One of the reasons for the insufficient durability of structures is the poor homogeneity of the concrete which is mainly caused by an inadequate compaction. A solution to this problem is the use of self-compacting concrete. Due to its special rheological properties (flowability and high viscosity) no external compaction energy has to be used. The application of self-compacting concrete makes new demands on the user that will be examined within the project.
One goal of the project is to develop an adaptable mix design that makes is possible to produce self-compacting concrete using a wide variety of different components (aggregate, cement, filler). Furthermore, this mix should enable the realization of specific concrete properties.
Another goal is improved durability of self-compacting concrete by the addition of polymer fibre shortcut and practical contribution to the development of building material.
A. Leemann, Hoffmann C., Olbrecht Hp (2001). Self-compacting concrete. tec 21, 107. Born, 40/2001, 05.10.2001, page 7 - 12th
Hoffmann C., Leemann, A. (2003): Homogeneity of Structures Made with Selfcompacting Concrete and Conventional Concrete. 3rd International RILEM Symposium on Self-Compacting Concrete, Proceedings PRO 033, RILEM Publications SARL, ISBN: 2-912143-42-X, Reykjavik, Iceland, Edited by O. Wallevik and I. Nilsson. 17 - 20.08.2003, p. 619-627.
Leemann, A., C. Hoffmann (2003): Pressure of Self-Compacting Concrete on the Formwork. 3rd Interna tional-RILEM Symposium on Self-Compacting Concrete, Proceedings PRO 033, RILEM Publications SARL, ISBN: 2-912143-42-X, Reykjavik, Iceland, Edited by O. Wallevik and I. Nilsson. 17 - 20.08.2003, p.288-295.
Leemann, A., C. Hoffmann (2003): formwork pressure of self-compacting concrete, BFT Concrete Plant and Precast Technology, 11/2003, Page 48 - 55th
A. Leemann, Hoffmann C. (2003): Formworkpress: measurement results of the Swiss Federal Laboratories for Materials Science, the Swiss construction industry, No. 46, page 23.
In the proposed project, the influence of the various components of the self - compacting concrete are examined. From the test results, the relationship between the hardened concrete values are evaluated and compared. Especially are considered relevant data to the durability properties such as porosity, permeability and shrinkage. The findings from the laboratory tests shall be implemented into manufacture of self-compacting concrete.