Pelcon runs a specialised laboratory for aggregate and concrete testing, covering numerous test methods. We are highly recognised within the fields of aggregate acceptance testing, concrete microstructure, air void structure and durability testing. Your specimens and samples will be treated professionally and fast.
We are internationally recognized for our extensive experience with air void analysis, petrographic analysis and production of flourescence impregnated thin sections and plane sections. One offspring of our continous R&D activities is to service testing laboratories with training and delivery of our specialized technical equipment.
Subjects of damage analysis in concrete:
- Alkali Silica Reaction (ASR)
- Chloride induced reinforcement corrosion
- Cracked concrete floors
- Curing deficiencies
- Delayed Ettringite Formation (DEF)
- Explosive fire spalling
- Fire damage
- Frost damages (in both young and mature concrete)
- Loss of strength due to non-dispersed silica fume
- Map cracking and scaling in trowelled floors
- Micro defects from slipforming
- Poor concrete mix design
- Poor joint quality
- Shrinkage cracks
- Thermo expansion
- Wrong casting and compaction techniques
Subjects of analysis of natural stones & building stones:
Cause of investigation
Crumbling of cladding panels
Expansion/loosening of tiles
Frost testing, resistance to salt crystallisation
Granite, limestone, sandstone
Petrographic and mineralogical characterisation
Staining of cladding stone
Granite, granodiorite, silicious limestone
Surface damage in paving stone
Surface detorioration of cladding stone
Tiles damage - scaling
Weak corners in paving stones
|Cause of investigation||Rock type|
|Crumbling of cladding panels||Limestone|
|Expansion/loosening of tiles||Granite|
|Frost testing, resistance to salt crystallisation||Granite, limestone, sandstone|
|Petrographic and mineralogical characterisation||Various|
|Staining of cladding stone||Granite|
|Sulphide reactions/expansions||Granite, granodiorite, silicious limestone|
|Surface damage in paving stone||Limestone|
|Surface detorioration of cladding stone||Granite, marble|
|Tiles damage - scaling||Granite, limestone|
|Weak corners in paving stones||Granite|
Pelcon was started the 1st of July 2004 by the companys Managing Director Peter Laugesen. From 1987 to 2004 Peter Laugesen worked in the concrete laboratory Dansk Beton Teknik A/S (eventually owned by NCC AB) doing research and testing - especially working with petrographic analysis of concrete.
In 2004 Dansk Beton Teknik underwent a strategic rationalisation. The companys laboratory activities was transfered to Peter Laugesen in the independent company Pelcon Materials & Testing ApS. Peter Laugesen's customers from Dansk Beton Teknik was officially recommended to follow this transfer and coorporate with Pelcon in the future.
Since the opening of the new laboratory facilities in Søborg (Denmark) 2004, Pelcon has continuosly been involved in more projects. Our main clients are counsellers and contractors in Denmark and Europe. Still we have been involved in projects in many parts of World (see References). We are proud to say that the majority of our clints have been recommended from previous clients.
Managing director Senior Geologist (M. Sc.): Mr. Peter Laugesen
Head of laboratory: Mrs. Anne Seidel Bisgaard
Senior Engineer (M. Sc., PhD.): Mrs. Tine Aarre
Civil Engineer (M. Sc.): Mr. Christian Knuth Gottlieb
Technician: Mr. Lars Olsen
Geologist (M. Sc.): Ms. Sara Edith Hoffritz
Administration: Mrs. Lone Balling Engelsen
Consultant: Mr. Bent Jensen
From time to time we also employ students in the laboratory.
Based on 30 years of experience comprising also in-situ condition assessment and QA/QC on construction sites, we are pleased to offer training of your staff, implement procedures and audit the production, thus improving your construction work with respect to:
- Better concrete
- Improved production quality
- Risk reduction
- Trouble shooting, if things go wrong.
The early stages
Before contractors initiate large civil engineering constructions, the technical specifications should be scrutinised to de-bug all technical hindrances and immiscibility. Pelcon is highly experienced in this exercise, improving the technical conditions for large and medium sized contractors. When combined with a risk assessment, identifying high-risk areas and specific focus points in association with potential/relevant precursors, the contractor markedly reduces his risks.
