The Assessment of Cement Mortars after Thermal Degradation by Acoustic Non-destructive Methods

The Assessment of Cement Mortars after Thermal Degradation by Acoustic Non-destructive Methods

Paper in proceedings (conference paper)

Thanks, the terrorist attacks on the worldwide interest in the design of structures for fire greatly increased. One of the advantages of concrete over other building materials is its inherent fire-resistive properties. The concrete structural components still must be able to withstand dead and live loads without collapse even though the rise in temperature causes a decrease in the strength and modulus of elasticity for concrete and steel reinforcement. In addition, fully developed fires cause expansion of structural components and the resulting stresses and strains must be resisted. This paper reports the results of measurements by Impactecho method and measurement by ultrasound. Both methods are based on the acoustic properties of the material which are dependent on its condition. These acoustic methods allow identifying defects and are thus suitable for monitoring the building structure condition. The results are obtained in the laboratory during the degradation of composite materials based oncement by high-temperature.

Thanks, the terrorist attacks on the worldwide interest in the design of structures for fire greatly increased. One of the advantages of concrete over other building materials is its inherent fire-resistive properties. The concrete structural components still must be able to withstand dead and live loads without collapse even though the rise in temperature causes a decrease in the strength and modulus of elasticity for concrete and steel reinforcement. In addition, fully developed fires cause expansion of structural components and the resulting stresses and strains must be resisted. This paper reports the results of measurements by Impactecho method and measurement by ultrasound. Both methods are based on the acoustic properties of the material which are dependent on its condition. These acoustic methods allow identifying defects and are thus suitable for monitoring the building structure condition. The results are obtained in the laboratory during the degradation of composite materials based oncement by high-temperature.

Acoustic emission method; Impact-echo method; thermal degradation; mortar

Acoustic emission method; Impact-echo method; thermal degradation; mortar

TOPOLÁŘ, L.; ŠTEFKOVÁ, D.; HODULÁKOVÁ, M.

2018

25.10.2017

IOP Publishing

Bristol

3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017)

1757-8981

IOP Conference Series: Materials Science and Engineering

251

1

United Kingdom of Great Britain and Northern Ireland

1

7

7

http://iopscience.iop.org/article/10.1088/1757-899X/251/1/012094

http://hdl.handle.net/11012/137152

Topolář_2017_IOP_Conf._Ser.__Mater._Sci._Eng._251_012094