Advances in Computed Tomography for Geomaterials: GeoX 2010

3D Aggregate Evaluation Using Laser and X-ray Scanning

L. Wang¹ — C. Druta² — Y. Zhou³ — C. Harris³

¹ The Via Department of Civil and Environmental EngineeringVirginia Polytechnic Institute and State University301N Patton Hall, Blacksburg, VA 24061, [phone]

 

² Virginia Tech Transportation Institute (VTTI)Center for Sustainable Transportation Infrastructure3500 Research Transportation PlazaBlacksburg, VA 24061, [phone]

 

³ The Via Department of Civil and Environmental EngineeringVirginia Polytechnic Institute and State University200 Patton Hall, Blacksburg, VA 24061(540) 231-6527; [phone]; [e-mail]

ABSTRACT. In this paper, two scanning systems, an x-ray-based and a laser-based system, have been evaluated in terms of its capability in accurately acquiring three-dimensional (3D) surface data and their potential in evaluating fine and coarse aggregates. The dimension measurements, surface area and volume quantification capability of the two systems was evaluated through comparing these measurements with caliper measurements, theoretical calculations and other proved methods. The evaluations indicate that both the x-ray scanning method and laser scanning method can yield very high resolution up to 6 to 60 µm in determining the dimensions of aggregates, allowing for accurate characterization of the derived characteristics of aggregate shape, angularity and texture in true 3D.

 

KEYWORDS: aggregate characterization, ...