Influence of Ceramic Fibers on Mechanical Characteristics of Refractory Composites

Abstract:

New and unexpected way of using cement composite in industrial sectors represents a current challenge for many research teams all over the world. Following contribution deals with the study of fiber-cement composite ́s mechanical properties after exposure to high temperature. This composite could be used for industry applications or for fire-resistance cladding production. Tensile strength in bending, compressive strength, bulk density and dynamic modulus of elasticity were examined on samples 40 x 40 x 160 mm. All parameters were measured before and after exposure to high temperature in electric furnace. One group contained three specimens was reference, without temperature load, the second group was exposure to 600 °C and the last one to 1000 °C. High aluminous cement Secar®71 works as refractory binder and nature crushed basalt aggregates two fractions works as filler. The composite ́s matrix was supplemented by various amounts of ceramic fibers. Especially the influence of amount of fibers on final properties was the main goal of this research. Measured mechanical parameters provide deep knowledge of their behavior after temperature on 1000 °C level. The compressive strength and tensile strength in bending achieved values 1.5 MPa. Behavior of the composite during and after temperature load was without any negative phenomena such as explosive spalling, cracks in aggregates or cement paste and macro disintegration of the composite ́s structure.

• Periodical: Advanced Materials Research (Volume 1054)
• Pages: 22-26
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1054.22
• Online since: October 2014
• Authors: Ondřej Holčapek*, Pavel Reiterman, Petr Konvalinka
• Keywords: Aluminous Cement, Ceramic Fibers, Compressive Strength, Crushed Basalt Aggregates, Dynamic Modulus of Elasticity, High Temperature Influence, Tensile Strength in Bending

References

[1] Máca, P., Sovják, R., Konvalinka, P., Mix design of UHPFRC and its response to projectile impact, International Journal of Impact Engineering, 2014, pp.158-163.

DOI: 10.1016/j.ijimpeng.2013.08.003

[2] Vogel, F., Sovják, R., Jogl, M., 2013, Experimental tests of UHPC in triaxial compression, Applied Mechanics and Materials, Vol. 486, pp.78-83, ISBN 978-3-03785-977-3.

DOI: 10.4028/www.scientific.net/amm.486.78

[3] Koňáková, D., Vejmelková, E., Špedlová, V., Polozhiy, K., Černý, R., 2014, Cement Composites for High Temperature Applications, Mechanical, Advanced Materials Research, Vol. 982, pp.154-158.

DOI: 10.4028/www.scientific.net/amr.982.154

[4] Holčapek, O., Reiterman, P., Konvalinka, P., 2014, High Temperature Composite of Aluminous Cement with Addition of Metakaolin and Ground Bricks Dust, Applied Mechanics and Materials, Vol. 486, pp.406-411.

DOI: 10.4028/www.scientific.net/amm.486.406

[5] Reiterman, P., Holčapek, O., Vogel, F., Jogl, M., Koťátková, J., 2014, Fracture and Mechanical Properties of Fire Resistant Fibre Composites Containing Fine Ground Ceramic Powder, Advanced Materials Research, Vol. 897, pp.192-195.

DOI: 10.4028/www.scientific.net/amr.897.192

[6] Holčapek, O., Reiterman, P., Vogel, F., Vejmelková, E., Konvalinka, P., Mechanical Properties of Aluminous Paste at High Temperature, Research and Applications in Structure Engineering, Mechanics and Computation 2013, Cape Town, ISBN 978-1-138-00061-2, (2013).

[7] Kynčlová, M., Hájek, P., Fiala, C., Utilization of High Performance Composites in Material Effective Building Structures 2010, Proceeding CESB 2010 Prague – Central Europe towards Sustainable Building From Theory to Practice, ISBN 978-802473624-2, pp.1-4.

[8] S. Haoyang, J. Xu, Dynamic Compressive Behavior of Ceramic Fiber Reinforced Concrete Under Impact Load, Construction and Building Materials Volume 45, (2013), pp.475-488.

DOI: 10.1016/j.conbuildmat.2013.04.008

[9] J. S. Szábo, J. Karger-Kocsis, O. Gryshchuk and T. Czigány, Effect of Fiber Surface Treatment on the Mechanical Response of Ceramic Fiber Material-Reinforced Interpenetrationg Vinyslester/Epoxy Resin, Composites Science and Technology, (2004).

DOI: 10.1016/j.compscitech.2004.01.006

[10] CSN EN 12504-4: Testing concrete – Part 4: Determination of ultrasonic pulse velocity (2005).