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Shape and Size of Microfine Aggregates: X-Ray Microcomputed Tomography vs. Laser Diffraction



Sinan Erdogan, Edward Garboczi, D Fowler


Microfine aggregates are aggregates, formed naturally or in a crushing process, that pass a #200 ASTM sieve, so are considered to have an equivalent spherical diameter less than about 75 m. In this paper, for the first time we capture true 3-D shape and size data of several different types of microfine aggregates, using X-ray microcomputed tomography (CT) with a voxel size of 2 m. This information is used to generate shape analyses of various kinds. Particle size distributions are also generated from the CT data and quantitatively compared to the results of laser diffraction, which is the leading method for measuring particle size distributions of sub-millimeter size particles. By taking into account the actual particle shape, the differences between CT and laser diffraction can be qualitatively explained.
Advanced Powder Technology


laser diffraction, microfine aggregates, microtomography, particle shape, particle size distribution (PSD)


Erdogan, S. , Garboczi, E. and Fowler, D. (2017), Shape and Size of Microfine Aggregates: X-Ray Microcomputed Tomography vs. Laser Diffraction, Advanced Powder Technology, [online], (Accessed April 23, 2024)
Created November 13, 2017