Publication detail

Performance of hybrid steel and aramid fibre reinforcement in ultra-high performance concrete

BOCIAN, L. ŠOUKAL, F. NOVOTNÝ, R. KOPLÍK, J. PALOVČÍK, J. TANDLICH, D.

Original Title

Type

lecture

Language

Czech

Original Abstract

The UHPC offers unprecedented mechanical properties, such as high compressive strength. Its properties can also be modified by the incorporation of steel fibres to obtain high flexural strength and ductile behaviour. One of the new approaches to further improving the properties of UHPC is the combination of steel and polymer fibres for their potential synergistic effect. In this study, we explore the possibility of combining steel and short-cut aramid fibres for possible improvement of mechanical properties. First, the slump flow of each mix was determined. Second, the flexural and compressive strength were measured after 7 d, 14 d, 28 d and 56 d. Finally, the fracture surfaces of these composites were studied by means of scanning electron microscopy. It was found that the addition of short-cut aramid fibres decreases slump flow significantly and that the short-cut aramid fibres tend to agglomerate in the matrix. Mechanical properties were not significantly influenced by the addition of short cut aramid fibres. However, there are some preliminary results that indicate that the overall performance of aramid fibres in UHPC could be significantly improved by their surface modification.

Authors

BOCIAN, L.; ŠOUKAL, F.; NOVOTNÝ, R.; KOPLÍK, J.; PALOVČÍK, J.; TANDLICH, D.

Released

28. 8. 2023

BibTex

@misc{BUT184504,
  author="Luboš {Bocian} and František {Šoukal} and Radoslav {Novotný} and Jan {Koplík} and Jakub {Palovčík} and Dávid {Tandlich}",
  title="Performance of hybrid steel and aramid fibre reinforcement in ultra-high performance concrete",
  year="2023",
  note="lecture"
}