Skid resistance, a very important characteristic of highway pavements, is highly influenced by pavement macrotexture and Microtexture. Microtexture is a function primarily of aggregate texture characteristics, while macrotexture depends on aggregate gradation, mix design, and compaction. A methodology was developed in this study to relate aggregate texture to pavement microtexture and skid resistance. The methodology relies on measuring the initial aggregate texture and the change in texture after various levels of polishing in order to predict the aggregate ability to retain its microtexture in the pavement. The new method is unique as it relies on image analysis techniques that are capable of separating the multi scales of texture and identifying those scales that are related to microtexture and friction.
The final report for this IDEA project can be found at: