APPLICABILITY OF CARBON FIBRES IN REFRACTORY CEMENT COMPOSITES

Authors

  • Ondřej Holčapek Czech Technical University in Prague
  • Pavel Reiterman Czech Technical University in Prague
  • Petr Konvalinka Czech Technical University in Prague

DOI:

https://doi.org/10.14311/AP.2018.58.0346

Keywords:

Aluminous cement, carbon fibres, high temperatures, fracture energy

Abstract

The main objective of this article is to present the influence of high temperatures on mechanical properties of advanced refractory cement composite reinforced with carbon fibres. The presented material is suitable for industrial applications and can withstand elevated temperatures up to 1000 °C. The action of high temperatures was investigated on two temperature levels 600 °C and 1000 °C and was compared to reference specimens dried at 105 °C. The carbon fibres with flexural strength of 4100MPa were applied in dosage 0.50 %, 0.75% and 1.00% of the total volume. The second investigated modification was mutual ratio between aluminous cement and fine ceramic powder. The influence of high temperatures was investigated by measuring the bulk density, compressive and flexural strength, dynamic modulus of elasticity and fracture energy; all measured on prismatic specimens 40 × 40 × 160 mm. The workability of fresh mixture was limited by the maximum dosage of carbon fibres in 1% of the total volume. Based on the workability and evaluation of residual mechanical properties after temperature loading, the best was found to be the combination of carbon fibres in dosage of 0.75% by volume.

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Published

2018-12-31

Issue

Vol. 58 No. 6 (2018)

Section

Articles

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How to Cite

Holčapek, O., Reiterman, P., & Konvalinka, P. (2018). APPLICABILITY OF CARBON FIBRES IN REFRACTORY CEMENT COMPOSITES. Acta Polytechnica, 58(6), 346-354. https://doi.org/10.14311/AP.2018.58.0346