Reykjavik, August 4-6

Nordic Rheology Conference 2004

The conference aim were as usual to cover all aspects of rheology and this year, special focus was placed on  “Suspensions, Emulsions and Fresh Concrete” manifested by a workshop on the “Rheology of fresh concrete” in connection with the conference. There was also sessions covering polymer and food rheology as well as general experimental and theoretical rheology. Topics within the themes was covered by plenary lectures by specially invited speakers. The aim was to arrive at a large gathering of people from industry and academia interested in the scientific and technological developments in rheology. 

There were four plenary lectures given by renowned scientists at the conference, opening each of the half-day scientific sessions. Each was talking about their special area of interest. The invited speakers were

• Prof. Ken Walters, University of Wales, Aberystwyth, UK

• Prof. Phil Banfill, Heriot-Watt University, Edinburgh, UK

• Prof. Peter Fischer, ETH, Zürich, Switzerland

• Dr. Jon E. Wallevik, IBRI Rheocenter, Reykjavik, Iceland

Prior to the conference, a rheology course was held at the 4^th of August. This course gave excellent access to the topical rheology subject. Invited lecturers were

• Prof. Mats Stading, SIK, The Swedish Institute for Food and Biotechnology; Theme: “Introduction to Rheology”

• Prof. Ken Walters, University of Wales, Aberystwyth, UK ; Theme: “Rheometry: Setting the Scene”

• Prof. Peter Fischer, ETH, Zürich, Switzerland; Theme: “Linear viscoelasticity”

• Prof. Karsten Qvist, The Royal Veterinary and Agricultural University , Denmark ; Theme: “Rheology of dairy based systems”

A workshop on the theme "Rheology of Fresh Concrete" was held on August 6^th.  This was in parallel to sessions E to H and included in the conference fee. This workshop were meant to be a part of an activity within proposed RILEM committee TC-REO.

Part I: Experimental error in viscometric measurements 
           Facilitator: Dr. Mette Geiker (DTU, Denmark )
Before lunch Prof. Phil Banfill (Heriot-Watt University, Edinburgh) hold an introduction about experimental error that could occur during measurement of cement paste and grout. This was followed by one-hour discussion about the theme where the participants was encouraged to give example of their experience with experimental error. After the coffee break, the same theme was apply, however with fresh concrete instead of cement paste and grout. Dr. Olafur H. Wallevik (IBRI Rheocenter, Iceland) gave the introduction.

Part II: Physical aspects of rheological behaviour of cement-based material
          Facilitator: Dr. Olafur H. Wallevik (IBRI, Rheocenter, Iceland)
After lunch, the theme was physical aspect of rheological behaviour of cement-based materials. At least the following Issues was considered:

• Thixotropy
• Thixotropic-strength
• Gel-strength
• Coagulation- and dispersion rate
• Electrostatic- and steric stabilization

Table of content for the symposium
Invited papers

• Some provocative differences between planar and axisymmetric flows in the case of SOME elastic liquids.K. Walters

• The effect of mixing on the rheology of cement-based materials containing high performance superplasticisers. P. F. G. Banfill & D. S. Swift

• Controlled structure of dispersed food systems. P. Fischer, C. Cramer & E. J. Windhab

• Thixotropic behaviour of cement pastes. J. E. Wallevik

Cement-Based Suspensions

• Centrifugal consolidation of MgO-suspensions - the influence of superplasticizers on particle packing. A. M. Kjeldsen, L. Bergström & M. Geiker

• Effect of lignosulphonate plasticiers on rheological properties of ordinary portland cement with fly ash. B. G. Petersen & N. L. Gundersen

• Simulation of the test method “L-Box” for self-compacting concrete L. N. Thrane, M. Glavind, P. Szabo, H. Stang & M. Geiker

• Three-dimensional numerical simulations of slump tests N. Roussel

• MRI measurements of steady state and transient behaviour of fresh cement pastes. S. Jarny, N. Roussel, R. Le Roy & P. Coussot

• The development of a hand-held rheology tool for characterising the rheological properties of fresh concrete. R. Cullen and R. West

Drilling Fluids and Cement Grouts

• Experimental analysis of yield stress in high solids concentration sand slurries used in temporary well abandonement operations R. Godøy, A. Svindland, A. Saasen & O. Wallevik

• On the rheological parameters governing oil well cement slurry stability R. Gandelman, C. Miranda, K. Teixeira, A.L Martins, A.L Waldmann

• Liquid displacment during oil well cementing operations E.S.S Dutra, M.F. Nacache, P.R.S. Mendes, C.R. de Miranda, A.L. Martins & G. Campos

• Oil based drilling fluids with tailor-made rheological properties: results from a multivariate analysis E. Dingsøyr, E. Pedersen & K. Taugbøl

