of Half-Cell Readings for Corrosion Detection H. Shaheen, O. Salam Building Research Center, Cairo (ET)	277
A Portable High Energy X-Ray Betatron S. Hubbard JME Ltd. Crown House, Lowestoft, Suffolk (GB)	279
09 Ultrasound I
Comparison of Pulse-Echo-Methods for Testing Concrete M. Krause7, R. Barmann2, R. Frielinghaus3, F. Kretzschmar4, O. Kroggel5, K. Langenberg2, C. Maierhofert, W. Muller4, J. Neisecke6, M. Schickert7, V. Schmitz4, H. Wiggenhauser1, F. Wollbold6 1BAM, Berlin (D), 2Universitat Gh Kassel, Kassel (D), 3Krautkramer, Hurth ([)), 4FhG-lzfP, Saarbrucken, Dresden (D), 5TH Darmstadt, Darmstadt (D), 6Universitat Dortmund, Dortmund (D), 7MFPA Weimar, Weimar (D)	281
Tomographic Imaging Concrete Structures F. Gheshlaghi, C. Santamarina, D. Wiese, M. Thomas, M. Polak, G. Caratin** University of Toronto, Toronto, Ontario (CDN>, MDC Geological Consultants Ltd. (CDN), Ontario Hydro, Toronto (CDN), **University of Waterloo, Waterloo, Ontario (CDN)	297
Ultrasonic crosshole testing on large concrete piles H. Gross, W. Brameshuber Bilfinger + Berger Bauaktiengesellschaft, Mannheim (D)	305
Ultrasonic resonance spectroscopy for concrete NDT D. Andrews, J. Blanchard, T. Stepinski, L. Ericsson* Instrumentation Innovation LTD, Cambridge (GB) University of Uppsala, Uppsala (S)	311
10 Building Dynamics
The Combined Use of Remote Laser Measurements and Simple Modal Analysis B. Ellis Building Research Establishment, Watford, Garston (GB)	319
Identification of Crack Parameters in Concrete Beams using Modal Test Data G. Eilbracht, M. Link Universitat Gh Kassel, Kassel (D)	327
Modal analysis of the Westend-Bridge in Berlin - Experiment and finite element analysis R. Cantieni, R. Rohrmann, Y. Deger, S. Pietrzko, W. Rucker EMPA, Dubendorf (CH) *Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	335
Optimization of Finite Element Models of Large Structures Based on Dynamic Test Results Y. Deger, A. Felber, R. Cantieni, S. Pietrzko EMPA, Dubendorf (CH)	345
11 Building Inspection
Infrared Thermography to Localise Anchors in Three-Layer Outside Walls M. Mangold, M. Friedmann, B. Rammelkamp Barg-Baustofflabor, Berlin (D)	353
Continuous NDT monitoring of historical monuments S. Heruc Delft University of Technology, Delft (NL)	361
Use of thermal measurement methods within moist building materials H. Stopp, P. Haupl, H. Fechner, J. Neue Fachhochsch u le Lausitz, Senften berg ( D) TU Dresden, Dresden (D)	365
Improving the interpretation of infrared thermography and ground penetrating radar used for non-destructive testing of civil engineering structures A. Robert, L. Baillon, C. Huet EPFL LMC, Lausanne (CH)	375
Dynamic analysis of heat insulation measurements O. Gutschker, H. Rogal3, A. Donath Technische Universitat Cottbus, Cottbus (D)	383
12 Ultrasound II
Detection of Reinforcing Bars Position and Evaluation of Diameter by Ultrasonic Pulse-Echo Technique A. Masnata, M. Sunseri, A. Failla Universita di Palermo, Palermo (I)	391
Applicability of ultrasonic frequency spectrum analysis to material testing of gypsum, cement and concrete M. Jonas, J. Neisecke Universitat Dortmund, Dortmund (D)	393
Identification of masonry by impact and ultrasonic tests A. Zambrano, P. Rota Rossi-Doria, M. Tommasini Instituto Conservazione Opere Monumentali, CNR, Lecce (I) C.N.D., Roma (I)	401
Towards SAFT-lmaging in Ultrasonic Inspection of Concrete M. Schickert Materialforschungs- und -prufanstalt (MFPA) an der HAB, Weimar (D)	411
Detection of Thickness, Voids, Honeycombs and Tendon Ducts Utilising Ultrasonic Impulse-Echo-Technique R. Jansohn, O. Kroggel, M. Ratmann Technische Hochschule Darmstadt, Darmstadt (D)	419
13 Soils, Piles, Subsurface Detection
The use of ground probing radar technologies for non-destructive testing of tubes D. Daniels, D. Schmidt ERA Technology, Leatherhead, Surrey (GB) IBP Pietzsch GmbH, Ettlingen (D)	429
Application of SASW Test in Underground Obstacle Detection V. Ganji, N. Gucunski, M. Maher Rutgers University, Piscataway, NJ (USA)	437
