Rheology of cement based
Uitgave van Forum, verschijnt wekelijks (niet in juli), XXX 2004, afgiftekantoor Antwerpen X, P409562
such as cement paste, mortar and concrete
VU: Hans Romaen, Technologisch Instituut vzw, Desguinlei 214, 2018 Antwerpen 1
October 7 and 8, 2004
BBRI, Limelette, Belgium
Section on Civil Engineering
Rheology of cement based particle suspensions
such as cement paste, mortar and concrete
In the world of construction and concrete, self-compacting concrete (SCC) is beyond any doubt the
most important innovation. The highly flowable concrete can be placed by its own weight without
the need for extra consolidation. The SCC offers quite some opportunities for structures with very
dense reinforcement or complex formwork because the homogeneity of the concrete can be
guaranteed, independently from the casting process. Important extra advantages are the reduced
manual labour, the shorter delivery times and the high surface quality.
Some of the most critical problems, like segregation, formwork pressure, etc. are influenced and can
be controlled directly by the rheology of the fresh SCC. As it is important to control the behavior of
the fresh SCC, we invited prof. dr. ir. Wallevik to give an introduction course on concrete rheology
and workability. The course will be given at the research centre of the BBRI.
ir. Niki Cauberg, BBRI ir. Etienne Hemerijckx
ir. Jan Desmyter, BBRI Chairman of the section
Scientific Coordinators Civil Engineering
Rheology is by definition the science of flow and deformation of matter. So to describe the
workability of fresh concrete one should use rheological approach. But to be able to use the science
of rheology one has to be able to evaluate the rheological properties of the material. This has been
a big problem in the science of concrete technology.
Since Powers and Wiler introduced their plastometer in 1941, several attempts have been made to
take a more basic approach to the testing of fresh concrete properties. Most of these attempts,
however, have only resulted in various types of prototype equipment. Consequently, the most
common way of testing fresh concrete properties is still based on various types of empirical test
methods, such as the slump method introduced by Abrams in 1918.
It was a great step forward, therefore, when Tattersall introduced his two-point test apparatus for
measuring concrete workability in 1973.
Since then, the concrete technology has gradually introduced the use of rheological approach.
The course is designed for those in industry, university or research institution, who work with
problems related to fresh concrete properties and/or others cement based particle suspensions such as
cement paste, grout, repair materials, mortar, for instance self levelling flooring grout.
The purpose of this course is to give a broad introduction of the basics in rheology of coarse
particle suspensions with a main focus on fresh concrete and practical application of it. Also, to
give an introduction to coagulation rate process to explain the mechanism which controls the
Dr. Olafur H. Wallevik has worked with the rheology of concrete and other cement based
particle suspensions since he finished his master thesis on that theme at the Norwegian
Institute of Technology in 1983. In the year 1987 he made the first version of the BML
Viscometer which now is purchased throughout the world. He received his doctor degree in
rheology from the same university in 1990.
His special fields are Rheology of Fresh Concrete, High Performance Concrete, High Strength
Concrete, Self-Compacting Concrete and Microstructures.
He is the head of the concrete division at The Icelandic Building Research Institute (IBRI,
http://www.rabygg.is, also member of the ENBRI) and the manager of the ConTec Ltd., one of
the leading firms in producing viscometers for coarse particle suspensions. Among others, he is
the former vice president of the Nordic Rheology Society and former chairman of the scientific
commission in the Nordic Concrete Federation.
The course will be divided into three parts: The main emphasis will be given to
basic rheology, concrete rheology and rheology of concrete and mortars. Some
coagulation/workability loss mechanism. practical examples will be given to
Following are some keywords for the basic illuminate the theory. Some keywords are:
• Effect of water
• Basic terms • Effect of cement
• Models • Effect of admixtures
• Bingham model • Effect of pozzolans
• Volume concentration of particles • Effect of grinding aid
• Thixotropy • Effect of aggregates
• Viscosimetry • Special concrete (HPC, HSC, SCC ..)
• Equilibrium stress • Practical application
• General equation
• Workability loss Development of SCC is an ideal
Time schedule: Thursday 7 and Friday 8 October 2004
Time Thursday Friday
9:15-10:00 Intro* Advanced theory
10:15-11:00 Introduction workability loss
11:15-12:00 Basic models HPC, HSC, SCC
12:00-13:15 Lunch Lunch
13:15-14:00 Basics (concrete) The new generation SP
14:15-15:00 Cement, pozzolanes,... Practical application
15:15-16:00 SP, Air,... Examples
16:15-17:00 Practical application Conclusion*
Note: The schedule is subject to changes
* Intro and conclusion by guest speakers of two Belgian Universities:
Prof. dr. ir. Geert De Schutter (Labo Magnel voor Betononderzoek, Universiteit Gent)
Prof. dr. ir. Lucie Vandewalle (Dept. Burgerlijke Bouwkunde, K.U. Leuven)
All lectures are held in English.
October 7 and 8, 2004
Belgian Building Research Institute (BBRI)
Avenue P. Holoffe 21
B- 1342 Limelette
Tel. : 02 655 77 11
Route : http://www.wtcb.be/homepage/index.cfm?cat=contact
Preferably before September 28, 2004 by returning the
enclosed registration form to Technologisch Instituut vzw.
❏ € 575
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Desguinlei 214 Excl. 21 % VAT.
2018 Antwerpen 1
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