specializes in concrete technology, in particular in rheology of cement
based materials such as cement paste, mortar and concrete.
Our goal is to be leading in concrete technology. We sell vicometers
and bring our knowledge to others in the form of lecturing and consulting.
Our target group, both for our instruments but also for our service in
consulting and lecturing are those in industry, university or research
institution who work with problems related to fresh concrete properties
and/or others cement based particle suspension such as cement paste, grout,
repair materials, mortar, for instance self leveling flooring grout
ConTec produces and sells coaxial cylinder viscometers in variable sizes or
capacity testing on material sample from 300 ml to 25 liters. The
viscometers are fully automated and computerized viscometers for fresh
concrete, mortar and paste. The first viscometer BML-viscometer was
developed at the Norwegian Institute of Technology by Dr. Olafur Wallevik
et. al. as a part of an extensive research program on fresh concrete
properties during years 1982-1991. Under the supervision of Dr.Wallevik there have been developed more types of viscometers. The
viscometers have been sold to several countries around the world.
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. 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) and the manager of ConTec Ltd. Dr. Wallevik has many
senior positions, including being vice president of the Nordic Rheology
Society and the chairman of the scientific commission in the Nordic Concrete
Our seminar, Dr. Wallevik Rheology course:
Rheology of Coarse Suspensions, such as Cement Paste,
Mortar and Concrete”, have been hold in over 8 different countries.
The course is designed for those in industry, university, or research
instutution, who work with problems related to fresh concrete properties
and/or other cement based particle suspensions such as cement paste, grout,
repair materiald, mortar, for instance self leveling flooring grout.
The purpose of the course is to give a broad introduction to the basics in
rheology of coarse particle suspensions with a main focus on fresh concrete
and practial applicatin of it. Also, to give an introduction to
coagulation rate process to explain the mechanism which controls the
Last courses: A special course was hold by CBI Sweden:
Rheology of Self-Compacting Concrete.
In last months courses have been hold in : USA, China and Germany.
In additional to the viscometers and the courses we have been bringing our
knowledge in to several companies in Europe and USA in the form of
104 Reykjavik -
Iceland - Tel: +354 896 9675 -