Development of high performance hybrid fibre concrete

Title: Development of high performance hybrid fibre concrete
Author(s): I. Markovic, J. C. Walraven, J. G. M. van Mier
Paper category : conference
Book title: International Workshop High Performance Fiber Reinforced Cement Composites
Editor(s): A. E. Naaman and H. W. Reinhardt
Print-ISBN: 2-912143-38-1
e-ISBN: 2912143799
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 277 - 300
Total Pages: 24
Nb references: 17
Language: English

Abstract: Development of new types of concrete with improved performance will be a very important issue for the whole building industry in the near future. This development is based on the optimisation of the concrete mix design, with an emphasis not only to the workability and mechanical properties but also to the durability and the reliability of the concrete structures in general. Appearance of the new types of concrete requires a revision and improvement of existing structural systems and actual building technologies. The economical aspect are of importance as well. In the first part of this paper, a selection of the performed research on high and ultra-high performance fibre reinforced concrete, is given. The idea was to observe the directions and progress in the material development, and also to present a synthesis of the available knowledge. In the second part of the paper, the workability and the mechanical properties of the several types of newly developed, self-compacting hybrid fibre concrete, are presented. This concrete type contains basically short straight and long hooked ends steel fibres. The w/c-ratio of the concrete mixtures was 0.2, and the applied fibre content ranged between 0 and 4%. Workability studies showed that the self-compacting mixtures could be produced even with higher fibre contents. Next, three-point bending tests using notched beams were performed. The obtained results confirm, that the flexural strength and the ductility of hybrid fibre concretes with low or moderate fibre contents, is tremendously improved in comparison with plain concrete. A relatively low cost/benefit-ratio, very good workability and excellent mechanical properties, form a basis for the future practical applications of hybrid fibre concrete.

Online publication: 2003-04-28
Publication type : full_text
Public price (Euros): 0.00