Experimental evaluation of heat transition mechanism in concrete with subsurface defects using infrared thermography

Pedram, Masoud; Taylor, Su; Hamill, Gerard; Robinson, D. J.; O’Brien, Eugene J.; Uddin, Nasim

doi:10.1016/j.conbuildmat.2022.129531

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…NIR spectroscopy analyze soil chemical and physical properties, including the measurement of organic matter, clay content, and pH. NIR spectroscopy can analyze the composition and quality of asphalt, including the measurement of binder content, aggregate type, and contaminants [100,101]. NIR spectroscopy is used for non-destructive testing of structures, including of measuring moisture content in wood and the detection of cracks and delamination in concrete and other building materials.…”

Section: Near-infrared Spectroscopymentioning

confidence: 99%

“…Acoustic sensors monitor the structural integrity of bridges, buildings, and other The technology uses infrared cameras to detect concrete temperature changes, indicating structural distress, such as cracking or corrosion [100]. These sensors detect and convert the infrared radiation emitted by an object into a visual image that displays the temperature distribution across the surface.…”

Section: Specific Applications Of Acoustic Sensors In Constructionmentioning

confidence: 99%

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Exploring the Potential of Promising Sensor Technologies for Concrete Structural Health Monitoring

Shilar,

Ganachari,

Patil

et al. 2024

Materials

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Structural health monitoring (SHM) is crucial for maintaining concrete infrastructure. The data collected by these sensors are processed and analyzed using various analysis tools under different loadings and exposure to external conditions. Sensor-based investigation on concrete has been carried out for technologies used for designing structural health monitoring sensors. A Sensor-Infused Structural Analysis such as interfacial bond-slip model, corroded steel bar, fiber-optic sensors, carbon black and polypropylene fiber, concrete cracks, concrete carbonation, strain transfer model, and vibrational-based monitor. The compressive strength (CS) and split tensile strength (STS) values of the analyzed material fall within a range from 26 to 36 MPa and from 2 to 3 MPa, respectively. The material being studied has a range of flexural strength (FS) and density values that fall between 4.5 and 7 MPa and between 2250 and 2550 kg/m3. The average squared difference between the predicted and actual compressive strength values was found to be 4.405. With cement ratios of 0.3, 0.4, and 0.5, the shear strength value ranged from 4.4 to 5.6 MPa. The maximum shear strength was observed for a water–cement ratio of 0.4, with 5.5 MPa, followed by a water–cement ratio of 0.3, with 5 MPa. Optimizing the water–cement ratio achieves robust concrete (at 0.50), while a lower ratio may hinder strength (at 0.30). PZT sensors and stress-wave measurements aid in the precise structural monitoring, enhanced by steel fibers and carbon black, for improved sensitivity and mechanical properties. These findings incorporate a wide range of applications, including crack detection; strain and deformation analysis; and monitoring of temperature, moisture, and corrosion. This review pioneers sensor technology for concrete monitoring (Goal 9), urban safety (Goal 11), climate resilience (Goal 13), coastal preservation (Goal 14), and habitat protection (Goal 15) of the United Nations’ Sustainable Development Goals.

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Section: Near-infrared Spectroscopymentioning

confidence: 99%

Section: Specific Applications Of Acoustic Sensors In Constructionmentioning

confidence: 99%

Exploring the Potential of Promising Sensor Technologies for Concrete Structural Health Monitoring

Shilar,

Ganachari,

Patil

et al. 2024

Materials

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“…The second block shown in Figure 1 (b, and d), had two dissimilar rebars with 25mm and 40mm diameter and was coded as Block 2-UER. These blocks were cast with a mix used in previous research by the authors and typical for bridge construction in the UK and Ireland [1,4,[8][9][10]. In addition, sodium chloride equal to 3% mass of cement was dissolved in the water during mixing to simulate highly aggressive environment [11].…”

Section: Reinforced Concrete Blocks and Equipment Of Experimentsmentioning

confidence: 99%

“…The progress of the rebar corrosion causes accumulation of iron oxide at the interface between the rebar and concrete which has higher volume than the steel which subsequently weakens their adhesion and can cause cracking of the concrete [3]. Therefore, it is required to monitor the condition of structure to recognise the onset of corrosion propagation and detect damages at earliest possible stage, preferably by non-destructive techniques and before they progress severely, incur costly rehabilitation and maintenance, endanger lives and cause traffic disruption [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

Quantification of subsurface defects in reinforced concrete of bridges by unsupervised segmentation of IR images

Pedram

Taylor

Hamill

et al. 2023

IABSE Symposium, Istanbul 2023: Long Span Bridges

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<p>This paper presents segmentation analysis of Infrared (IR images of reinforced concrete (RC blocks for characterisation and quantification of corrosion defects using unsupervised clustering. The IR images used in this study were collected during cool down process of RC slabs to laboratory environment temperature through convection heat exchange. The RC slabs were cast from a normal strength mix, typical for bridge construction in the UK and Ireland. The slabs had two steel rebars with protruding ends that were used for accelerated corrosion setups. Unsupervised clustering was conducted on IR images by applying k-means clustering method on normalised temperature readings in a region of interest. In this paper, the performance of clustering method to distinguish between environmental or surface effects and true bridge anomalies is studied, and the corrosion-affected concrete is quantified. Variation of thermal contrast and quantity of defective concrete during the experiments as well as discussion of the results in context provides a basis for improved implementation of IRT for RC structures and contributes to wider objectives of structural health monitoring (SHM).</p>

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Field detection study of the bonding interface bubble defects in the full scale CRTS III slab ballastless track structure

Jiang,

Xie,

Long

et al. 2024

Engineering Structures

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Experimental evaluation of heat transition mechanism in concrete with subsurface defects using infrared thermography

Cited by 9 publications

References 34 publications

Exploring the Potential of Promising Sensor Technologies for Concrete Structural Health Monitoring

Exploring the Potential of Promising Sensor Technologies for Concrete Structural Health Monitoring

Quantification of subsurface defects in reinforced concrete of bridges by unsupervised segmentation of IR images

Field detection study of the bonding interface bubble defects in the full scale CRTS III slab ballastless track structure

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