One prerequisite is selection of applicable materials, both with respect to fulfilling the requirements but also to ensure the desired fresh concrete features, which are so essential to the production teams. Aggregate improvement may prove relevant, e.g. based on crusher adjustments, as previously guided by PELCON.
It has become evident that investing in a thorough tailoring of actual concrete compositions, has lead to improved concrete quality, improved production speed and to marked reduction of unpleasant production flaws such as cracks, honeycombing, poor construction joints and noncompliant surfaces.
PELCON has the needed understanding and experience from the improving of numerous concrete compositions, sometimes triggered by changes of apparent minute details. Our strategy comprises:
- A well workable concrete ensuring compaction, bonding to reinforcement and form filling
- Where possible including the application of SCC
- Robustness, ensuring that minor batching variations are not detrimental
- Selection of aggregate gradation and grain characteristics that ensures a uniform distribution within the in-situ concrete, hence reducing the risk of local shrinkage and crack problems
- Composition and content of cement paste ensuring internal bonding, no internal bleeding and segregation
- Relatively low amount of cement to reduce risk of thermo cracks and hydration shrinkage cracks
- Possible addition of pozzolans to reduce risk of cracks and increase the chemical resistance
- The incorporation of an air void system of small and evenly dispersed air bubbles having a positive influence on several of the above issues
Implementation of a QA/QC system on the site, is not meant to disturb or annoy the production sections, but is essential to prevent problems in advance; by testing and evaluating all relevant aspects of the production cycle, from stockpile build-up to the final finishing of concrete surfaces. PELCON has been successful in this.
- Quality plans, work instructions and procedures
- Incorporation of traditional test methods for fresh and hardened concrete
- Advanced testing if relevant/required
- Training of laboratory personnel
- Audits of staff, results and actual procedures
»Testing of fresh concrete
- Traditional testing: Workability, temperature, density, air content
- Essential ‘new’ fresh concrete parameters’, e.g. air void structure, dispersion and micro workability if relevant/required
»Testing of hardened concrete
- Cast cubes/cylinders
- Core analysis, e.g. with respect to obtained microstructure and durability
»In situ surveillance
- Grade, surface structures, aspects etc.
- Thickness, cover-layer thickness
»Training of production teams
- Interplay of vibration and inner structure
- The cracking need of early moisture protection
- Hands-on casting
- Finding your own flaws
»Reporting, evaluation and implementation of needed changes
Pelcon has an extensive experience in the field of testing and analysis of building materials. As illustrated by the map we are also internationally engaged.
Larger QA/QC or Consultancy Assignments:
|2017-2018||Fjordforbindelsen at Roskilde Fjord|
|2017||TIRPITZ bunker museum at Blåvand|
|2016-||‘Sydhavn Genbrugscenter’ - Recycled concrete project|
|2016-2017||‘Pelican Self Storage’ - Recycled concrete project|
|2015-2016||‘Tinghøj fresh water tank’|
|2015-||‘Malaysia Square’, London|
|2015-||Nordhavn Branch – Extension of the Copenhagen Metro|
|2014-2015||GEM Grand Egyptian Museum|
|2013-2017||Cityringen – Extension of the Copenhagen Metro|
|2013-2016||Design & development of the concrete pavement for ‘Ophelia Square’, Copenhagen|
|2013-2015||Ohio River Bridge, USA|
|2012-2013||Strengthening of Bridges by grouting – Tyra West Platform, North Sea|
|2011-2015||Izmit Bay Suspension Bridge Project, Turkey|
|2011-2011||Initial rehab. of grouted connection – Siri Platform, North Sea|
|2010-2012||Muscat Int. Airport, Oman|
|2006-2007||Marmaray Project, Istanbul, Turkey|
|2005-2008||Copenhagen Distant Heating Tunnel|
|2003-2009||Malmö Citytunneln - Mini metro, Sweden|
|2002-2003||Quality Audits PAA Poland – Foundations for Rødsand Windmill Park|
|1999-2000||Quality Manager at HTA-BSB, New Athens International Airport|
|1998-2002||Copenhagen Metro, all structural parts|
|1996-1997||Øresund Connection, Bridge girders (pre-testing and FST)|
|1995-1999||Øresund Connection, Tunnel, all structural parts|
|1992-1995||Great Belt Connection, East bridge, all structural parts|
|1989-1992||Great Belt Connection, Tunnel, in situ cast parts|
|1989-1992||Great Belt Connection, West Bridge, all structural parts|
|1990-||Copenhagen Airport, Maldives Airport, Danish Airfields, Falkenberg Motorway|
The publication list represents only a small fraction of the investigations, analysis and reports produced by Peter Laugesen (Managing Director of PELCON) over the years. The selection of subjects for publication has been controlled both by duty of silence against clients, and by the key scopes of interest of Dansk Beton Teknik A/S.
