Thin, Applied Surfacing for Improving Skid Resistance of Concrete Pavements

摘要

The use of select aggregate in a thin wearing surface of portland cement mortar to prolong or restore a concrete pavement's ability to develop high friction was accomplished in this project. Two fine aggregates, blast furnace slag and lightweight expanded shale were found to exhibit skid resistances greater than the other aggregates evaluated. The British Polishing Wheel was used in the Laboratory evaluation of aggregate to simulate wear. The need for a method of restoring friction to a worn, but otherwise sound, concrete pavement led to a field evaluation of several different techniques for placing a very thin overlay. The successful method was a broomed, very thin layer of mortar, 3 mm thick.