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  1. Standard proctor and modified proctor | Eng-Tips

    Oct 8, 2015 · Modified Proctor (also called the "hernia" test) Engineeerd fill that will be used to support structures (under mat or spread foundations) Roadway subbase and base course I've had arguments …

  2. Standard or Modified Proctor Density? | Eng-Tips

    Feb 3, 2016 · Here's how I understand it: Both the standard proctor test and modified proctor are means of checking the compaction. I believe that before WWII there was only the proctor test. Around the …

  3. Converting Modified to Standard Proctor | Eng-Tips

    Jul 29, 2009 · Does anyone know of a conversion from modified proctor to standard proctor for both dry density and moisture? I usually assume 90 modified = 95 standard, but I need something I can hang …

  4. Modified Proctor compaction test | Eng-Tips

    Mar 12, 2016 · The laboratory test (Proctor) is then used as the basis of comparison to field density tests or in-place density tests done at the site to determine the percent compaction for specification …

  5. ASTM D698 vs D1557 | Eng-Tips

    Nov 24, 2002 · Did ASTM renumber these test specifications? I seem to remember different ASTM numbers for Standard and Modified Proctor tests.

  6. Questionable Modified Proctor test | Eng-Tips

    Mar 28, 2018 · I had a contractor using a backfill material that was tested using the modified proctor method yielding an optimum water content of 6.8% and max dry unit weight of 21.28kN/m3. They …

  7. Why 95% Compaction | Eng-Tips

    Jun 13, 2003 · The "95%" spec (usually specified when speaking in terms of the modified Proctor test) is somewhat arbitrary. It has been proven to work in most common situations where an engineered …

  8. CBR PROCTOR and others | Eng-Tips

    Mar 31, 2009 · Typically, the CBR test is performed at 95 percent relative compaction (we use Standard Proctor) as that typically corresponds to the specified level of compaction. If the field density testing …

  9. ASTM D-698 or D-1556 Proctor Method | Eng-Tips

    Does Proctor ASTM D-698 soil compaction call for 95% dry density or is that Proctor ASTM D-1156? Thank you.

  10. base course aggregate compaction | Eng-Tips

    May 8, 2009 · To add to Ron's comment, 103 to 104 percent "standard" proctor is achievable with the heavy vibrators - but would by about 98 to 99 percent "modified" proctor. emad84 - you need to …