Dual-Energy Computerized Tomography in Compacted Soil R. Lopes, D. Braz, L. Motta COPPE/UFRJ, Rio de Janeiro (BR)	445
Non-destructive Testing of
Ground-Anchors of Bridge Structures F. Langebrake, D. Fuchs, H. Noller DMT-lnstitut fur Forderung und Transport, Bochum (D)	453
Seismic Tomography in Civil Engineering P. Cote, O. Abraham LCPC, Bouguenais (F)	459
14 Case Studies
Non-destructive testing of bridge, highway and airport pavements G. Weil EnTech Engineering, St. Louis, MO (USA)	467
Testing and Dynamic Analysis of the Damaged Pag Bridge Z. Simunic, G. Puz HIMK, Zagreb (HR)	475
Laboratory Impact Testing for determination of Lateral Stiffness and Axial Load in Rail from Flexural Vibrations J. Beliveau, S Fahey, T. Murray University of Vermont, Burlington, VT (USA) VPI&SU, Blacksburg, VA (USA)	485
Use of impulse radar for investigating the integrity of stone-masonry walls S. Chidiac, J. Rainer, L. Davis, B. Johnson** National Research Council, Ottawa, Ontario, Canpolar Inc., Downsview, Ontario Public Works & Government Services Canada, Ottawa, Ontario (CDN)	487
15 Impact Echo
Use of the Impact-Echo Method and Field Instrument for Non-destructive Testing of Concrete Structures M. Sansalone, W. Streett Co'rnell University, Ithaca, NY (USA)	495
Impact-echo response in ferrocement-polystyrene beaded concrete laminates B. Naji, R. Ravindrarajah, H. Chung* James Hardie Building Boards, Camellia (AUS) University of Technology, Sydney (AUS)	503
IMPACT-ECHO Method Used to Locate Defects in Concrete, Masonry, Wood and "In-Between" B. Dragunsky Universal Construction Testing, Highland Park, IL (USA)	511
Non-Destructive Testing Method of Concrete Using Impact Acoustics Y. Ito, T. Uomoto Sato Kogyo Co., Ltd., Tokyo (J) University of Tokyo, Tokyo (J)	513
16 Materials
Comparison of DIN/ISO 8047 (Entwurf) to Several Standards on Determination of Ultrasonic Pulse Velocity in Concrete S Popovics, K. Komlos, J. Popovics** Drexel University, Philadelphia, PA (USA) Institute of Construction and Architecture, Bratislava (SK) Northwestern University, Evanston, IL (USA)	521
Analysis of Concrete with Laser Induced Breakdown Spectroscopy (LIBS) H. Wiggenhauser, M. Salzmann, G. Wilsch, D. Schaurich Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	529
Determination of Chloride Diffusivity in Matured Concrete based on Electrical Conductivity Measurements Hardening Material O. Klinghoffer, E. Rislund Force Institute, Broendby (DK)	539
Thermal Characterization of Defects in Carbon Fibre Reinforced Plastics: Comparison of Some Inversion Procedures V Vavilov, D. Kourtenkov, E. Grinzato, P. Bison, S. Marinetti, D. Balageas* Tomsk Polytechnic University, Tomsk (RUS) Consiglio Nazionale Delle Ricerche CNR-ITEF, Padoa (I) *ONERA, Chatillon-Cedex (F)	551
17 Monitoring
System Monitoring by Ambient Vibration Analysis in Plant and Bridge Construction K. Beyer, E. Luz, K. Kerkhof* Buro fur Baudynamik, Stuttgart (D) Universitat Stuttgart, Stuttgart (D)	559
A corrosion monitoring system for steel reinforced concrete structures in civil engineering B. Wietek Corrosions-Meßsysteme, Innsbruck (A)	567
Automatic moisture content measuring and monitoring system based on Time Domain Reflectometry used in roadstructures J. Van der Aa, G. Boer Rykswaterstaat/DWW, Delft (NL)	575
Short-length fibre optic micro sensors for non-destructive assessment of the building material's and component's behaviour W. Habel, D. Hofmann, F. Basedau IEMB, Berlin (D)	583
18 Acoustic Emission, Electro Acoustic
Investigation of concrete structural and mechanical characteristics by acoustic emission method G. Muravin, L. Lezvinsky Margan Physical Diagnostics, Netania (IL)	597
Localization and Classification of Fracture Types in Concrete with Quantitative Acoustic Emission Measurement Techniques C. Grosse, H. Reinhardt, T. Dahm Universitat Stuttgart, Stuttgart (D) Universitat Frankfurt, Frankfurt a.M. (D)	605
Application of Acoustic Emission Technique to Detection of Concrete Cracking and Rebar Corrosion Z. Li, Y. Xi Hong Kong University of Science and Technology, Hong Kong (HK) Drexel University, Philadelphia, PA (USA)	613