• Rheological modelling of cementitious materials H. Hodne & A. Saasen

• Weighting material sag T. H. Omland, J. Øvsthus, K. Svanes, A. Saasen, H. J. Jacob, T Sveen, H.Hodne & P.A. Amundsen

• Geothermal well cementing: the effect of temperature and time on workability loss H.G. Svavarsson and O.H. Wallevik

Instrumentation

• Temperature control on a combined motor and transducer rheometer: a new solution B. Costello

• Determination of the linear viscoelastic properites of materials using non-viscometric geometries B. Costello

• A new integrated rheo small angle light scattering (Rheo SALS) device J. Läuger, P. Heyer & G. Pfeifer

Food rheology

• The relation between protein structure, interfacial rheology and foam formation for various milk proteins R. Ipsen & J. Otte

• Functional properties of chemically modified starches T. Ahmt, B. Wischmann, F. Madsen, O. Bandsholm & J. Thomsen

• On-Line Viscosity Measurements of Sugar Syrup at Two Concentrations using a Rotational Viscometer. S.L. Mason, H.O. Albrechtsen & A. Friis

• Rheological properties of mixtures of casein and amylopectin for food applications K. Butter, L. Lundin & L. de Jong

General and Theoretical Rheology

• Magnetorheological elastomers - possibilities and limitations. B. Stenberg, M. Lokander & T. Reitberger

• Reaction kinetics by permeable plate rheometry M. Stading & S. Edrud

• Interfacial rheology of gas/liquid and liquid/liquid interfaces P. Erni, P. Fischer & E. J. Windhab

• Compression of polymer beads: Finite element modeling of stress-strain behaviour Runi Ditlev Egholm, Peter Szabo & Søren Flygenring Christensen

• A Viscosity Function for Viscoplastic Liquids. Paulo R. Souza Mendes and Eduardo S. S. Dutra

Industrial Applications of Rheology

• Correlation between traditional methods for characterisation of sag and levelling of paints and rheological measurements K. I. Johansen

• Methods to predict processing behaviour for cross linking polyolefin compounds by extrusion and Monsanto Rheometer P. Nylander

• A novel prediction method for preparation and microstructure developing of zirconia ceramics by colloidal processing. H.Sarraf & J. Havrda

Posters

• The relation between viscoelastic properties of suspensions based on paper coating minerals and structures of the corresponding coating layers".A. Wallström and L. Järnström

• Rheological behaviour of skim milk concentrates at different pH. A. O. Karlsson, R. Ipsen, Y. Ardö & K. B. Qvist

• Rheological properties of bentonite suspensions modified with polymers A. Heinz, R. H. Stengele & M. Plötze

• Characterization of electrokinetic properties of highly concentrated ceramic suspensions by electrokinetic sonic amplitude (ESA) measurment H. Sarraf, J. Havrda & R. Herbig

• Extensional viscosity of paper coating suspensions studied by converging channel flow and filament stretching J. Jäder, G. Engström & L. Järnström

• 3-D deformation of Newtonian droplets under simple shear investigated by experiment, numerical simulation and modeling D. Megias-Alguacil, M. Dressler, P. Fischer, K. Feigl & E. J. Windhab

• Transient non-monotonic flow of surfactant solutions in strain- and stress-driven flow V. Herle, P. Fischer, & E.J. Windhab

• Modelling texture in low-fat yoghurt - relevance of shear and elongational flows T. Janhøj, M. B. Frøst, C. B. Petersen & R. Ipsen

• A method of determining processing behaviour of plastic bounded propellants and explosives C. Eldsäter, N. H. Yen, M. Wanhatalo & N. Wingborg

• Tannic acid modifies the material properties of Sorghum Kafirin film M. N. Emmambux, M. Stading & J. R.N. Taylor

• Morphology and rheological behavior of polypropylene / ATH / organoclay blends N. Ristolainen, T. Saarinen & J. Seppälä

Chairman of the conference committee were Dr. Olafur Wallevik, IBRI Rheocenter, Iceland

Other members of the conference committee were (in first-name alphabetic order):
Carina Mogren, SIK, Göteborg, Sweden
Dóra K. Björnsdóttir, Icelandic Building Research Institute
Edda Lilja Sveinsdóttir, IBRI Rheocenter, Iceland
Dr. Halldor G. Svavarsson, IBRI Rheocenter, Iceland
Helge Hodne, Stavanger University College, Stavanger, Norway (Treasurer of NRS)
Dr. Jon E. Wallevik, IBRI Rheocenter, Iceland
Prof. Mats Stading, SIK, Göteborg, Sweden
Dr. Niall W. G. Young, Danisco, Denmark (Secretary of NRS)
Dr. Peter Szabo, Department of Chemical Engineering, Technical University of Denmark (President of NRS)
Dr. Sarah Mason, Department of Chemical Engineering, Technical University of Denmark (NRS Editor)
Sigrún Pétursdóttir Eyfeld, Icelandic Building Research Institute (IBRI)