Abstract
ABSTRACT When skid resistance is found inadequate on an airport runway pavement, both high-speed and low-speed skid resistance characteristics of the pavement will have to be examined to determine the actual cause of the problem. Unfortunately, the widely used low-speed skid resistance measuring device, namely British Pendulum Tester (BPT), is not suitable for testing grooved pavements which are a common form of runway pavement construction. To solve the limitations of BPT, a Walking Friction Tester (WFT) was developed to test the low-speed skid resistance performance of airport runway pavements. Laboratory skid resistance tests using BPT and WFT were conducted on asphalt and concrete specimens, five of which were textured with standard square grooves and trapezoidal grooves. It was found that WFT produced more consistent measurements than BPT with smaller coefficient of variation values. Further tests were performed to examine the variability of WFT test results with respect to walking speed and water film thickness respectively. It was found that WFT test results were not affected by changes in walking speeds of operators and water film thickness. Therefore, it can be concluded that WFT is a better method for low-speed skid resistance evaluation of runway pavement.
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