Electro-Acoustic Testing on Cracks in Prestressing Elements G. Dierkes, L. Franke Technische Universitat Hamburg-Harburg, Hamburg (D)	621
19 Historical Monuments, Masonry
Investigation of stone masonry bridges using sonics, electromagnetics and impulse radar C. Colla, P. Das, D. McCann*, M. Forde University of Edinburgh, Edinburgh (GB) Highways Agency, London (GB) *British Geological Survey, Nottingham (GB)	629
Evaluation of Stone Masonry Weir Using GPR and Ultrasonic Pulse Velocity Technique V. Sharma, S. Suri, N. Chandrasekaran, A. Sthapak Central Soil & Materials Research Station, New Delhi (IND) Investigation of Sandstone - Stone Replacement	637
Material Compounds by Holographic Interferometry G. Kruger, J. Frick FMPA Baden-Wurttemberg, Stuttgart (D)	639
Measuring the assessment of vault bridges for their load carrying capacity K. Hellmich Amt der Burgenlandischen Landesregierung, Eisenstadt (A)	647
20 Radar
Evaluation of Pavement Thickness using Ground Penetrating Radar K. Maser, J. Kristiansen, W. Schellenberger, F. Fippinger** Infrasense Inc., Arlington, MA (USA), Phonix Pavement Consultants, Vejen (DK) Landesamt fur StraDenbau, Thuringen, Schleusingen (D) **Gesellschaft fur Straf3enanalyse, mbH, Kaiserslautern (D)	655
Application and Optimization of Impulse-Radar for Non-Destructive Testing in Civil Engineering C. Maierhofer, K. Borchardt, J. Henschen Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	663
Analysis of Radar Response on Subsurface Objects in Concrete by Simulation Technique S. Park, T. Uomoto, M. Yoshizawa University of Tokyo, Tokyo (J) Technology Center of Metropolitan Expressway, Tokyo (J)	673
Radar Tomography for Non-Destructive Testing F. Kong, T. By Norwegian Geotechnical Institute, Oslo (N)	681
21 IR-Thermography, Radiation
Infrared Inspection of external bonded CFPR-sheets T. Luthi, H. Meier, R. Primas, O. Zogmal Eidgenossische Materialprufungs- und Forschungsanstalt (EMPA), Dubendorf (CH)	689
Non-destructive Tests applied to multilayer in building materials. Numerical Simulation and experimental application to dynamic infrared thermography with synchronous detection F. Najar, J. Sicard Universite de Cergy, Cergy (F)	697
High Resolutionary Moisture Measurement in Building Materials with Gamma-Radiation D. Greubel, F. Hoyer Wilhelm-Klauditz-lnstitut, Braunschweig (D)	705
Non-destructive testing methods applied to bridge decks in order to localize the defects associated with the waterproof membrane C. de Bosset, A. Robert Boscomer Services SA, Grandevent (CH), EPFL LMC, Lausanne (CH)	713
22 Reinforcements
Determination of Reinforcing Bar Diameter and Cover by Analysing Traverse Profiles from a Cover Meter J. Alidred, J. Chua, D. Chamberlain* Protovale (Oxford) Ltd., Abingdon, Oxfordshire (GB) City University, London (GB)	721
Evaluation of Concrete Cover Thickness and Steel Bar Diameter: Interpretation of Leakage Flux Locus Curves with Neural Networks vs. Analytical Methods D. Hentschel, G. Dobmann, U Fiedler, E. Pridohl Fraunhofer-lnstitut fur zerstorungsfreie Prufverfahren, Saarbrucken, Dresden (D)	729
Combination of a Covermeter with a Radar System - an Improvement of Radar Application in Civil Engineering M. Pöpel, C. Flohrer HOCHTIEF AG, Frankfurt a. M. + Morfelden-Walidorf (D)	737
A prototype inductive scanning system for two-dimensional imaging of metal reinforcing components in concrete: system design and data visualization P. Gaydecki, K. Glossop, F. Burdekin UMIST, Manchester (GB)	745
23 Conclucding Reports, Perspectives
New aspects of non-destructive testing of concretes I. Shkolnik, L. Millstein Trade Technology and Licensing Transfer Int. Corp., Deerfield, IL; Flint, Ml (USA)	753
NDT-CE Symposium Berlin 1995: A Concluding Review G. Schickert DGZfP, Berlin (D)	757
Authors Index XXV Subject Index XXX
Volume II Posters	Page Vol II
P01 Acoustic Emission, Impact Echo
