The Effect of Concrete Quality on the Acoustic Emission Parameters during Three-Point Bending Fracture Test

Abstract:

Acoustic emission is an experimental tool well suited for monitoring fracture processes. The paper presents experiment focused on analysing acoustic emission signals captured during three-point bending fracture test of specimens of concrete. Quantitative acoustic emission techniques were used to measure micro fracture properties. For three different concrete mixtures typical acoustic emission patterns were identified in the acoustic emission records to further describe the under-the-stress behaviour and failure development. If we have a better understanding of the relationships between micro structural events and macroscopic behaviour we can better formulate predictive models for large-scale structural performance and reliability. An understanding of microstructureperformance relationships is the key to true understanding of material behaviours. Three-point bending fracture tests were conducted on these specimens and load versus crack mouth opening displacement (Load-CMOD) diagrams were recorded during the testing.

• Periodical: Advanced Materials Research (Volume 897)
• Pages: 149-152
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.897.149
• Online since: February 2014
• Authors: Michal Matysík*, Libor Topolář, Petr Daněk, Tomáš Vymazal, Iveta Plšková
• Keywords: Acoustic Emission (AE), CMOD, Concrete, Fracture Test, Micro-Crack

References

[1] L. Topolar, L. Pazdera, V. Bilek, L. Dedeckova: Acoustic Emission Method Applied on Four Point Loading of Concrete Structures with and without Small Wires. Proceedings of the 50th Annual Conference on Experimental tress Analysis. 1. Praha, CTU Praha. 2012. pp.477-484.

[2] M. Korenska, L. Pazdera, M. Manychova: Acoustic Emission Method as a Tool of Partial Discharges Indication. International Journal of Materials and Product Technology. 2011. 42(3/4). pp.209-218. ISSN 0268-(1900).

DOI: 10.1504/ijmpt.2011.045468

[3] M. Ohtsu: Basics of Acoustic Emission and Applications to Concrete Engineering. Materials Science Research International. 1998. 4 (3). p.131 – 140. ISSN: 1341-1683.

[4] I. Plskova, Z. Chobola, M. Matysik: Assessment of ceramic tile frost resistance by means of the frequency inspection method. Ceramics-Silikáty. 2011. 55(2). pp.176-182. ISSN 0862-5468.

[5] Ch. U. Grosse, M. Ohtsu: Acoustic Emission Testing. Springer-Verlag Berlin Heidelberg. 2008. ISBN 978-3-540-69895-1.

[6] I. Kusak, M. Lunak, P. Schauer: Tracing of Concrete Hydration by Means of Impedance Spectroscopy (New Tool for Building Elements Testing). Applied Mechanics and Materials. 2013. 2013(248). pp.370-378. ISSN 1660-9336.

DOI: 10.4028/www.scientific.net/amm.248.370

[7] B. Kucharczykova, Z. Kersner, O. Pospichal, P. Misak, T. Vymazal: Influence of freeze-thaw cycles on fracture parameters values of lightweight concrete. Procedia Engineering. 2010. 2(1). pp.959-966. ISSN 1877-7058.

DOI: 10.1016/j.proeng.2010.03.104