Crushed Concrete Density?
Crushed Concrete Density?
(OP)
Just wondering if anyone has a good average density for crushed concrete pavement. Our crusher makes it into 4-6" aggregate and I'm trying to convert cubic yards to tons. Also, I have the same question about Recycled Asphalt Pavement..anyone have a density for that? Thanks for any help.





RE: Crushed Concrete Density?
If it were crushed in the manner of a graded aggregate base material, the density would be upwards of 120+ pcf.
RAP will be somewhere in the 90 to 95 pcf range, depending on gradation.
RE: Crushed Concrete Density?
RE: Crushed Concrete Density?
i've seen heavier RAP (i want to say it ran about 125-130 pcf compacted but i'd have to double check since it's from a soil cement job i did a few years back)
RE: Crushed Concrete Density?
I have not seen any recycled concrete base that large used for roadway base. Largest has been 0-10% retained on the 1-3/4".
Also have not seen any RAP used as a base material. Did use an Iron Ore / RAP blend on a project (mostly I.O.) and the Da was around 135 pcf.
RE: Crushed Concrete Density?
RE: Crushed Concrete Density?
RE: Crushed Concrete Density?
You discovered the high variability of the density of larger particles. The weight/density of 82 pcf could be accurate for that sample.
Large (4" -6") pieces of concrete are generally cubical and angular.
The in-place density depends on the size and shape of the individual particles. Large pieces with no fines will give you a very low density (pcf) unless you have the optimum amount of fines of the correct gradation. - A one cubic meter of large spheres has a give weight. You can add a large amount of "marbles" in between the "grapefruit" and increase the weight of the cubic meter of materials without any compaction.
Cubic materials can be difficult to compact the solids because of the shape and friction. Physical vibration(compaction) does little to increase the density of large particles, while moisture and vibration can get much higher densities approaching 145 pcf.
RE: Crushed Concrete Density?