Acoustic Emission Applied to post-Strengthening of Steel Reinforced Concrete Structures with Pre-Tensioned Composite Laminates R. Nordstrom, M. Deuring EMPA, Dubendorf (CH), Dr. Deuring & Oehinger AG, Winterthur (CH)	777
Cracking process of rocks in lab tests predicted by correlation with ultrasonics, acoustic emission and computed tomography J. Couvreur, J. Thimus Universite Catholique de Louvain, Louvain-la-Neuve (B)	779
Acoustic Emission Analysis During In-Situ Loading Test of Prestressed Concrete Structures G. Kapphahn MFPA, Leipzig (D)	787
Influence of impulse spectrum on defect detection in post tensioned bridges J. Martin, M. Hardy, A. Usmani, M. Forde University of Edinburgh, Edinburgh (GB)	789
Impact-echo testing of highly refractory shaped bricks F. Kretzschmar Fraunhofer-lnstitut fur zerstorungsfreie Prufverfahren (IzfP), Dresden (D)	797
Acoustic Emission as a useful tool for reflecting cracking behaviour of concrete composites A. Moczko, A. Pszonka, P. Stroeven Technical University of Wroclaw, Wroclaw (PL) Delft University of Technology, Delft (NL)	805
P02 Building Dynamics, Soils
The ResCol-Method in Soil Dynamics W. Haupt Landesgewerbeanstalt Bayern, Nurnberg (D)	813
Assessment of Local Stiffness of Structures by Non-Destructive Testing S. Moossavi Nejad University of Westminster, London (GB)	821
Dynamic identification of foundation piles in soft-clay G. Oliveto, F. Di Martino, A. Nigro Universita di Catania, Catania (I)	829
Automatic Bridge Monitoring System Using Vibration Measurement W. Rucker, S. Said, R. Rohrmann, W. Schmid Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	831
Non-destructive testing of historical buildings by microseismics methods A. Di Tommaso, G. Pascale University of Bologna, Bologna (I)	839
Dynamic Methods for Detecting Cracks in Reinforced Concrete Members K. Ebert Technische Universitat Munchen, Munchen (D)	841
P03 Case Studies
Engineering Society Cologne: Its experience with NDT-methods in constructions G. Teodoru, J. Herf, H. Adam** VDI-Bausachverstandiger, Koln (D) Firma Tecnotest, Leverkusen (D) lngenieur- und Sachverstandigen Buro, Koln (D)	851
Localization of Containers for Destructive Charges Inside Bridge in Tabor with NDT Methods L. Hobst, L. Vitek Technical University of Brno, Brno (CZ)	859
Non-destructive testing of stone sculpture and details of architecture A. Zacharski NDT Laboratory, Warschau (PL)	865
Non-Destructive Testing Methods for Determining the Built-in Position of Anchoring Elements at Curtain Facades F. Weise, D. Arndt, K. Borchardt, E. Geyer, J. Henschen, M. Krause, M. Niedack-Nad Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	867
Dynamic Diagnostic of TV Towers G. Schroth, P. Osterrieder, B. Beirow Technische Universitat Cottbus, Cottbus (D)	877
Potential Measurements on Prestressed Concrete Bridges and Required AdditionaMnformations for a Durable Repair A. Volkwein Technische Universitat Munchen, Munchen (D)	887
Air voids, poor compaction and areas of low concrete strength detection in concrete by pulse velocity measurements A Rosch, B. Hillemeier, E. Porzig, M. Krause, C. Maierhofer Technische Universitat Berlin, Berlin (D) Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	895
NDT of Various Concrete of Nuclear Power Plants after Heating for Temperature until 800 °C M. Vagas, L. Nad, T. Javor Technical University, Kosice (SK)	903
Diagnosis and recovery of the damaged buildings in Sarajevo and Mostar D. Almesberger, M. Toncic "SER.CO.TEC.", Trieste (I)	911
P04 IR-Thermography
Infrared Detection of Failure Processes in Wood M. Luong Ecole Polytechnique, Palaiseau (F)	919
Infrared Thermography in Non-Destructive Testing: Achievements and Development Perspectives V. Storozhenko, S. Meshkov University of Radio Electronics, Kharkov (UA)	927
Chromatic alterations of ancient buildings brick in infrared thermographic analysis N. Ludwig, E. Rosina Universita degli Studi di Milano, Milano (I) Politecnico di Milano, Milano (I)	929
New insights into the use of infrared thermography in structural examinations for the preservation of historical monuments F. Zahorszki, K. Winter Merseburg (D)	937
