French term (edited): densite foisonn�e

abounded density

French term (edited): densit� foisonn�e

Not to be confused with "bulk density".

A third soil density factor may be required if remediation planning requires assessment of
costs using soil mass. To convert the estimated excavated soil volumes to estimated soil
mass, an excavation-bulking factor, a site-specific assessment of bulk density, must be
applied. Alternatively, in situ soil density can be measured and applied to the in situ soil
volume estimates to directly estimate soil mass. Published or standard soil density
estimates are not sufficiently accurate for this conversion
www.eub.gov.ab.ca/bbs/documents/bulletins/ Bulletin-2004-34-LFP-Supp2-draftDir001-App2.pdf

Note: bulked density is calculated using adopted average bulking factor of 1.8.
Eastern and Western route sections (surface works) ...
billdocuments.crossrail.co.uk/files/Home/ Home3/01.Environmental%20Statement/Volume_08a/0001_Vol8A_pt4.pdf

It's the can-of-worms syndrome: you have a can of worms of a certain density. You remove the worms from the can, and they acquire a bulked density greater than their in sit density, i.e. you can never get them all back in the can. Same applies the material removed from a trench, etc., even if nothing is put in the hole before it is refilled.

Bulk density, btw, (not the same) is the density of a material occupying a certain volume, i.e. it includes air spaces, etc. Thus, your worms (the animals) or the individual grains of soil will have a certain density of their own. Packed tightly, they will have a certain bulk density, packed more loosely, another.

BulkED (or "reworked") density is in comparison not to the specific density of the materials, but a comparison of a larger bulk density to a smaller one (or more specifically, a smaller bulk density [but bigger volume] to a larger one). Follow?