This paper presents a laboratory and field study of the evolution of the skid resistance of different asphalt surfacing materials. A trial section was laid in September 2006 on a dual carriageway road located in the UK and subjected to heavy traffic conditions. Three different types of mixtures with 14, 10 and 6 mm maximum aggregate sizes and two different aggregate sources were used in the trial. In-situ measurements of skid resistance were carried out periodically using SCRIM and GripTester. Surface texture was also monitored using a laser sensor fitted to the SCRIM machine. Skid resistance values showed good material performance during the first 4 years since installation. Furthermore, surface texture values showed a decrease in texture for the relatively open 14 mm materials whereas no change in texture was practically observed for the denser 10 mm materials. Laboratory measurements of skid resistance were also carried out using the Wehner-Schulze (WS) device. This device is used to determine the friction of an aggregate or asphalt specimen after a polishing period. It was found that the WS ranked the mixtures in the same way as the in-situ methods whereas the PSV test did not. The WS was also used to predict the evolution of the skid resistance with traffic loading. Comparisons were then made between the predicted and measured skid resistance values. It was found that the WS device is a reliable tool for predicting the deterioration of friction due to traffic. Further work is, however, needed to relate laboratory measurements to in-situ methods.
|Title of host publication||Unknown Host Publication|
|Number of pages||11|
|Publication status||Published - 2012|
|Event||5th Eurasphalt & Eurobitume Congress - Istanbul|
Duration: 1 Jan 2012 → …
|Conference||5th Eurasphalt & Eurobitume Congress|
|Period||1/01/12 → …|