- Laugesen, P.: Main Defects in High Performance Concretes, as Detected by Petrographic and Air void Analysis of Hardened Concrete. Dansk Beton Teknik A/S, 1991.
- Laugesen, P.: Petrographic Analysis - Potential and Limitation (in Danish). Dansk Beton Forening, November 1992.
- Laugesen, P.: Effective W/C Ratio of Cement Paste in Concrete, in Jan E. Lindqvist et. Al. (eds.) Proceedings of the Fourth Euroseminar on Microscopy Applied to Building Materials. Visby - Sweden, 1993
- Laugesen, P.: Do the Control Parameters Control ? - Do the Mixer Homogenise ? - and Can Silica Fume Be Dispersed ? (in Danish), Dansk Beton Forening, 1993.
- Laugesen, P.: Concrete Airvoid- and Micro structure Problems, eba. A Description of Possible Relationships Between NCR and the Production of Concrete Structures. Dansk Beton Teknik A/S 1994.
- Laugesen, P.: Silica Fume Clumps in Fresh Concrete (in Danish), Test Method DBT-LAB-46. Dansk Beton Teknik A/S 1994.
- Henrichsen, A. & Laugesen, P.: Monitoring of Concrete Quality in High Performance Civil Engineering Constructions, in S. Diamond et al.(ed): Microstructure of Cement Based Systems / Bonding and Interfaces in Cementitious Materials, MRS Volume 370, 1994, pp. 49-56.
- Laugesen, P.: Dispersability of Condensed Silica Fume (CSF), Standard Test Method, DBT-LAB-47. Dansk Beton Teknik A/S 1995.
- Laugesen, P.: Silica Fume Clumps in Condensed Powder and in Concrete (in Danish). Dansk Beton Teknik A/S, august 1995.
- Laugesen, P.: The use of petrography in QA/QC of concrete, in J. Elsen (ed.): Proceedings from 5th Euroseminar on Microscopy of Building Materials, Leuven - Belgium 1995.
- P. et al.: HETEK. Method for Test of the Frost Resistance of High Performance Concrete. State of the Art. The Danish Road Directorate, Report no. 55, 1996.
- Geiker, M.; Laugesen. P.; Pedersen, E.J.; Thaulow, N.; Goldman, P.; and Frederiksen, J.O.: HETEK. Method for Test of the Frost Resistance of High Performance Concrete. Supplementary research. The Danish Road Directorate, Report no. 86, 1996.
- Eriksen, K.; Geiker, M.; Grelk, B.; Laugesen. ; Pedersen. E.J.; Thaulow, N.; Goldman, P. and Frederiksen, J.O.: HETEK. Method for Test of the Frost Resistance of High Performance Concrete. Performance testing versus in situ observations. The Danish Road Directorate, Report no. 93, 1996.
- Henrichsen, A.; Laugesen, P.; Geiker, M.; Pedersen. J.; and Thaulow, N.: HETEK. Method for Test of the Frost Resistance of High Performance Concrete. Summary, conclusions and Recommendations. The Danish Road Directorate, Report no. 97, 1997.
- Henrichsen, A.; Laugesen, P.; Geiker, M.; Pedersen. J.; and Thaulow, N.: HETEK. Method for Test of the Frost Resistance of High Performance Concrete. Summary, conclusions and Recommendations (in Danish). The Danish Road Directorate, Report nr. 105, 1997.
- Laugesen, P.: The new test method for petrographic analysis? (In Danish). Presentation, Dansk Beton Forening, April 16, 1997.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Production of fluorescence impregnated plane sections. Danish test method DSF 423.39, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Production of fluorescence impregnated thin sections. Danish test method DSF 423.40, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Internal stability. Danish test method DSF 423.41 with Appendix, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Concrete composition. Danish test method DSF 423.42, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Paste homogeneity. Danish test method DSF 423.43 with Appendix, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Paste cracks and bond cracks. Danish test method DSF 423.44, 1998.
