Three dimensional particles identification and shape parameters research on coarse aggregates of asphalt mixture using X-ray CT images |
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Authors: | DUAN Yue-hu ZHANG Xiao-ning ZHANG Shun-xian and YUAN Miao-miao |
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Affiliation: | 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China;Guangdong Hualu Communications Technology Co., Ltd., Guangzhou 510420,China 2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China |
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Abstract: | In this paper a series of digital image processing methods were adopted for getting separated coarse aggregates from asphalt mixture specimen using high-resolution X-ray Computed Tomography(CT)images.The existing three dimensional(3D)particles matching methods based on two dimensional(2D)continuous crosssections were analyzed and a new 'overlap area method' was presented.After the 3D particles were extracted one by one successfully,the basic parameters of each aggregate:perimeter,area,surface area,and volume were calculated by chain code method.Finally,the 3D mass center coordinates and the sphericity index were introduced. |
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Keywords: | asphalt mixture X-ray CT three dimensional matching chain code sphericity |
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