CPT Correlation with Soil Density

[GeoGrouting]

In order to estimate silty sand, clayey silt soil density, could anybody advises a correlation factor, please.

 

[ishvaaag]

You can find a relationship with relative density, see

NCHRP SYNTHESIS 368 freely downloadable,

http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_368.pdf

Correlations may also be found in

Handbook of Geotechnical Investigation and Design Tables
Burt Look
Taylor and Francis, 2007

Hope this helps

 

[BigH]

and how accurate are these if the specific gravities of the materials are significantly greater or lower than, say 2.65?

 

[ishvaaag]

Too big a question for me, BigH; just trying to help. Certainly operating just on standard correlations is not the best way to know a particular soil.