Pervious concrete use has become the most economical and environmentally friendly alternative to building retention ponds to control storm-water runoff. The Allen roller tube finisher (Circle 910) from Allen Engineering Corp., Paragould, Ark., is a contractor’s preferred tool for striking off pervious concrete on residential and commercial projects.
The roller tube finisher utilizes a spinning tube constructed of 6-in.-diam. structural steel with a rotation speed of up to 250 revolutions per minute. The spinning tube has a weight of only 7 lb per linear ft and can be easily handled by only two operators. If more weight is needed, the tube can be filled with water. The roller tube finisher is powered by an 85-cc, two-cycle engine power unit or an 11-hp, 4.5-gal-per-minute hydraulic power unit.