CONCRETE

[:ru]Поникиевский Т.[:en]Ponikiewski, T.[:] [:ru]канд. техн. наук, доцент, Силезский технический университет, Кафедра строительных процессов и материалов, г. Гливице, Польша[:en]Assistant Professor, Dr. PhD, Civ., Eng., Department of Building Materials and Processes, Silesian University of Technology, Gliwice, Poland[:]

Alitinform №1 (38) 2015 г. 52-65 p.

Abstract

This paper presents methods of identifying the deployment of steel fibers in concrete. The paper presents an analysis of cross-sections of beams made of Steel Fiber Reinforced High Performance Self-Compacting Concrete (SFRHPSCC). The analysis was performed by two methods, using our own computer program (destructive method), and computed tomography (non-destructive method). In the research there were used steel fibres KE 20/1.7 and SW 35/1.0. The studies showed the characteristic dispersion of steel fibres in the moulded concrete elements, and the usefulness of the methods for diagnostic research. Thanks to these, some essential features of the scattering of fibres in a matrix of concrete were confirmed. These proposed research methods enable one to determine partially (destructive method) or fully (non-destructive method) the distribution of steel fibres in the tested concrete. There were no formation of fibre clusters in the test content of the steel fibers in concrete and there was no “wall effect”, following the formation of the model elements. The tests confirmed the correct formation of concrete, maintaining the uniformity of steel fibre distribution.

Key words:

steel fibre; high-performance self-compacting concrete; fibre orientation; rheology; workability; Bingham model; X-ray Computed Tomograph