NON-DESTRUCTIVE TESTING AND X-RAY DIFFRACTION ANALYSIS OF HIGH-TEMPERATURE DEGRADED CONCRETE

Authors

  • Richard Dvořák Brno University of Technology, Faculty of Civil Engineering, Institute of Physics, Brno, Veveří 331/95, Czech Republic
  • Zdeněk Chobola Brno University of Technology, Faculty of Civil Engineering, Institute of Physics, Brno, Veveří 331/95, Czech Republic

DOI:

https://doi.org/10.14311/CEJ.2018.03.0022

Keywords:

KEYWORDS Impact-Echo method, Concrete, Coarse aggregate, High-temperature degradation, Non-destructive testing, X-ray diffraction analysis

Abstract

In the field of civil engineering a diagnostics acoustic non-destructive testing is widely used and in the past years it was used even in testing of high-temperature degraded concrete structures. These methods can provide specific information about the physical-mechanical state of material; however physical-chemical changes in microstructure are measurable to a limited extent. This article is focused on non-destructive and destructive testing of high-temperature degraded concrete test beams of dimensions 0.1 × 0.1 × 0.4 m fired at 200 − 1200 °C. The Impact-Echo method and ultrasonic velocity pulse method measurements are compared with destructive test results. Testing of measured changes in the p-m properties of reference and fired samples is then supplemented by X-ray diffraction analysis, in order to document mineralogical physical-chemical changes of tested material.

Downloads

Download data is not yet available.

References

PROCHÁZKA, Jaroslav, Radek ŠTEFAN a Jitka VAŠKOVÁ. Navrhování betonových a zděných konstrukcí na účinky požáru. Vyd. 1. V Praze: České vysoké učení technické, 2010.

CHOBOLA, Zdenek, Kristyna SRAMKOVA a Danieala STEFKOVA. The Use Acoustic Methods for Non-destructive Testing of High-temperature-degraded Cement- based Composite. In: Mechanics and Control Engineering: Applied Mechanics and Materials. 2014. Switzerland: Trans Tech Publications, b.r., s. 1395-1399

OZAWA, M., S. UCHIDA, T. KAMADA a H. MORIMOTO. Study of mechanisms of explosive spalling in high-strength concrete at high temperatures using acoustic emission. Construction and Building Materials. 2012, 37, 621-628.

MALHOTRA, V. a Nicholas CARINO. Handbook on nondestructive testing of concrete. 2nd ed. Boca Raton, Fla.: CRC Press, 2004. ISBN 08-031-2099-0.

BRACEWELL, R. The Fourier Transform & Its Applications. 3. USA: McGraw-Hill Science/Engineering/Math, 1999.

ČSN 73 1371. Non-destructive testing of concrete – Method of ultrasonic pulse testing of concrete. Prague: Czech normalization institue, 1983.

VENKATARAMAN, Ganesan, Debendranath SAHOO a Venkataraman BALAKRISHNAN. Beyond the Crystalline State an Emerging Perspective. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989.

ZHANG, Q. a G. YE. Dehydration kinetics of Portland cement paste at high temperature. Journal of Thermal Analysis and Calorimetry. The Netherlands, 2012, , 6. DOI: 10.1007/s10973-012-2303-9.

GERNAY, T. a J.M. FRANSSEN. A Comparison Between Explicit and Implicit Modelling of Transient Creep Strain in Concrete Uniaxial Constitutive Relationships. Fire and Materials 2011. London: Interscience Communications Ltd, 2011, 31, 405-416.

HAGER, I. Post-fire assessment of mechanical properties of concrete with the use of the impact-echo method. Construction and Building Materials. 2015, 2015, 9.

GRAVES, H. L. A Review of the Effects of Elevated Temperature on Concrete Materials and Structures. Volume 1: Plant Operations, Maintenance and Life Cycle; Component Reliability and Materials Issues; Codes, Standards, Licensing and Regulatory Issues; Fuel Cycle and High Level Waste Management. ASME, 2006, , 615-624.

ROUXHET, P.G., J.L. GILLARD a J.J. FRIPIAT. Thermal decomposition of amosite, crocidolite and biotite. Mineralogical magazine. Belgium: Laboratoire de Physico-Chimie Minérale, 1972, 38, 583-592.

BODNÁROVÁ, L., J. ZACH, J. HROUDOVÁ a J. VÁLEK. Methods for Determination of the Quality of Concretes with Respect to their High Temperature Behaviour. Procedia Engineering. 2013, 65, 260-265.

Downloads

Published

2018-10-31

Issue

Section

Articles

How to Cite

NON-DESTRUCTIVE TESTING AND X-RAY DIFFRACTION ANALYSIS OF HIGH-TEMPERATURE DEGRADED CONCRETE. (2018). Stavební Obzor - Civil Engineering Journal, 27(3). https://doi.org/10.14311/CEJ.2018.03.0022