Source: CBMA

Date: September 22, 2014

On the afternoon of September 19, Prof. Olafur H. Wallevik, professor of Innovation Center Iceland and visiting professor of CBMA visited CBMA, and delivered a wonderful report titled “Rheology of fresh concrete—A key of making HPC”.

The report mainly gave an introduction from three aspects. First, basic theory of concrete rheology. Prof. Wallevik introduced the basic theory of concrete rheology with the Bingham model, and analyzed in detail the relationship between work performance and rheological properties of fresh concrete. Second, influence of different raw materials on the rheological properties of fresh concrete. He introduced the influence of concrete raw materials on the rheological properties, including cement content, water content, aggregate content and shape and admixture content, as well as expounded on the basic theory and latest research progress on the effect of mineral admixtures such as slag and coal ash on the work performance and rheological properties of fresh concrete. Third, formulation of low-carbon and high-performance concrete based on concrete rheology. Prof. Wallevik presented the design method of concrete based on rheology, and when the high-performance concrete formulated with it is higher than 40MPa in terms of strength, the amount of cementitious materials is less than 250kg/m³.

As the head of Basic Research at Innovation Center Iceland, professor of Reykjavik University and adjunct professor of University of Sherbrooke, Prof. Olafur H. Wallevik was honored as visiting professor of CBMA, members of International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), ACI, International Federation for Structural Concrete (FIB), and British Society of Rheology (BSR) in February 2014. He has conducted deep research on fresh concrete’s rheological properties, high-performance concrete, high-strength concrete, self-compacting concrete and its microstructure. He teaches more than 40 lessons related to rheology or self-compacting concrete in 16 countries, and has got awards in Iceland, Canada, NATO Concrete Federation and other countries or organizations. In 2013，he received the Knight Cross of the Falcon Order awarded by Iceland’s President.