Acoustic Emission Characterization of Fresh Cement-Based Materials

Aggelis, Dimitrios G.; Große, Christian U.; Shiotani, Tomoki

doi:10.1007/978-3-030-39738-8_1

Cited by 7 publications

(6 citation statements)

References 35 publications

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“…The transient pressure changes are transformed by the piezoelectric elements into electric waveforms. Preamplifiers are used to amplify the signal before storing it on the acquisition board where the waveform parameters are analyzed [7]. To ensure the coupling efficiency of the sensor to the material, the Pencil Lead Break (PLB) test is performed.…”

Section: Methodsmentioning

confidence: 99%

“…Non-destructive techniques, such as AE and Ultrasonic Pulse Velocity (UPV) have gained a lot of attention recently for the characterization of fresh cementitious materials [5,6]. Acoustic emission is a passive, highsensitivity monitoring technique that records elastic waves propagating through the medium and has been proven adequate to monitor the different processes taking place in concrete at an early stage [7,8]. AE is useful when it comes to collecting real-time data from the interior of the material and providing information just a few minutes after casting the material.…”

Section: Introductionmentioning

confidence: 99%

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The sensitivity of Acoustic Emission (AE) for monitoring the effect of SAPs in fresh concrete

et al. 2023

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Fresh concrete is characterized by numerous processes taking place simultaneously such as settlement, hydration, early-age cracking and shrinkage. Those processes have a strong impact on the strength and durability, hence monitoring the material at an early stage is essential to ensure the required performance. Acoustic Emission (AE) is a non-destructive, highly sensitive technique that records elastic waves propagating through the medium and has proven to be adequate to monitor the complex processes taking place at an early age. In this study, the method of AE is applied on fresh concrete cubes with or without the addition of SuperAbsorbent Polymers (SAPs). SAPs are particles that have been recently used for internal curing or self-healing of cementitious materials. The water-releasing action of SAPs is accompanied by high AE activity. The purpose of this study is to investigate the possibility to control the internal curing of concrete based on real-time AE data, as well as to make projections towards the final mechanical properties while still at a young age, in order to ensure the desired concrete performance.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The sensitivity of Acoustic Emission (AE) for monitoring the effect of SAPs in fresh concrete

et al. 2023

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“…Therefore, the reception of high energy AE bursts during this stage indicates the starting of the detrimental action of cracking and allows external curing treatment to mitigate it [7]. A recent review on this topic is composed by Aggelis et al [29].…”

Section: Acoustic Emission In Fresh Concretementioning

confidence: 99%

The Contribution of Elastic Wave NDT to the Characterization of Modern Cementitious Media

Lefever

Snoeck

Belie

et al. 2020

Sensors

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To mitigate autogenous shrinkage in cementitious materials and simultaneously preserve the material’s mechanical performance, superabsorbent polymers and nanosilica are included in the mixture design. The use of the specific additives influences both the hydration process and the hardened microstructure, while autogenous healing of cracks can be stimulated. These three stages are monitored by means of non-destructive testing, showing the sensitivity of elastic waves to the occurring phenomena. Whereas the action of the superabsorbent polymers was evidenced by acoustic emission, the use of ultrasound revealed the differences in the developed microstructure and the self-healing of cracks by a comparison with more commonly performed mechanical tests. The ability of NDT to determine these various features renders it a promising measuring method for future characterization of innovative cementitious materials.

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“…The reference method for determining the setting time of cement is the needle penetration test [ 11 ]. However, other non-destructive methods have been also proposed for the cement setting assessment, such as the ultrasonic wave transmission method [ 12 , 13 , 14 , 15 ] or acoustic emission methods [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Crystalline Admixtures at Early Age Performance of Cement-Based Mortar by Electrical Resistance Monitoring

2021

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Crystalline admixtures are employed for waterproofing concrete. This type of admixtures can affect the early age performance of cement-based mixes. The electrical resistance properties of cement have been related to the initial setting time and to the hydration development. This paper proposes a system for remote monitoring of the initial setting time and the first days of the hardening of cement-based mortars to evaluate the effect of the incorporation of crystalline admixtures. The electrical resistance results have been confirmed by other characterization techniques such as thermogravimetric analysis and compressive strength measurements. From the electrical resistance monitoring it has been observed that the incorporation of crystalline admixtures causes a delay in the initial setting time and hydration processes. The measurements also allow to evaluate the influence of the amount of admixture used; thus, being very useful as a tool to define the optimum admixture dosage to be used.

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Acoustic Emission Characterization of Fresh Cement-Based Materials

Cited by 7 publications

References 35 publications

The sensitivity of Acoustic Emission (AE) for monitoring the effect of SAPs in fresh concrete

The sensitivity of Acoustic Emission (AE) for monitoring the effect of SAPs in fresh concrete

The Contribution of Elastic Wave NDT to the Characterization of Modern Cementitious Media

Analysis of the Influence of Crystalline Admixtures at Early Age Performance of Cement-Based Mortar by Electrical Resistance Monitoring

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