Study on decay behavior of asphalt pavement skid resistance performance

This paper presents the findings from a pavement performance study based on ten years continuous tracking observation of the decay behavior of pavement skid resistance performance over 3,000km expressway in the northeast province of China. Based on skid resistance index data collected from 30,000km of expressway lane, combined with historical record, and statistical analysis, correlation between the skid resistance index (SRI) of AC-13 asphalt pavement material and its performance decay in the expressway life cycle has been preliminarily established. Meanwhile, combined with relevant factor indexes, such as structure depth (SD), British pendulum number (BPN), dynamic friction (DF), and polished stone value (PSV), are included in further specific survey and analysis study of representative road sections, to fit each of the indexes early performance attenuation trend, combine with in-depth analysis of correlativity between each of the indexes. Based on statistical field data analysis, an important conclusion is drawn that there is no significant correlativity between macro-index and micro-index. Therefore, it is recommended that both SD and DF should be added to the evaluation of the skid resistance performance, including minimum normalized value of each of the indexes for maintenance management. Meanwhile, a judgement method is proposed to forecast attenuation of SRI by using key indexes of SD, BPN, and PSV.