Abstract
Particle morphology which affects the packed state of particles is a factor that cannot be ignored in the study of gradation model. Floating beads, as the most commonly lightweight additive used in cement slurry, are always regarded as ideal spherical particles, thus the effects of its circular degree on close packing are overlooked. In order to quantitatively characterize the circularity of floating beads , based on image processing methods of powder particles, combined with image processing software(Photoshop and MATLAB), replaced the watershed segmentation method with removing linking particles, the calculating method of the circularity of powder particles was put forward, and finally the average circularity of floating beads was obtained (about 0.929＜1). Although floating beads have high spherical degree, they still aren’t ideal spherical particles, so their morphology feature should not be ignored in the study of particle size distribution.
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