How does the Rubble Master create a gradable aggregate in one pass?
When recycling concrete or asphalt or while crushing natural aggregate the design of the Rubble Master impact crusher utilizes reduction ratios commonly associated with impact crushers. Since common gradations of a gradable base aggregate range in size from ¾” to 1 ½” these material specifications can be met as long as the feed material is properly sized. Horizontal Impact crusher reduction ratios of 20:1 are common and therefore when a 1″ base material size is required the feed size of about 20″ will produce this gradable aggregate. Feeding material larger than this will result in a larger finished material size as well as a reduction in productivity. With the closed circuit design of the RM80 / RM100 Compact Recyclers, the majority of this material meets the specification in one pass while any over sized material is recirculated back through the crusher sizing the material with in the proper size range. The Rubble Master crusher’s unique crushing chamber design maximizes the reductio
