Chunkers/Grizzlys

Setting up a Concrete/Asphalt recycle yard and was curious if anyone on here has utilized "chunkers or grizzly's" to help pre-screen material to help minimize time sorting it all out with trackhoe and loaders. my thoughts are to build your typical ramp and build a large chunker at the top for the dump trucks to dump over it when dropping off material. this would leave me a clean pile of larger chunks and a dirty pile with say an 8" minus. i think the 8" minus pile would be good for your subbase material or roadstones and the larger cleaner pile would be easier to meet gradation on certain products. Any Thoughts???/