Research Articles | Challenge Journal of Concrete Research Letters

Acoustic emission signal ‘peak amplitude-distribution’ analysis related to concrete fracture under uniaxial compression

R. Vidya Sagar


DOI: https://doi.org/10.20528/cjcrl.2018.03.003
View Counter: Abstract | 957 times | ‒ Full Article | 399 times |

Full Text:

PDF

Abstract


Acoustic emissions (AE) released during the compressive fracture of cementitious materials have been subjected to analysis using ‘AE based b-value’ to study the fracture process. Identification of the ‘AE sources locations’ in three dimension is not always possible. With a minimum number of AE sensors mounted on the test specimen and by using the AE based b-value analysis, it is possible to study fracture process and the damage status in solids. The b-value of AE is calculated using the Gutenberg–Richter empirical relationship (G-R law), which is available in seismology. The details related to original G-R relation and it’s suitability for AE testing were discussed. In this article it has been tried to look into the variations of the AE based b-value in cementitious test specimens prepared with different cementitious mixture proportions. Effect of (i) coarse aggregate size in cementitious materials (ii) loading rate during compressive fracture process (iii) age of concrete on b-value variation were discussed. The trend of variation in AE based b-value during fracture process in concrete and mortar was different. It was observed that when the compression toughness of the cementitious material increases, higher b-values were observed. When the loading rate was high, quick cracking occurred and lower b-values were observed. As the coarse aggregate size in the cementitious material increases, the cumulative AE energy was higher. The reason may be due to the compression toughness of the cementitious material. The AE based b-value is useful to identify the different stages of compressive fracture process in solids.


Keywords


non-destructive testing; concrete; fracture; acoustic emission; uniaxial compression

References


Carpinteri A, Lacidogna G, Pugno N (2006). Richter’s laws at the laboratory scale interpreted by acoustic emission. Magazine of Concrete Research, 58(9), 619-625.

Colombo IS, Main IG, Forde MC (2003). Assessing damage of reinforced concrete beam using b-value analysis of Acoustic emission signals. Journal of Materials in Civil Engineering, 15(3), 280-286.

Grosse C, Ohtsu M (2008). Acoustic Emission Testing. Berlin, Springer-Verlag., Heidelberg:

Gutenberg B, Richter CF (1954). In Seismicity of the Earth and Associated Phenomena, Princeton University Press, Princeton, NJ, USA, 2nd Ed.

Holford KM (2000). Acoustic emission - Basic principles and future directions. Strain, 36(2), 51-54,

Ko W, Yu C (2009). Application of Gutenberg Richter Relation in AE Data Processing. International Journal of Applied Science and Engineering, 7(1), 69-78.

Kalyanasundaram P, Mukhopadhyay CK, SubbaRao SV (2007). Practical acoustic emission. Narosa Publishing House private limited, New Delhi.

Kurz JH, Finck F, Grosse CU, Reinhardt HW (2006) Stress drop and stress redistribution in concrete quantified over time by the b-value analysis. Structural Health Monitoring, 5, 69–81.

Landis EN, Baillon L (2002). Experiments to Relate Acoustic Emission Energy to Fracture Energy of Concrete. Engineering Mechanics, 128(6), 698-702.

Mogi K (1962) Magnitude–frequency relation for elastic shocks accompanying fracture of various materials and some related problems in earthquakes. Bulletin of Earthquake Research Institute, Tokyo University, 40, 831–853.

Mehta PK, Monteiro PJM (2006) Concrete: Microstructure, properties and materials. McGraw-Hill, Third edition.

Nair A, Cai C (2010). Acoustic emission monitoring of bridges: Review and case studies. Engineering Structures, 32(6), 1704-1714.

Neville AM (2011). Properties of Concrete. Pearson Education Limited, Edinburgh Gate Harlow Essex CM20 2JE England.

Ohtsu M (1998). Basics of acoustic emission and applications to concrete engineering, Materials Science and Research International, 4(3)131-140.

Pollock AA (1981). Acoustic emission amplitude distributions. International Advances in Nondestructive Testing, 7, 215-239.

Datt P, Kapil JC, Kumar A (2015). Acoustic emission characteristics and b-value estimate in relation to waveform analysis for damage response of snow. Cold Regions Science and Technology, 117, 170-182.

Rao MVMS, Prasanna Lakshmi KJ (2005). Analysis of b- value and improved b-value of acoustic emissions accompanying rock fracture. Current Science, 89, 1577-1582.

RILEM TC 212-ACD (2010a). Acoustic emission and related NDE techniques for crack detection and damage evaluation in concrete. Measurement method for acoustic emission signals in concrete. Materials and Structures, 43(9), 1177-1181.

RILEM TC 212-ACD (2010b). Acoustic emission and related NDE techniques for crack detection and damage evaluation in concrete. Test Method for damage qualification of reinforced concrete beams by AE. Materials and Structures, 43(9), 1183-1186.

RILEM TC 212-ACD (2010c) Acoustic emission and related NDE techniques for crack detection and damage evaluation in concrete. Test method for classification of active cracks in concrete structures by acoustic emission. Materials and Structures, 43(9), 1187–1189.

Proverbio E (2011). Evaluation of deterioration in reinforced concrete structures by AE technique. Materials and Corrosion, 62(2), 161-169.

Schumacher T, Higgins CC, Lovejoy SC (2011). Estimating operating load conditions on reinforced concrete highway bridges with b-value analysis from acoustic emission monitoring. Structural Health Monitoring, 10(1), 17-32.

Shiotani T, Yuyama S, Li Z, Ohtsu M (2001). Application of AE improved b-value to quantitative evaluation of fracture process in concrete materials. Journal of Acoustic Emission.

User’s Manual. AE win SAMOS Software (2004). Physical Acoustics Corporation, Princton Jct, NJ, USA.

Uchida, M, Okamoto T, Ohtsu M (2011). Damage of reinforced concrete qualified by AE. Challenge Journal of Concrete Research Letters, 2(3), 286-289.

vanMier JGM (1997). Fracture Process of Concrete. Assessment of material parameters for fracture models. CRC Press.

vanMier JGM (1998). Failure of concrete under uniaxial compression: An overview. Proceedings of the 3rd International conference on Fracture mechanics of concrete and concrete structures (FraMCoS-3), Gifu, Japan, AEDIFICATIO, Freiburg, Germany, 1169-1182.

Vidya Sagar R, Rao MVMS (2014). An experimental study on loading rate effect on acoustic emission based b-values related to reinforced concrete fracture. Construction and Building Materials, 70, 460-472.


Refbacks

  • There are currently no refbacks.