What is Dense Graded Base?

What is Dense Graded Base?

Dense graded base or DGB for short, is a mechanically crushed rock aggregate. The particle size distribution is engineered so that when compacted, the resulting voids between the aggregate particles, expressed as a percentage of the total space occupied by the material, are very small.

In a nutshell you get a well graded mix of coarse and fine rock to enable a super compact base material.