Damage Evaluation of Concrete Based on Acoustic Emission b-Value

Abstract:

Acoustic emission (AE) is capable of real time continuous monitoring and it's not sensitive to the geometry of components,so it's widely used in nondestructive testing of concrete. The AE b-value occupies an important position in the study of concrete damage evaluation as a parameter of AE technology. The basic theory of AE b-value and the related technical problems of AE b-value calculation was discussed. Then the research of AE b-value on concrete was reviewed. At last, the AE b-value in the damage process of cement mortar (CM) and polypropylene diber reinforced mortar (PFRM) under compression was studied and concluded that the trend of AE b-value of CM and PFRM was obviously different.The AE b-value is closely related to the formation and propagation of cracks in the damage process of concrete and it declines rapidly before final fracture occurs.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 515-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.515
• Online since: September 2013
• Authors: Zheng Zheng Xu, Yan Wang, Sheng Xing Wu, Yao Wang
• Keywords: Acoustic Emission (AE), B-Value, Concrete, Crack, Mortar

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