P05 Material Properties
Concrete performance assessed by gas permeability of cover concrete A. Dinku, H. Reinhardt Universitat Stuttgart, Stuttgart (D)	939
The Combined Method of Strength Evaluation of Concrete in Structures J. Mierzwa University of Technical, Krakow (PL)	947
Early basic creep of High Performance Concrete B. Persson Lund Institute of Technology, Lund (S)	949
Determination of thermal conductivity of materials of the solids by thermal comparator's method with two-point probing of the surface A. Kalinin Siberian State Scientific Research Institute, Novosibirsk (RUS)	959
HF impedance measurements to determine electrical resistivity and dielectric properties of cement paste and mortars D. BurchJer, B. Elsener, D. Fluckiger, H. Bohni Eidgenossische Technische Hochschule, Zurich (CH)	961
The Use of Break-Off Test to Evaluate High Strength Concrete A. Di Maio, G. Giaccio, R. Zerbino LEM IT-CIC, La Plata (RA)	963
Influence of Water Absorptivity and Irradiation of Concrete to Change Ultrasonic and Resonance Dynamic Young s Moduls M. Al-Serori, T. Javor, L. Nad Technical University, Kosice (SK)	969
In-Situ Concrete Strength Estimation. Simultaneous Use of Cores, Rebound Hammer and Pulse Velocity A. Goncalves Laboratorio Nacional de Engenharia Civil, Lisboa (P)	977
A method for the rapid determination of the coefficient of permeability of the "covercrete" R. Torrent, G. Frenzer Management und Beratung AG "Holderbank", Holderbank (CH)	985
Comparative Analysis of Heat and Ultrasonic Methods in Control of Protective and Strengthening Coating Lamination V. Zagrebelny, V. Troizky E.O. Paton Electric Welding Institute, Kiev (UA)	993
P06 Moisture
A Capacitive Method for Measuring the Moisture Content in Envelope Parts of Building Structures R. Cerny, P. Semerak, J. Toman, P. Haupl Czech Techn. University, Praha (CZ) Technische Universitat Dresden, Dresden (D)	995
Results of an examination of the moisture distribution in walls of buildings under Arctic and Siberian conditions W. Bogoslowski, A. Waskowski, S. Schinin* Staatliche Bauuniversitat Moskau, Moskau (RUS) Sibirische Staatsakademie fur Transport, Novosibirsk (RUS)	1003
On-line water content monitoring in clay by means of microwave method and instrumentation J. Kalinski WILTECH Industrial Measurements, Warschau (PL)	1005
P07 Monitoring, Sensors
Longterm control of selected reactions of structures by telecontrolled datalogging systems W. Bernuth, R. Burkhardt, P. Schwesinger Hochschule fur Architektur und Bauwesen Weimar, Weimar (D) Ingenieur-Buro fur Bauwerkserhaltung GmbH, Weimar (D)	1007
Assessment of deformations during the hardening process of large concrete sections by means of fibre optic sensors W. Habel, D. Hofmann Institut fur Erhaltung und Modernisierung von Bauwerken, Berlin (D)	1013
On Applications of Heat Flux Sensors in Non-Destructive Testing S. Rudtsch, H. Rogat3 Technische Universitat Cottbus, Cottbus (D)	1019
Application of fibre-optic sensors for measurements and for damage detection on structures W. Habel, D. Hofmann
Institut fur Erhaltung und Modernisierung von Bauwerken, Berlin (D)	1025
P08 Radar, Electromagnetic Methods
Quality assurance of fresh concrete by radar techniques G. Van der Wegen, G. Bosmans Intron, Sittard (NL)	1033
Measurements of stresses in ceramics and cement with microwaves H. Dannheim, H. Hadrich, R. Ruckdaschel Universitat Erlangen-Nurnberg, Erlangen (D)	1041
Detecting Fractures of Reinforcement in Reinforced Concrete by Eddy Current Method R. Grimberg, D. Nour, A. Savin, A. Andreescu, S. Leitoiu Institute of Technical Physics, lassy (RO) Technical University of lassy, lassy (RO)	1047
Design and Calibration of a dielectric measurement cell for concrete with large grain heterogeneities L. Baillon, A. Robert, C. Huet EPFL LMC, Lausanne (CH)	1053
Super High Frequency Electromagnetic Diagnosis of Protective Coatings Quality O. Ljashchuk, Z. Nazarchuk National Academy of Science, Lviv (UA)	1063
P09 Reinforcements, Corrosion
