Qualitative assessment of concrete by ultrasound tomography

Haach, Vladimir Guilherme; Ramirez, Fernando Campo

doi:10.1016/j.conbuildmat.2016.05.056

Cited by 59 publications

(32 citation statements)

References 21 publications

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“…The fidelity of this method depends on the process of acquisition and pre-processing of the data through mathematical methods of reconstruction. The generation of tomographic images can be categorized in techniques of filtered rear projection and iterative reconstruction [38].…”

Section: Ultrasonic Pulse Tomographymentioning

confidence: 99%

“…The authors [38] report that changes in compressive strength of concrete lead to different propagation velocities, with the velocity reducing with increasing resistance. In parallel, they concluded that the relatively uniform distribution of ultrasound velocities observed indicates that the tomographic technique for assessing the uniformity of concrete structures is adequate, and the analysis of the homogeneity of the concrete by ultrasonic tomography is more efficient than the simple analysis of velocity values of the waves.…”

Section: Ultrasonic Pulse Tomographymentioning

confidence: 99%

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Degradation Monitoring Systems for a BIM Maintenance Approach

Romano¹,

Brito²

2019

Sustainable Construction and Building Materials

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Digitization allows to develop unprecedented technological systems based on the use of sensors, robotics, and automation. The construction industry is involved in this process of integrating new technologies through a platform called Building Information Modeling (BIM), which simplifies the management of the increasing complexity of construction processes. This methodology aims to create a global interactive system of information sharing between the different actors in the construction process. The integration of the processes creates economic and environmental opportunities, which can translate into increased efficiency of the sector. The information collected can be used throughout the construction lifecycle, which together with the monitoring of the buildings will support maintenance decisions. The monitoring of reinforced concrete structures with sensors allows the identification and quantification of the degradation processes, through the monitoring of several characteristic parameters of the reinforced concrete over time, and the determination of significant changes that indicate the existence of a degradative process in development. Obtaining this type of information, and its integration into BIM models, will allow intervention at an early stage in order to limit damages and costs associated with the maintenance of the structure, contributing to increase in the structure's useful life.

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Section: Ultrasonic Pulse Tomographymentioning

confidence: 99%

Section: Ultrasonic Pulse Tomographymentioning

confidence: 99%

Degradation Monitoring Systems for a BIM Maintenance Approach

Romano¹,

Brito²

2019

Sustainable Construction and Building Materials

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“…Let us consider a reinforced concrete element, for example a vertical one such as a pillar or a wall, in which a segregation phenomenon occurred during hardening, determining the formation of a volume full of cavities that can be assimilated by size to the MC of the test. This kind of defect is commonly simulated by means of embedded voids [58][59][60][61][62] as the MC of the test. Figure 16 shows the overestimate of the usable cross section of the element net of the section of the defect as a function of the size of the defect and of the I index reported in Table 3.…”

Section: Commentsmentioning

confidence: 99%

Concrete Defects Sizing by Means of Ultrasonic Velocity Maps

Concu

Trulli

2018

Buildings

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The paper illustrates the results of an experimental test which intends to check the efficacy of ultrasonic testing (UT) in detecting anomalies inside concrete elements. For this purpose, UT has been carried out on a small concrete wall having different defects deliberately settled inside the wall during casting. A grid of several measurements points has been arranged on the wall surfaces and for each point the ultrasonic signal has been acquired after passing through the thickness of the wall and the propagation velocity V has been extracted and analyzed. A graphic representation of V distribution has been implemented by a map where each pixel identifies one measurement point and is representative of its neighborhood. This map highlights areas with different velocity values, and allows to visually detect areas having particularly low velocity. The matching between the low-velocity areas and the artificial defects has been analyzed, and the level of accuracy of the V map in detecting and sizing the concrete inner defects has been discussed with reference to different spacing of the grid points. Finally, some considerations regarding the choice of the most suitable measurements grid have been addressed.

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“…In time domain, the velocity of the ultrasonic signals (derived out of the “time of flight”) is an important parameter of the signal . Other useful information for the characterization or monitoring of concrete structures, mainly based on coda waves, can be provided by the amplitude or energy of the full signal waveform in terms of coda wave interferometry .…”

Section: Introductionmentioning

confidence: 99%

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Snoeck

Malm

Cnudde

et al. 2018

Adv Materials Inter

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When studying the self‐healing properties of construction materials, a plethora of destructive and nondestructive testing (NDT) techniques can be used. In this review, the applicability of different nondestructive test methods is discussed in detail. The methods can be categorized whether they are used to study the encapsulation and/or protection mechanism of the healing agent, the sequestered healing agent itself, the distribution of healing agents, the trigger mechanism for healing, the healing efficiency, or healing performance. Based on this categorization, nondestructive techniques found in literature are discussed. In this way, a robust understanding of the different techniques can be used for future research on self‐healing construction materials.

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Qualitative assessment of concrete by ultrasound tomography

Cited by 59 publications

References 21 publications

Degradation Monitoring Systems for a BIM Maintenance Approach

Degradation Monitoring Systems for a BIM Maintenance Approach

Concrete Defects Sizing by Means of Ultrasonic Velocity Maps

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

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