Computed tomography in the fatigue test analysis of an asphaltic mixture

Braz, Delson; Motta, Laura Maria Goretti da; Lopes, Ricardo Tadeu

doi:10.1016/s0969-8043(98)00122-5

Cited by 54 publications

(16 citation statements)

References 10 publications

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“…Computed tomography applications have not been limited to the fields of medicine [2][3][4][5][6][7]. CT produces a volume of data that can be manipulated in order to demonstrate various bodily structures, therefore CT is used for nondestructive material analysis as well.…”

Section: Computed Tomographymentioning

confidence: 99%

“…In recent years, CT imaging has been increasingly extended to the structural characterization of asphalt concrete [5,8,9], cement concrete [10,11], and rock [12,13]. It can be used to reconstruct the 3D structure of a sample for computer simulation of the performance of the material under various loading and environmental conditions.…”

Section: Computed Tomographymentioning

confidence: 99%

See 1 more Smart Citation

Air Void Distribution of Asphalts Determined by Computed Tomography

Lublóy

Ambrus

Kapitány

et al. 2015

Period. Polytech. Civil Eng.

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Section: Computed Tomographymentioning

confidence: 99%

Section: Computed Tomographymentioning

confidence: 99%

Air Void Distribution of Asphalts Determined by Computed Tomography

Lublóy

Ambrus

Kapitány

et al. 2015

Period. Polytech. Civil Eng.

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“…Several investigators have illustrated the use of CT scans for the nondestructive evaluation of soils (Petrovic et al 1982;Aylmore and Hainsworth 1983;Alshibli et al 2000;Halverson et al 2005). CT imaging has gained increasing applications in civil engineering materials research in recent years (Braz et al 1999;Shashidhar 1999;Hall et al 2000;Wang et al 2001;Masad and Button 2004;Wang et al 2004b).…”

Section: X-ray Computed Tomographymentioning

confidence: 99%

“…Braz et al (1999; applied computerized tomography techniques to detect and follow the evolution of a crack, when an asphalt mixture is submitted to fatigue testing. Tashman et al (2004) used CT to capture the microstructure of HMA specimens before and after loading in triaxial compression tests at high temperatures and used image analysis techniques to characterize the evolution of air voids and cracks throughout the deformation process.…”

Section: Damage Evolutionmentioning

confidence: 99%

Characterization of Asphalt Materials Using X-Ray High-Resolution Computed Tomography Imaging Techniques

Gopalakrishnan¹,

Ceylan²,

Inanc³

et al. 2006

Airfield and Highway Pavement

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X-ray Computerized Tomography (CT) has emerged as a powerful, nondestructive tool to study and quantify the three-dimensional internal structure of HMA. Studies, in conjunction with modeling and computational techniques, have focused on characterization of HMA internal air-void distribution, internal structure evolution during laboratory compaction, damage evolution in specimens during laboratory tests, segregation analysis, forensic investigation of pavements using cores, and the quantification of HMA microstructural properties. The Center for Nondestructive Evaluation (CNDE) at Iowa State University (ISU) has an inhouse built high-resolution CT system with customized software for data acquisition, volumetric file reconstruction, and visualization. Preliminary studies were conducted at the CNDE to investigate the capabilities and resolution levels of the imaging systems in studying asphalt materials. Researchers at both ISU and Iowa Department of Transportation are currently using the advanced imaging facilities available at the CNDE and the latest developments in image analysis techniques to develop a deeper understanding of the HMA internal structure, develop and optimize the various parameters that describe the internal structure and relate them to the performance of pavements in a scientific way. This will provide the foundations to building more durable and long-lasting pavements. This conference proceeding is available at Iowa State University Digital Repository: http://lib.dr.iastate.edu/ccee_conf/25Reference to this paper should be made as follows: Gopalakrishnan, K., Ceylan, H., Inanc, F., and Heitzman, M. Abstract X-ray Computerized Tomography (CT) has emerged as a powerful, nondestructive tool to study and quantify the three-dimensional internal structure of HMA. Studies, in conjunction with modeling and computational techniques, have focused on characterization of HMA internal air-void distribution, internal structure evolution during laboratory compaction, damage evolution in specimens during laboratory tests, segregation analysis, forensic investigation of pavements using cores, and the quantification of HMA microstructural properties. The Center for Nondestructive Evaluation (CNDE) at Iowa State University (ISU) has an in-house built high-resolution CT system with customized software for data acquisition, volumetric file reconstruction, and visualization. Preliminary studies were conducted at the CNDE to investigate the capabilities and resolution levels of the imaging systems in studying asphalt materials. Researchers at both ISU and Iowa Department of Transportation are currently using the advanced imaging facilities available at the CNDE and the latest developments in image analysis techniques to develop a deeper understanding of the HMA internal structure, develop and optimize the various parameters that describe the 1 Reference to this paper should be made as follows: Gopalakrishnan, K., . "Characterization of Asphalt Materials using X-ray High-Resolution Computed Tomography Imaging...

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“…The industrial application of CT may ultimately far exceed its medical applications. CT methods have been used in many other areas in recent years such as application in soil science [3,4], studies of living trees to measure growth rings [5], detection of structural defects and others heterogeneities in polymer objects [6], studies of asphaltic mixture in the fatigue test analysis [7], application of gamma ray transmission in studies of water vertical ascending infiltration samples of concrete for popular habitation [8,9], etc. Civil construction industry has used in recent years, non-destructive tests to evaluate concrete structure without causing any further damage to the structure.…”

Section: Introductionmentioning

confidence: 99%

Analysis of concrete material through gamma ray computerized tomography

Oliveira¹,

Martins²,

Milito³

2004

Braz. J. Phys.

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Computerized Tomography (CT) refers to the cross sectional imaging of an object from both transmission or reflection data collected by illuminating the object from many different directions. The most important contribution of CT is to greatly improve abilities to distinguish regions with different gamma ray transmittance and to separate over-lying structures. The mathematical problem of the CT imaging is that of estimating an image from its projections. These projections can represent, for example, the linear attenuation coefficient of γ-rays along the path of the ray. In this work we will present some new results obtained by using tomographic techniques to analyze column samples of concrete to check the distribution of various materials and structural problems. These concrete samples were made using different proportions of stone, sand and cement. Another set of samples with different proportions of sand and cement were also used to verify the outcome from the CT analysis and the differences between them. Those samples were prepared at the Material Laboratory of Faculdade de Engenharia de Sorocaba, following the same procedures used in real case of concrete tests. The projections used in this work was obtained by Mini Computerized Tomograph of Uniso (MTCU), located at the Experimental Nuclear Physics Laboratory at University of Sorocaba. This tomograph operates with a gamma ray source of 241 Am (photons of 60 keV and 100 mCi of intensity) and a NaI(Tl) solid state detector. The system features translation and rotation scanning modes, a 100 mm effective field of view, and 1 mm spatial resolution. The image reconstruction problem is solved using Discrete Filtered Backprojection (FBP).

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Computed tomography in the fatigue test analysis of an asphaltic mixture

Cited by 54 publications

References 10 publications

Air Void Distribution of Asphalts Determined by Computed Tomography

Air Void Distribution of Asphalts Determined by Computed Tomography

Characterization of Asphalt Materials Using X-Ray High-Resolution Computed Tomography Imaging Techniques

Analysis of concrete material through gamma ray computerized tomography

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