In-situ Measurement of Prestressed Strands K. Ebert, K. F. Muller Technische Universitat Munchen, Munchen (D)	1069
Signal Analysis Methods for the Remote Magnetic Examination of Prestressed Elements G. Sawade, J. Straub, H. Krause, H. Bousack, G. Neudert, R. Ehrlich Forschungs- und Materialprufungsanstalt, Stuttgart (D) Forschungszentrum Julich, Julich (D) *Kraftwerks- und Anlagenbau AG (K A.B.), Pirna (D)	1077
Detection of Cracks and Corrosion in Prestressing Steel Tensile Members Using Magnetic-Field and SQUID-Sensors K. Schutt, J. Hinken, M. Klinger* Beratender Ingenieur, Langenfeld (D) F.I.T, Bad Salzdetfurth (D)	1085
Quality control of prestressed concrete bridges by crack detection with magnetic fluorescence of the prestressing wires H. Polster, R. Wens Institut fur Erhaltung und Modernisierung von Bauwerken, Berlin (D)	1089
Non-destructive Corrosion Monitoring of Reinforcing Steel in Concrete Using AC Impedance Method T. Matsumura, T. Kanazu Central Research Institute, Chiba (J)	1091
"Bit" Apparatus for Monitoring Underground Pipe-Lines R. Dzhala, B. Verbenets, O. Senyuk National Academy of Science, Lviv (UA)	1099
Investigations on galvanic interaction between steel reinforcement in chloride contaminated concrete J. Gulikers University of Technology, Delft (NL)	1107
The Monitoring of Underfilm Corrosion of Reinforcing Steels T. Tsukada, D. Scantlebury Kajima Technical Research Institute, Tokyo (J) UMIST, Manchester (GB)	1109
Optimization geometric parameters of pulse magnetizing system V. Matyuk, A. Strelyukhin Belarus Academy of Sciences, Minsk (BY)	1117
Spontaneous Patterns of Steel Reinforcement on the Surface of Reinforced Bridges O. Anton Technical University of Brno, Brno (CZ)	1125
P10 Ultrasonics
Non-Destructive Testing of Concrete and Asphalt Concrete Pavement R Sztukiewicz, P. Rydzewski University of Technology, Poznan (PL)	1127
Ultrasonic-impulse-echo-technique - advantages of an online-imaging technique for the inspection of concrete F. Wollbold, J. Neisecke Universitat Dortmund, Dortmund (D)	1135
Evaluation of Ultrasound Waves During Setting and Hardening of Concrete C. Grosse, H. Reinhardt Universitat Stuttgart, Stuttgart (D)	1145
Methods of restoring the acoustical images and their applications to Non-Destructive Testing in Civil Engineering V. Koshovyi National Academy of Science, Lviv (UA)	1153
The quality of measurement of ultrasonic speed into materials with great vibration damping P. Vityuk State Research Institute, Kiev (UA)	1157
Ultrasonic Measurement for the Determination of Strength Development of Hardening Concrete B. Kaßner, P. Frey, G. Gebauer, J. Oecknick* Cobet-lngenieurburo Prof. Gebauer & Prof. Kat3ner, Cottbus-Sielow (D) geo & soft international, Baar (CH), *E. Schwenk Baubedarf, Nienburg a.d. Saale (D)	1165
Ultrasonic pulse velocity for estimation of some characteristics of basalt concrete in Lesotho M. Lephoma C S I R. Pretoria (ZA)	1169
Application of ultrasound measurements for non-destructive testing of the residual cross section of cast iron supports H. Polster, C. Buwert, P. Herrmann Institut fur Erhaltung und Modernisierung von Bauwerken, Berlin (D)	1171
Non-Destructive Evaluation of Brick-Masonry Structures: Calibration of Sonic Wave Propagation Procedures S. Abbaneo, L Binda, M. Berra, A. Fatticcioni Politecnico di Milano, Milano (l) EN EL-C RI S. M ilano (l )	1173
Ultrasonic Measurement for the Prediction of the Stiffness Formation in Hardening Concrete F. Rostasy, P. Onken, K. Hariri Technische Universitat Braunschweig, Braunschweig (D)	1181
An Investigation of Frequency-Dependent Ultrasonic Attenuation in Concrete E. Landis, S. Shah* University of Maine, Orono, Maine (USA) *Northwestern University, Evanston, IL (USA)	1189
Ultrasonic imaging of defects in concrete components W. Hilliger DLR Braunschweig, Braunschweig (D)	1197
The development of non-destructive testing of concrete and reinforced concrete P. Krivosheyev, P. Vityuk State Research Institute, Kiev (UA)	1199
