Evaluation of seal coat performance using macrotexture measurement

The purpose of this research project is to develop an objective technique to accurately evaluate pavement distresses including raveling (loss of aggregate) and excess binder (flushing or bleeding). Current methods available to evaluate seal coat distresses are very subjective and they include visual inspection by different people. This method is subject to different interpretation by the different inspectors with different levels of knowledge and experience on pavement distresses. Currently, there is no method based on equipment measurements to scientifically evaluate the performance of seal coats and reduce the subjective ness of seal coat performance evaluations. A methodology based on texture could be an option to measure seal coat performance as affected by flushing and raveling