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Soil Compaction

Soil Compaction

Soil Compaction

What is the process to measure soil compaction?

RE: Soil Compaction

The question is a bit broad.  Provide more info to narrow the scope of the question, such as:

Do you have a standard to meet?
Are you testing compacted fill or do you want to know the in-place density of existing soil?
Is this for roadway or building work?
Will the testing be done at the surface or subsurface?

RE: Soil Compaction

1. measure unit weight of material that has been compacted to theoretical maximum (in lab)

2. measure unit weight of material compacted in the field

3. compare the two unit weights to get the percent of maximum

RE: Soil Compaction

The process to measure soil compaction is this:

1)  Obtain a sample of the soil being compacted.

2)  Perform a proctor ASTM D1556 on the soil being compacted in your local materials testing laboratory.  

3)  Use the proctor value and any of a number of methods of testing the compacted soil.  The most common of these methods includes a nuclear density gauge, and the sand cone method.

That's the long and short of it.   

RE: Soil Compaction


Does you firm work with geotechs when designing your projects?  I'm sure the geotech firm would be willing to give you or your office a little review session on soils basics. Usually geotechs provide recommendations to the structural engineers for use in designing the proposed foundations and performing required earthwork operations.  It would be to everyone's benefit if each party better understood the other.

RE: Soil Compaction

I second PEInc's comment.  We can't give you enough information in this forum; you need to spend a (minimum of a) few hours with a local geotechnical engineer in order to get a handle on this topic.

RE: Soil Compaction

Why not do a search on the various previous threads ?  - there are a lot on compaction (e.g., Thread274-5909 )  Type in "Compacation" on "Key Word Search" and I think that you might find some useful information.  

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