Investigation of the reasons of reinforced concrete posts destruction with the help of ultrasound R. Kinash State University Lviv Politechnic, Lviv (UA)	1207
Ultrasonic Method Application for Structure - Evaluation of High Temperature Treated Reinforced Concrete Elements D. Dimov, M. Mihowsky, A. Popov, T. Donchev* University of Architecture, Sofia (BG) Bulgarian Academy of Science, Sofia (BG) Higher Institute of MIA, Sofia (BG)	1213
A comparison of tests for assessing increasing strength ratio P. Castro, B. Lennon CCM - Center for Composite Materials, I\lewark, DE (USA)	1215
Thickness Measurements on Reinforced Concrete Components Applying Ultrasonic Superposition Techniques P. Kemnitz, U. Richter, W. Wappler Institut fur Energetik Leipzig GmbH, Dresden (D)	1217
P11 Special Interest Problems of Modelling Room Climate in Latvia P. Shipkovs, G. Kashkarova, A. Shipkovs, E. Hjorthol, B. Romen Latvian Energy Agency, Riga (LV) Institute of Physical Energetics, (LV) SINTEF, Trondheim (N)	1225
Radiation Density Gauge Model VUT IX J. Supcik, A. Martinik Technical University of Brno, Brno (CZ) AM SOFT, Brno (CZ)	1227
Assessment of remaining fatigue life of steel bridges assisted by adaptive NDT K. Brandes, J. Herter, R. Helmerich Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D)	1233
Utilization of Computerized Tomography in the Analysis of the Fatigue Test in Asphaltic Mixture R. Lopes, D. Braz, L. Motta COPPE / UFRJ, Rio de Janeiro (BR)	1241
Quality Control of Reinforced Concrete Structures by Holography J. Popkov, G. Machkovtsev FRATEX, Novopolotsk, Vitebsk Region (BY)	1249
Monitoring of the effectiveness of surface protection systems after repair measures using Multi-Ring-Electrodes P Schießl, W. Breit RWTH Aachen, Aachen (D)	1251
The Precise Volt-Second Area Method for the Thickness Measurement (VSM) V. Tkachenko, V. Brandorf, V. Kotliarov Scientific and Research Institute, Lviv (UA)	1259
Cross-Sectional Imaging of Building Constructions by new Non-Linear Tomosynthesis Techniques Using Imaging Plates and 60Co-Radiation 1267 U. Ewert, V. Baranov, K. Borchardt Bundesanstalt fur Materialforschung und -prufung (BAM), Berlin (D) * I nstitute of I ntroscopy, Tomsk (RUS)*
A Non-Destructive-Testing-Method to Detect Cracks in Structures P. Kalinke, T. Weber Technische Universitat Hannover, Hannover (D) Technische Universitat Dresden, Dresden (D)	1275
Investigation and Reconstruction of Historical Roof Trusses J. Adamek, Z. Bazant Technical University of Brno, Brno (CZ)	1283
Testing of passive and active solar building components A. Donath, O. Gutschker, H. Rogaf3' U. Maschke Technische Universitat Cottbus, Cottbus (D)	1291
Integral methods for thermal images analysis in defectometry problems S. Melnik University of Radio Electronics, Kharkov (UA)	1299
Contactless optical shapemetry on thebasis of quasiheterodyne processing of grid images with sinusoidal profile I. Kostin, G. Babitchev, A. Sivokhin, A. Sarkissov, I. Archipenkov Moscow State University of Civil Engineering, Moskau (RUS)	1305
Experimental study of composed soil-flexible culvert system R. El-Sakhawy, M. Mashhour, A. Haggag, N. El-Fawakhry Housing,Building and Planning Research Center, Cairo (ET) Zagazig University, El-Shrkia (ET)	1307
Proof load testing of plates, a non-destructive test-method of existing structures G. Spaethe Institut fur Erhaltung und Modernisierung von Bauwerken, Berlin (D)	1309
Automatic Adaptive Method for Testing Data Processing for Non-Destructive Testing in Civil-Engineering L. Gel'man, Y. Burau, V. Krytsyn SPU "Slavutich", Kiev (UA)	1311
Non-destructive Condition assessment of metal structures G. Machkovtsev FRATEX, Novopolotsk, Vitebsk Region (BY)	1319
The Setting of Cement Pastes followed up by the Vibrascope L. Arnaud, C. Boutin, G. Villain E.N.T.P.E., Vauix en Velin (F)	1323
Stress measurement by means of the magnetoelastic method H. Falkner, M. Laube, H. Wichmann Technische Universitat Braunschweig, Braunschweig (D)	1331
Integrity Testing of Concrete Surfaces using Neural Networks R. Begum, D. Chamberlain City University, London (UK)	1339

