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为了研究沥青混合料内部集料结构,利用CT断层扫描技术对沥青混合料内部集料进行三维重构,基于Matlab(自行编制程序对集料进行识别与分离。很多情况下集料是互相接触的,这些相互接触的集料容易被程序错误地识别成是一个集料。为此首先用Gaussian过滤器使集料变得更光滑,再利用Hmax过滤器使集料变得更平滑,最后进行Watershed过滤器把连接在一起的集料截段进行识别与分离。通过不同试验对这一方法进行了论证。基于此,利用CT断层扫描分析实际的沥青混合料。从计算出来的集料体积信息可以看出,与混合料内部集料级配情况是相符的。研究结果表明基于CT技术沥青混合料集料的三维识别与分离是可行的,为进一步研究沥青混合料压实过程中集料运动方向、离析和级配变化等打下了坚实的基础。
In order to study the internal aggregate structure of asphalt mixture, CT aggregate tomography was used to reconstruct the internal aggregates of asphalt mixture by using CT tomography, and the aggregates were identified and separated based on Matlab (in many cases, the aggregates were in contact with each other , These interjacent aggregates are easily mistakenly identified by the program as an aggregate.To do this the Gaussian filter is used first to make the aggregate smoother and then the Hmax filter is used to make the aggregate smoother and finally Watershed The filter identifies and separates the aggregated sections that are connected together, and this method is demonstrated by different experiments based on which CT tomography is used to analyze the actual asphalt mixture. From the calculated aggregate volume information, The results show that the three-dimensional identification and separation of asphalt aggregate based on CT technology is feasible. In order to further study the direction of aggregate movement during asphalt mixture compaction , Segregation and gradation change laid a solid foundation.