Correlation of Fine Aggregate Imaging Shape Indices with Asphalt Mixture Performance

Masad, Eyad; Olcott, Dana; White, Thomas D.; Tashman, Laith

doi:10.3141/1757-17

Cited by 160 publications

(55 citation statements)

References 17 publications

(12 reference statements)

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“…For example, Buchanan (2000) investigated the effect of flat and elongated particles on the performance of hot mix asphalt mixtures. Masad et al (2001) pointed out that aggregate texture of fine particles had the strongest correlation with mixture performance among different aggregate shape properties, while Fletcher (2002) showed a similar strong relationship between the texture of coarse aggregates and material performance. Wang et al (2003) recently used Fourier morphology analysis from aggregate profiles to evaluate the aggregate characteristics.…”

Section: Introductionmentioning

confidence: 97%

Parametric Model Study of Microstructure Effects on Damage Behavior of Asphalt Samples

Dai¹,

Sadd²

2004

International Journal of Pavement Engineering

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This paper presents a computational modeling study of the microstructural influence on damage behavior of asphalt materials. Computer generated asphalt samples were created for numerical simulation in indirect tension and compression testing geometries. Our previously developed micromechanical finite element model was used in the simulations. This model uses a special purpose finite element that incorporates the mechanical load-carrying response between neighboring aggregates. The element was developed from an approximate elasticity solution of the stress and displacement field in a cementation layer between particle pairs. The computational model establishes a network of such elements to simulate an asphalt mass. Continuum damage mechanics was then incorporated within this scheme leading to the construction of a micro-damage model capable of predicting typical global inelastic behavior found in asphalt materials. A series of model asphalt samples have been generated and simulated with controllable microstructure variation in an effort to determine the effects of particular microstructural variables on the material response. These simulations explored the relationship between microstructure parameters and damage behavior of particular asphalt samples.

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Section: Introductionmentioning

confidence: 97%

Parametric Model Study of Microstructure Effects on Damage Behavior of Asphalt Samples

Dai¹,

Sadd²

2004

International Journal of Pavement Engineering

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“…Rao and Tutumluer ͑2000͒ developed an image analyzing system using three cameras at orthogonal views to measure the volume of an aggregate as well as the aspect ratios. Similar research was conducted by Masad et al ͑2001͒. A laser based scanning system has been proposed by Kim et al ͑2000͒.…”

Section: State Of Art In Image-based Measurementsmentioning

confidence: 53%

Technical and Computational Aspects of the Measurement of Aggregate Shape by Digital Image Analysis

Maerz

2004

J. Comput. Civ. Eng.

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Aggregates need to pass numerous tests to ensure the performance of asphalt and concrete structures and pavements. Some of these tests are fairly onerous, requiring manual, labor intensive, cost ineffective measurements that do not provide significant statistical validity, and are prone to errors through ignorance, negligence, or even in some cases through deliberate misrepresentation. This paper presents a vision based alternative to measure the shape of aggregate particles. The system, although requiring increased capital investment, will result in objective, cost effective, and timely testing of aggregate shape. The system uses dual, synchronized, double speed progressive scan cameras to image the aggregate piece from two directions. A dual image acquisition card simultaneously digitizes both images and does real-time thresholding to create a binary image, which is ported to the host computer. A software trigger determines the presence of an aggregate piece in the image, and the boundaries of the piece are delineated by a perimeter-walking routine. Measurements of aspect ratio and minimum curve radius are made on the perimeter array, and are compared to flat and elongated tests, coarse aggregate angularity ͑uncompacted voids͒, compacted voids, and fractured face counts.

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“…However these CT examinations were based only on imagery, without comparison to laboratory tests. In asphalt mixes, particle shape significantly influences the initial compaction and subsequent performance [18,19]. Bessa, Castelo Branco and Soares [20] studied the inner structure and grain shape of different aggregates and gradations.…”

Section: Ct Application For Testing Asphaltmentioning

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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Correlation of Fine Aggregate Imaging Shape Indices with Asphalt Mixture Performance

Cited by 160 publications

References 17 publications

Parametric Model Study of Microstructure Effects on Damage Behavior of Asphalt Samples

Parametric Model Study of Microstructure Effects on Damage Behavior of Asphalt Samples

Technical and Computational Aspects of the Measurement of Aggregate Shape by Digital Image Analysis

Air Void Distribution of Asphalts Determined by Computed Tomography

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