Shape and size of microfine aggregates: X-ray microcomputed tomography vs. laser diffraction

Date

2007-08-15

Author

Erdoğan, Sinan Turhan
Fowler, D. W.

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Microfine rock aggregates, formed naturally or in a crushing process, pass a #200 ASTM sieve, so have at least two orthogonal principal dimensions less than 75 mu m, the sieve opening size. 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 (mu CT) with a voxel size of 2 mu m. This information is used to generate shape analyses of various kinds. Particle size distributions are also generated from the mu 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 mu CT and laser diffraction can be qualitatively explained.

Subject Keywords

X-ray microcomputed tomography, Laser diffraction, Shape analysis, Size distribution analysis, Spherical harmonic method, Microfine concrete aggregates

URI

https://hdl.handle.net/11511/47149

Journal

POWDER TECHNOLOGY

DOI

https://doi.org/10.1016/j.powtec.2007.02.016

Collections

Department of Civil Engineering, Article

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Citation Formats

S. T. Erdoğan and D. W. Fowler, “Shape and size of microfine aggregates: X-ray microcomputed tomography vs. laser diffraction,” POWDER TECHNOLOGY, pp. 53–63, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47149.