BigH a question on a previous post!
BigH a question on a previous post!
(OP)
BigH,
you have previously talked about a relationship between CBR and bearing values and have placed a chart on sliderules site. (nice site slide, cheers). would you mind telling us where this chart is from? I have a tendancy not to trust internet until I can verify it myself!
thanks.
you have previously talked about a relationship between CBR and bearing values and have placed a chart on sliderules site. (nice site slide, cheers). would you mind telling us where this chart is from? I have a tendancy not to trust internet until I can verify it myself!
thanks.





RE: BigH a question on a previous post!
1. CBR to AASHTO Class to Mod of Subgrade Reaction to CPT-SPT to CPT to SBPMT can be seen in Fang's Foundation Engineering Handbook, Fig 3.37.
2. CBR to AASHTO to R value to etc. - can be found in Baker's Highway Engineering Handbook (reference is in storage in Toronto so cannot tell you the Fig #.) - have also seen it elsewhere but can't remember off the top from where).
The one point that is not made, sadly, is as whether the CBR is a soaked value or an unsoaked value. This is one of the problems one notices all the time - nobody ever seems to give sufficient or concise details espeically wehre some ambiguity can exist.
RE: BigH a question on a previous post!
i wasn't implying you had sourced them off internet but if i was to make any reference to them I wanted a source for backup as I doubt our auditors would accept me saying someone off a message board passed them on!
Thanks again.
RE: BigH a question on a previous post!
dry density = wet density divide by (1 + moisture content as a fraction).
e.g., Moisture content is 10%. Wet density is 110 pcf, then the dry density is 110/1.1 = 100 pcf.
I have gauge #'s of Troxler 3440
DD=129.0
WD=123.6
Moisture at 10%
95% compaction
using your formula above it doesn't work--
123.6/1.1=112.36 for DD.
What I need is how to get a WD and weight of Moisture having DD and %moisture
Thanks