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ODOT Compaction Testing Peter Narsavage, P.E.

ODOT Compaction Testing - Pages count once per week. 5 Choose ... One-point Proctor test used for soil with ... ODOT Compaction Testing Maximum dry density is indicated in Examples

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  • ODOT Compaction Testing

    Peter Narsavage, P.E.

  • 2

    Compaction Testing

    Supplement 1015

    Compaction Testing of Unbound Materials

    ODOT Compaction Testing

  • 3

    Compaction Testing

    Nuclear gage used to determine

    in-place dry density.

    Maximum dry density determined from:

    One-point Proctor test

    or

    Test section

    ODOT Compaction Testing

    Percent Compaction =In-Place Dry Density

    Maximum Dry Density

  • 4

    Nuclear Gage Testing

    Always used to

    determine in-

    place dry density

    and in-place

    moisture content.

    Standard count

    once per week

  • 5

    Choose test location

    Choose a representative location.

    Have contractor provide a smooth surface

    ODOT Compaction Testing

  • 6

    Make sure it is level and smooth

    This looks good.

    ODOT Compaction Testing

  • 7

    Smooth with scraper plate

    Use sand to fill surface voids

    ODOT Compaction Testing

  • Take the measurement

    In-place dry density and in-place moisture content

  • 9

    Probe depth

    Embankment

    probe depth = 8"

    Subgrade

    probe depth = 12"

    Bases, granular material,

    test section

    use backscatter mode

    ODOT Compaction Testing

  • 10

    Maximum Dry Density

    One-point Proctor test used for soil with

    more than 35% passing No. 200 sieve and

    25% or less retained on the inch sieve.

    Test section used for other material.

    granular material, bases,

    select granular backfill

    ODOT Compaction Testing

  • 11

    One-point Proctor TestAASHTO T-272

    Family of Curves One Point Method

    Method C inch sieve and 4-inch

    diameter mold

    Refers to AASHTO T-99, Standard

    Proctor

    One-point Proctor sample prepared for

    every test.

    ODOT Compaction Testing

  • EVERY TEST

  • Sieve material through inch sieve.

    Save retained stone.

  • ODOT Typical Moisture-

    Density Curves

    Moist density from

    Proctor test

    Moisture content

    from nuclear gage

    reading

  • 15

    Aggregate Correction

    Aggregate

    correction

    required if percent

    of stone retained

    on inch sieve is

    10 to 25% of

    sample by weight.

    ODOT Compaction Testing

  • Aggregate Correction

    Corrected optimum

    moisture content is

    determined from table

    and corrected

    maximum dry density.

    116.5

  • Check moisture content from zero

    air-voids curve

    This moisture content

    must be greater than

    the moisture content

    from the nuclear

    gage.

  • 19

    Compaction Requirements

    For one-point Proctor test, the percent

    compaction must be at least

    ODOT Compaction Testing

    Maximum Dry

    Density

    Compaction

    Requirement

    90 to 104.9 lb/ft 102%

    105 to 119.9 lb/ft 100%

    120 lb/ft or more 98%

  • 20

    Test Section

    Used for granular material

    Less than 35% passing the 200 sieve, or

    More than 25% retained on inch sieve.

    Method A Method B Method C

    ODOT Compaction Testing

  • 21

    Test Section Method A

    Method A used for materials that have a definite

    moisture-density relationship (you can determine

    an optimum moisture content)

    Place material at optimum moisture (2%)

    ODOT Compaction Testing

  • Test Section Method A

    Make two passes

    Take a compaction test

    (mark location with paint)

    Make another pass

    Take another compaction test

    Repeat until no further increase or density drops

    Verify by making two more passes

    and one more compaction test.

  • 23

    Test Section - Examples

    ODOT Compaction Testing

    Maximum dry density is indicated in

    Examples 1 and 2

    Something didnt work in Example 3, try

    another test section

    Passes 2 3 4 5 6 7 8 9 10 11 12

    Density, lb

    /ft

    Example 1 134.0 137.2 139.5 140.9 142.3 142.5 142.5 142.4

    Example 2 133.8 134.8 133.5 142.1 146.8 147.2 147.9 148.2 148.3 147.2

    Example 3 120.1 128.7 129.3 130.0 132.6 130.1 145.2

  • 24

    Test Section Method BUsed when material does not have a

    definitive moisture-density relationship,

    typically fine sands, foundry sands, bottom

    ash, fly ash, etc.

    Place dry (0 to 3%)

    Run test section

    Repeat and increase

    water content by 2%

    ODOT Compaction Testing

  • 25

    Test Section Method C

    Rarely used.

    Used for open graded or highly variable

    material.

    Similar to Method A, but use the average

    of three in-place density measurements

    for each compaction test.

    ODOT Compaction Testing

  • 26

    Size of Test Section

    400 SY for embankment or aggregate bases

    40 SY for SGB in MSE walls

    10 SY for pipe backfill

    ODOT Compaction Testing

  • 27

    Compaction Requirements

    For test section, the percent

    compaction must be at least 98%

    ODOT Compaction Testing

  • 28

    Forms

    CA-EW-5 Nuclear Gage Compaction Form

    Used for one-point Proctor and test sections

    CA-EW-6 Nuclear Gage Compaction with

    Aggregate Correction

    ODOT Compaction Testing

  • 31

    Compaction of Rock

    Rock is material too large to be placed in an

    8-inch lift.

    Must be smaller than 3 feet in size

    Compacted with a set number of passes

    with a particular roller size.

    No compaction testing

  • 32

    Shale

    ODOT Compaction Testing

    Compaction

    testing could be

    any of the

    methods.

  • 33

    Bucket test for shalePlace 6-inch piece in bucket of water for 48 hours.

    (C&MS 703.16.D)

    ODOT Compaction Testing

    Before After

  • 34

    Bucket test for shale

    After 48 hours, break down with hand pressure.

    Percent retained on inch sieve:

    Less than 25% use one-point Proctor method

    Between 25 and 75% use test section method

    More than 75% perform roller test(six passes with a roller that weighs 500 pounds per inch of width)

    More than 40% breaks down use test section

    Less then 40% breaks down treat like rock

    (no compaction testing)

    ODOT Compaction Testing

  • 35

    Amount of compaction testing

    ODOT Compaction Testing

    203, 205 one test per 2,000 CY

    204, 206 one test per 3,000 SY

    304, 411 three tests per 5,000 SY (one per lift)

    503 one test every 5th lift

    603 one test every 5th lift or one test every 50 LF

    840 SGB one test per 300 LF for every lift

  • 36

    NICET CertificationRequired by SS 878 for contractor supplied

    compaction testing.

    NICET Level II, Construction Materials

    Testing subfield Soils

    First required in the summer of 2006

    Alternate qualifications acceptable until

    July 1, 2007ODOT Compaction Testing

  • www.dot.state.oh.us/Divisions/ConstructionMgt