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Passive Acoustic Emission for Quantitative Evaluation of Freeze Thaw and Alkali Aggregate Reaction in Concretes

by Michael A. Taylor, Univ of California, Davis, United States,



Document Type: Proceeding Paper

Part of: Nondestructive Testing of Concrete Elements and Structures

Abstract:

Several experiments are reported in which the progression of freeze thaw (FT), alkali-aggregate reaction (AAR), and internal cracking caused by mechanical loading were monitored using the passive acoustic emission technique (PAET). The results show that the method can provide several advantages over other methods, including the capacity to produce quantitative evaluation of the progression of these actions (which are frequently invisible to the naked eye).

Subject Headings: Freeze and thaw | Aggregates | Emissions | Acoustics | Cracking | Stress waves | Material tests

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