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The fractal arrangement of hydrated cement paste

Authors
Journal
Cement and Concrete Research
0008-8846
Publisher
Elsevier
Publication Date
Volume
25
Issue
1
Identifiers
DOI: 10.1016/0008-8846(94)00122-f
Disciplines
  • Mathematics

Abstract

Abstract Data from small-angle X-ray scattering experiments are used to determine the fractal types and dimensions of hydrated portland cement pastes over a range of length scales. The larger-scale, 200–1500 Å, geometry at most degrees of water saturation is found to be that of a rough surface fractal. The smaller-scale, 30–200 Å, geometry is found to be a mass fractal in saturated pastes. This geometry changes gradually with drying, and becomes a rough surface fractal at saturations less than about 50%. Completely oven dried pastes are found to have a considerably altered geometry.

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