Shrinkage factors for sand
Shrinkage factors for sand
(OP)
Does anybody have a good rule of thumb for shrinkage factors
for sand. The material is described as coarse to fine with
"some" clay. Moisture content is unknown. Previous development
is unknown but, thought to be original ground. What I am looking for is the difference between the volume of naturally occurring material vs compacted material.
Thanks
for sand. The material is described as coarse to fine with
"some" clay. Moisture content is unknown. Previous development
is unknown but, thought to be original ground. What I am looking for is the difference between the volume of naturally occurring material vs compacted material.
Thanks





RE: Shrinkage factors for sand
Take a nuke test of the native soil.
Determine the in-situ relative compaction.
Contrast that value to what you've specified.
Determine the "shrinkage factor."
You will likely find that the in-situ density is close to what you want to specify. Let's say it's 93 percent and you want 95 to 100. So, that's an increase of about 5 percent.
Usually, shrinkage factors are a more relavent concern when you are trucking in dirt. What's end-dumped in the back of a truck has very low relative compaction. Your shrinkage factor could easily be 15 percent.
Hope this helps.
f-d
¡papá gordo ain't no madre flaca!
RE: Shrinkage factors for sand
in the 200,000 cy range and most of it must be trucked off the
site and wasted. The shrinkage factor will have an equally
important bearing on the total number of truckloads hauled. The haul is long enough to have a serious cost impact.
Thanks again
RE: Shrinkage factors for sand
f-d
¡papá gordo ain't no madre flaca!
RE: Shrinkage factors for sand
RE: Shrinkage factors for sand
Insitu dry density maybe 95% SPD but will vary
RE: Shrinkage factors for sand
If this is borrow to be compacted at another site then both fluff and shrinkage are considerations. A sieve analysis or three (various areas of site) will help characterize the soil's characteristics and can help with the fluff and shrink estimates.
Cheers
RE: Shrinkage factors for sand
RE: Shrinkage factors for sand
with Georgia red dirt and rock. Sand/sand clay mixtures
are out of my league, estimating wise.
RE: Shrinkage factors for sand
f-d
¡papá gordo ain't no madre flaca!
RE: Shrinkage factors for sand
I have worked with wind-blown, hydro-compactive sands that were only up around 7-8%.
RE: Shrinkage factors for sand
has been bid and we were not successful. If I run into
this situation again, I will have the naturally occurring
soil nuked for in place density.
Again, thanks to all.