Analysis of Damage of Reinforced Mortar by Non-Destructive Methods

Hossam A. Elaqra, Maher Sharia, Rachid El Guerjouma

Abstract


The aim of this study is the improvement of the potential of coupling between non-destructive methods on damage characterization of mortar (acoustic emission and ultrasound).

The mortar is a very heterogynous material, in which damage can be estimated by the method of the ultrasounds. It is also fragile, which allows to have intense signals by the technique of acoustic emission.

The results obtained on this paper concern the reinforced mortar by steel fibres, show that damage can be describe in three stages of damage. Stage 1, where there is no acoustic activities, stage 2, correspond the increase of the attenuation according to the increase of the value of the applied strength. This value depends very strongly on the applied strength, then the strength is strong, the attenuation is important. The value of the attenuation in the case without load is very different from that observed just before the failure in third stage.


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References


Goszczyńska, B. Analysis of the process of crack initiation and evolution in concrete with acoustic emission testing. Archives of Civil and Mechanical Engineering, 14(1), (2014) 134-143.

Hu, J. L., and Feipeng, X. Evaluation of concrete fracture procedure based on acoustic emission parameters. Construction and Building Materials, Vol. 47, (2013) 1249-1256.

Elfergani, H. A., Pullin, R., and Holford, K. M. Damage assessment of corrosion in prestressed concrete by acoustic emission. Construction and Building Materials, Vol. 40, (2013) 925-933.

Qingli, D., Kenny, N., Jun, Z., et al. Damage investigation of single-edge notched beam tests with normal strength concrete and ultra-high performance concrete specimens using acoustic emission techniques. Construction and Building Materials, Vol. 31, (2012) 231-242.

Tetsuya, S., Hidehiko, O., Ryuichi, T., et al. Use of acoustic emission and X-ray computed tomography for damage evaluation of freeze-thawed concrete. Construction and Building Materials, 24(12), (2010) 2347-2352.

Shah, A. A., and Ribakov, Y. Effectiveness of nonlinear ultrasonic and acoustic emission evaluation of concrete with distributed damages. Materials & Design, 31(8), (2010) 3777-3784.

Elaqra, H. Study of damage and reinforcement of composite on cimentitous materials, PhD thesis, INSA de Lyon, France (2004)


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