New method to quantitatively evaluate the homogeneity of asphalt mixtures

作者：Wu, Wen-Liang^*; Zhang, Xiao-Ning; Wang, Duan-Yi; Li, Zhi

来源：Journal of Harbin Institute of Technology, 2009, 16(4): 537-540.

• Area ratios
• Digital image processing technique
• Fine aggregates
• Homogeneity
• Random distribution
• Research results

To evaluate the homogeneity of asphalt mixtures, the images of sections obtained by cutting the asphalt mixtures specimen horizontally or vertically were analyzed with digital image processing techniques, and the particle area ratio was achieved by applying sector scan for horizontal specimen and vertical scan for vertical one. The research result indicates that the influence of random distribution of aggregates in cutting the specimen can be eliminated by using colored aggregates to distinguish coarse and fine aggregates and using color threshold to segment the images. Choosing three typical gradations, proving particle area ratio obeying normal distribution and using the variability of particle area ratio as an index, it is feasible to quantitatively evaluate the homogeneity of asphalt mixtures.

• 出版日期2009-8
• 单位华南理工大学