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

Erdogan S. T., Garboczi E. J., Fowler D. W.

POWDER TECHNOLOGY, cilt.177, sa.2, ss.53-63, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 177 Sayı: 2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.powtec.2007.02.016
  • Dergi Adı: POWDER TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.53-63
  • Anahtar Kelimeler: X-ray microcomputed tomography, laser diffraction, shape analysis, size distribution analysis, spherical harmonic method, microfine concrete aggregates, PARTICLE-SHAPE, WIDE-RANGE, MICROSTRUCTURE
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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. (C) 2007 Elsevier B.V. All rights reserved.