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为确保沥青混合料集料骨架结构的形成,需要找到一种与路面沥青混合料相近的粗集料密实成型方法。基于彩色阈值分割技术,准确提取粗集料颗粒,根据颗粒的积聚状态特点,利用粗颗粒长轴与X轴正方向的夹角角度为评价指标,研究振实、捣实和旋转压实3种粗集料密实方法的粗集料堆积形态,并与沥青混合料试件粗颗粒长轴夹角进行对比。结果表明:基于彩色图像处理技术,避免了大颗粒被判断为小颗粒的误差,保证全部粗集料颗粒均被有效提取。捣实法粗集料夹角明显小于沥青混合料试件统计结果,粗集料松方振实法与沥青混合料试件颗粒长轴夹角统计结果数据最为接近,与捣实和旋转压实相比,是一种更为准确的粗集料密实方法。
In order to ensure the formation of aggregate structure of asphalt aggregate, it is necessary to find a method of dense solidification of coarse aggregate close to the asphalt mixture on pavement. Based on the color thresholding technique, the coarse aggregate particles were accurately extracted. Based on the characteristics of the particle accumulation state, the angle between the long axis of the coarse particles and the positive X-axis was used as the evaluation index to study the effects of taping, tamping and rotary compaction Coarse aggregates compact method of coarse aggregate accumulation morphology, and coarse particles with asphalt mixture specimens long axis angle comparison. The results show that based on the color image processing technology, the error that the large particles are judged as small particles is avoided, and all the coarse aggregate particles are effectively extracted. The compaction method coarse aggregate angle is significantly less than the asphalt mixture specimen statistical results, the coarse aggregate pine square vibration method and the bituminous mixture specimen long axis angle of the statistical data is closest to, and tamping and rotary compaction phase Than, is a more accurate coarse aggregate compact method.