- Laugesen, P.: Testing of Concrete, Hardened Concrete, Degree of compaction. Danish test method DSF 423.45, 1998.
- Jakobsen, U., Laugesen, P. and Thaulow, N.: Determination of water to cement ratio in hardened concrete by optical fluorescence microscopy. ACI Fall Convention, Los Angeles, California 1998.
- Laugesen, P.: Concrete and its constituents. Keynote presentation, Hans S. Pietersen et al. (eds.): Proceedings from 7th Euroseminar on Microscopy of Building Materials, Delft – The Netherlands 1999.
- Laugesen, P.: Testing of un-dispersed silica fume: in condensed powder, in fresh concrete and in hardened concrete, in Hans S. Pietersen et al. (eds.): Proceedings from 7th Euroseminar on Microscopy of Building Materials, Delft – The Netherlands 1999.
- Jakobsen, U.H., Laugesen, P. and Thaulow, N. 2000: Determination of water to cement ratio in hardened concrete by optical fluorescence microscopy. In: Khan, M.S. (ed) Water-Cement Ratio and other durability parameters - Techniques for determination, ACI SP-191, pp. 27-41.
- Laugesen, P.: Four presentations: An overview of Alkali Silica Reactions. ASR – The Danish Experience. QA-QC of Aggregate Reactivity. Evaluation of test methods. Workshop on ASR, Delft 2001. Organised by RWS The Netherlands.
- Geiker, M.R. and Laugesen, P.: On the effect of laboratory conditioning and freeze/thaw exposure on moisture profiles in HPC. Cement and Concrete Research 31 (2001) 1831-1836.
- Laugesen, P. and Aarre, T.: Floor Manual - A handbook for projecting and constructing concrete floors (in Danish). DBT-NCC, 182 pages, 2001.
- Laugesen, P. and Aarre, T.: Flawless concrete floors – Planning, casting and curing concrete floors (in Danish). DBT-NCC, 46 pages, 2001.
- Laugesen, P.: Appendices A-E in the Dutch Test method for petrographic assessment of potential alkali reactivity (translated from English to Dutch): A: Fluorescent epox;, B: Vacuum impregnation of sand samples; C: Thin section production; D: Checklist and E: Photo atlas). VD-62. ReijksWaterStadt/CUR. 2002.
- Laugesen, P.: Concrete petrography in testing, construction and research. Lectures at EPFL, Lausanne, Switzerland. April 2002.
- Laugesen, P.: Preparation of impregnated polished sections and thin sections, techniques. Sixth Canmet/ACI International Conference on Durability of Concrete; Thessaloniki, 2003.
- Laugesen, P.: Objectives and benefits of conducting petrographic analysis. Sixth Canmet/ACI International Conference on Durability of Concrete; Thessaloniki, 2003.
- Bonafous, L., Strini, A., Vallee, F., Moussiopoulos, P.N., Batzis, J. McIntyre, R and Laugesen, P.: Photo-catalytic innovative covering applications for de-pollution assessment. Abstract. ECM 2004: Rilem International Symposium on Environment-Conscious Materials and Systems for Sustainable Development; Japan, 2004.
- Laugesen, P.: Do we obtain the expected porosity? Lecture at Danish Technical University Summer School on ‘Hydration and microstructure development in cement-based materials’; Lyngby Denmark – June 2003.
- Laugesen, P.: Long term microstructural changes. Lecture at DTU Summer School on ‘Hydration and microstructure development in cement-based materials’; Lyngby Denmark – June 2003.
- Laugesen, P.: Avoiding preparation defects. Workshop presentation at the 9th Euroseminar on Microscopy Applied to Building Materials, Trondheim Norway, September 2003.
- Laugesen P.: Water to cement ratio determination by fluorescence microscopy of thin sections – An online round robin test. Presentation at the 9th Euroseminar on Microscopy Applied to Building Materials, Trondheim Norway, September 2003.
- Scrivener, K.L, Crumbie, A.K. & Laugesen, P.: The interfacial transition zone (ITZ) between cement paste and aggregate in concrete: Special Issue: Cementitious materials. Interface Science, October 2004, vol. 12, no. 4, pp. 411-421(11).
- Laugesen, P.: Crack sampling, Treatment and Analysis, in O. Mejlhede et al. (Ed.) Advanced Cement-Based Materials: Research and Teaching. Proceedings of the Knud Højgaard Conference, June 2005. DTU, Report R-155.
