oa Civil Engineering = Siviele Ingenieurswese - Possible developments in pavement foundation design

Volume 5, Issue 12
  • ISSN : 1021-2000



Mr Kleyn must have carried out considerable testing with the C.B.R. methods to obtain all the data which he had reported so simply. Referring to Fig. 1 were the isolines of C.B.R. obtained by plotting the C.B.R.s of soaked samples at their moulding (or pre-soaked) moisture contents? If this was the case, by obtaining C.B.R. density curves of soaked samples all moulded slightly dry of optimum, the Author was setting out to test materials compacted at their best or strongest condition. This was a laboratory condition not obtained in the field where the soil was initially compacted, say, at the optimum moisture content for the plant used, and finally by traffic over a range of moisture conditions.

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