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| NDTnet |

International Symposium Non-DestructiveTesting in Civil Engineering (NDT-CE) 26.-28.09.1995, Berlin. Germany.

Contents Volume I: Lectures Volume II: Posters

01 Setting the Scene

02 Structures, Bridges

03 Simulation

04 Corrosion

05 Moisture

06 Magnetic and Electrical Methods

07 Interferometry

08 Quality Control

09 Ultrasound I

10 Building Dynamics

11 Building Inspection

12 Ultrasound II

13 Soils, Piles, Subsurface Detection

14 Case Studies

15 Impact Echo

16 Materials

17 Monitoring

18 Acoustic Emission, Electro Acoustic

19 Historical Monuments, Masonry

20 Radar

21 IR-Thermography, Radiation

22 Reinforcements

23 Conclucding Reports, Perspectives

Volume II Posters

P01 Acoustic Emission, Impact Echo

P02 Building Dynamics, Soils

P03 Case Studies

P04 IR-Thermography

P05 Material Properties

P06 Moisture

P07 Monitoring, Sensors

P08 Radar, Electromagnetic Methods

P09 Reinforcements, Corrosion

P10 Ultrasonics

P11 Special Interest

International Symposium Non-DestructiveTesting in Civil Engineering (NDT-CE)
26.-28.09.1995, Berlin. Germany.

Contents
Volume I: Lectures
Volume II: Posters