- Laugesen, P.: Choice of concrete type and quality (in Danish). Danish Concrete Society, October 2006.
- Laugesen, P.: The importance of sample preparation for petrographic studies. Workshop at the 11th Euroseminar on Microscopy Applied to Building Materials, Porto, Portugal, June 2007.
- Laugesen, P. & Geiker M.: Effects of PP-fibres on fire-exposed concrete. Presentation at the 11th Euroseminar on Microscopy Applied to Building Materials, Porto, Portugal, June 2007.
- Laugesen, P.: Quantitative petrography and point counting. Workshop at the 13th International Conference on Alkali Aggregate Reaction in Concrete, Trondheim, Norway, June 2008.
- Laugesen, P.: Microstructure of RCC – Roller Compacted Concrete. 13th EMAMB, Dortmund 2009
- Eriksen, K., Jakobsen, U. H., Laugesen, P.: Delayed ettringite formation in concrete exposed to seawater – microstructure, cracking and expansion testing. 13th EMAMB, Dortmund 2009
- Laugesen, P.: Technical Aspects of Professional Petrography in Denmark and the World. Presentation at 11th meeting; Geological Society of London / Applied Petrography Group; September 21st 200
- Laugesen, P.: Experiences with freeze-thaw test methods: Laboratory testing versus damages in ‘real life’ concrete. Presentation at the Nordic Miniseminar: Freeze-Thaw Testing of Concrete – Input to Revision of CEN Test Methods, Vedbæk, Danmark 4-5 march 2010
- Laugesen, P.: Influence on Chloride Migration of Concrete Microstructure Defects. Presentation at the 32nd Conf. on Cement Microscopy, New Orleans, U.S.A. March 28 – April 1, 2010
- Laugesen, P.: Air Void Analysis (in Danish). Presentation at the Danish Concrete Society / ‘The concrete club’, Jutland, Denmark, May 28th
- Laugesen, P.: Inspection and Maintenance of Fresh Water Concrete Tanks (in Danish). Presentation at the Danish Water Supply Committee Meeting, December 15th
- Laugesen, P.: Air void analysis in fresh & hardened concrete. Presentation at the ICMA, International Cement Microscopy Association 33rd Annular Conference, San Francisco, April 2011.
- Laugesen, P.: Polycarboxylates – Friend or foe? Presentation at the 13th Euroseminar on Microscopy Applied to Building Materials, Ljubljana, June 2011.
- Laugesen, P.: An on-line in-situ ASR investigation of the pylons of an 80 years old concrete bridge’ Presentation at the 34th ICMA, Halle Germany, April 2012.
- Laugesen, P.: Fluorescence microscopy – A great help in concrete petrography. Presentation at the 35th ICMA, Chicago, April 2013.
- Laugesen, P.: Microstructure changes by oxidation of slag cement concrete. Workshop presentation at the 14th Euroseminar on Microscopy Applied to Building Materials (EMABM 2013), Elsinore, Denmark, June 2013
- Laugesen, P.: Application of slag cement concrete in marine environment – frost resistance (in Danish). Presentation at the Danish Concrete Society, Copenhagen, Denmark, March 2014
- Laugesen, P.: Visby 1993 re-visited: Understanding the effective W/C ratio, as influenced by aggregates and air voids. 15th Euroseminar on Microscopy Applied to Building Materials (EMABM), TU Delft, The Netherlands, June 2015.
- Laugesen, P.: 10 petrographic questions we don’t dare to ask – or maybe never thought of before… Workshop at the 15th Euroseminar on Microscopy Applied to Building Materials (EMABM), TU Delft, The Netherlands, June 2015.
- Laugesen, P.: Recycled concrete for new buildings – a demonstration project (in Danish). DAKOFA-VHGB workshop: When recycling is successful, Copenhagen, March 28th
- Laugesen, P.: Techniques in concrete microscopy with special emphasis on potential pitfalls in preparation and interpretation. Workshop at the 39th ICMA Conference, Toronto, Canada April 2017
- Laugesen, P.: 30 years of petrography in field concrete. Keynote presentation, 16th Euroseminar on Microscopy Applied to Building Materials (EMABM), EPFL, Diablerets, Switzerland May 2017.