The Resistance Tests of Glass-Cement Plates in High Temperatures

Abstract:

The glass-cement plates have made great progress today. They extend the possibilities of technical requirements in solutions of complex structures. The higher aesthetic requirements are available with the plates and in another point of view they contribute significantly to economic aspect in construction. The article describes the tests of high temperatures resistances of glass-cement plates. The first part is focused on determining the values of tensile strength in bending for samples subjected to annealing at temperatures 200, 300, 400 and 500 ° C in endurance at the highest temperature level for 24 hours. The results will be compared with values obtained for the reference samples. The bending strength was performed according to the norm ČSN EN 1170-4 Precast concrete products - Test method for glass-fibre reinforced cement - Part 4: Measuring bending strength, "Simplified bending test" method. The mean strength in bending of reference samples was equal to 11.3 MPa. The strength is decreasing with temperature of firing and dependence is very closed to linear relationship with slope approx. 1.87 MPa per 100 °C. Furthermore, the thermal dilatometric analysis was performed on the plates in the temperatures till 540 °C in the second part.

• Periodical: Key Engineering Materials (Volume 586)
• Pages: 182-185
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.586.182
• Online since: September 2013
• Authors: Michaela Kostelecká, Miroslav Vokáč, Daniel Dobiáš
• Keywords: Bending Strength, Glass-Cement Plates, GT-DTA Analysis, Temperature Resistance, Thermal Expansion Analysis

References

[1] EN 1170 – 4 Precast concrete products - Test method for glass-fibre reinforced cement - Part 4: Measuring bending strength, Simplified bending test, method.

DOI: 10.3403/01299040u

[2] EN 1015-11 Methods of test for mortar for masonry - Part 11: Determination of flexural and compressive strength of hardened mortar.

DOI: 10.3403/01905442

[3] M. Vokáč, A. Kloužková, V. Hanykýř, P. Bouška, Dilatometric Analysis of Ceramic Roof Tiles for Determining Irreversible Moisture Expansion, Ceramics-Silikáty 53 (4) (2009) 231-314.

[4] U. Schneider, U. Diederichs, Physical properties of concrete from 20 ºC up to melting, Betonwerk + Fertigteil-Technik (3) (1981) 141-149.