2022
DOI: 10.3390/ma15155389
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The Correlation between Shrinkage and Acoustic Emission Signals in Early Age Concrete

Abstract: This study analysed the processes of damage formation and development in early age unloaded concrete using the acoustic emission method (IADP). These are of great importance in the context of the durability and reliability of a structure, as they contribute to reducing its failure-free operation time. Concrete made with basalt aggregate and Portland or metallurgical cement cured under different conditions after demoulding was the test material. The obtained damage values were compared with the measured concret… Show more

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Cited by 5 publications
(6 citation statements)
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“…The size of a pulse is the number of beams failed in the trail of breaking events, the pulse duration T follows as the difference between the time of the last and first beam breaking , while the waiting time between consecutive pulses is the duration of the silent period between them. These pulses of the global cracking activity are analogous to the acoustic outbreaks of real experiments on restrained shrinking so that the statistics of pulse quantities can be compared to the corresponding results of AE measurements 19 , 20 , 22 , 23 . The probability distribution of pulse sizes is presented in Fig.…”
Section: Resultsmentioning
confidence: 99%
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“…The size of a pulse is the number of beams failed in the trail of breaking events, the pulse duration T follows as the difference between the time of the last and first beam breaking , while the waiting time between consecutive pulses is the duration of the silent period between them. These pulses of the global cracking activity are analogous to the acoustic outbreaks of real experiments on restrained shrinking so that the statistics of pulse quantities can be compared to the corresponding results of AE measurements 19 , 20 , 22 , 23 . The probability distribution of pulse sizes is presented in Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The number of systematic acoustic emission studies on shrinking induced cracking is rather limited in the literature. AE measurements on shrinking concrete revealed non-universal power law exponents increasing as the sample dries 19 , 20 . Our calculations suggest that the decreasing shrinking rate during solidification decreases the nucleation rate of local cracking events, which reduces their temporal overlap, and hence, increases the exponents towards their counterparts of local avalanches.…”
Section: Discussionmentioning
confidence: 98%
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“…Examples of the application of this method are given, for example, in [ 50 , 51 ], where it was used to identify destructive processes in the diagnosis of reinforced concrete objects. In [ 52 , 53 , 54 ], it was used to identify active destructive processes in unloaded concrete or in [ 55 ] for monitoring the course of the alkali-silica reaction. The difficulty of this method involves not only the need to develop a signal base of model destructive processes before testing but also to determine the velocity of the longitudinal wave, which is necessary to locate these processes.…”
Section: Methodsmentioning
confidence: 99%