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  1. slabongrade

    Residential slab on grade compaction testing

    Above some certain depth of fill, is it recommended to use a modified proctor instead of standard proctor? What depth would that be? This is for a house without drilled piers...
  2. slabongrade

    swell test

    Geotech report says 8.5" to 9.5" potential swell from a PI of 32. If the test involves compacting the sample beyond it's in situ density, then soaking it to measure swell - it would seem an erroneous value of swell (9.0% in this case). TXDOT uses an excel spreadsheet where the initial moisture...
  3. slabongrade

    dynamic cone penetrometer vs. texas cone penetrometer

    looking for correlation between these 2 tests; maybe a chart. Maybe the 15lb 20" drop DCP 1 3/4" = TCP 6"? I have the TXDOT geotech manual with charts for TCP N values giving drilled pier skin friction and end bearing values. Want to be able to use DCP values to get skin friction and end bearing...

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