Soil Compaction

[RytheHVACer]

Good afternoon,

I'm a mechanical engineer doing a project which consists in part of sawcutting and excavating some soil below the slab. My structural engineer just got back to me by email saying - "Compact to 95% SPDD". Just wondering what SPDD stood for? Thanks.

 

[RWF7437]

Probably, he meant Standard Proctor Dry Density. This is a commonly used test in the highway and general Civil engineering fields. These days, field testing is usually done by a company specializing in such work.

Basically what he is asking for is a very dense subgrade soil; about 95% as dense as it would be possible to achieve under ideal conditions.

Acronymically yours,

RWF

 

[RJP78]

Standard Proctor - ASTM D698

 

[BigH]

Actually should be a "max" in there - Standard Proctor Maximum Dry Density.

 

[RytheHVACer]

Thanks for the info!