Material Behavior

Experimental investigations on the scattering in the post cracking tensile behaviour of UHPFRC

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Abstract

This contribution presents experimental research on scattering in post cracking tensile behaviour of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). The main objective of this work is to determine the main influence factors for scattering in post cracking tensile behaviour. The experimental programme includes 8 series of four-point bending tests, 48 specimens in total, varying the cross-sectional geometry, steel fibre type and fibre content. Each test series consists of 6 specimens. In order to exclude influences caused by the production and casting of UHPFRC, the specimens of each series were always cast in a continuous beam (length 4.2 m) and cut out later. To gather information on the fibre orientation and distribution, slices were cut from each specimen after its bending test. By using an opto-analytic method it was found that the detected number of fibres in the section varies widely among all specimens, while the fibre orientation is very uniform. The results of the experimental programme show decreasing scattering with increasing fibre content and cross-section area.

Keywords: self-compacting, bending test, tensile behavior, scattering, UHPFRC

How to Cite:

Hadl, P., Kim, H. & Nguyen, V., (2016) “Experimental investigations on the scattering in the post cracking tensile behaviour of UHPFRC”, International Interactive Symposium on Ultra-High Performance Concrete 1(1). doi: https://doi.org/10.21838/uhpc.2016.56