Abstract: A system and method for the application of friction-modifying coatings to roadways, walkways, pathways and other areas subject to vehicular, human or animal traffic, the system and method comprising the controlled, simultaneous application of binder and filler to a surface of a substrate, using a mobile device which passes over the substrate as the binder and filler are being applied. The system includes a mobile platform configured for being coupled to a vehicle. A binder applicator is mounted on the mobile platform and includes an array of spray nozzles coupled to a resin container. An air knife is mounted on the mobile platform and coupled to an air compressor for generating an air curtain. An aggregate dispenser bar including at least one aggregate dispenser is coupled to an aggregate bin and mounted on the mobile platform for dispensing aggregate.

Abstract: A sluice assembly for separating heavy particles from slurry is provided. The sluice assembly includes one or more sluice boxes having decks made of plastic having a Shore D hardness between 50-75, a static coefficient of friction less than 0.3 and a kinetic coefficient of friction less than 0.2. In a preferred embodiment, the sluice assembly includes a pair of sluice boxes in which a top sluice box is positioned above the bottom sluice box so that slurry flowing from the downstream end of the first sluice box is received by the upstream end of the bottom sluice box. The bottom deck includes tapered riffles which are arranged to provide “V” shaped diverters for diverting heavier particles for collection. The sluice box upper deck may include laterally extending riffles for collection of heavier particles.