Earthwork

120-8.1 Embankment Construction – LOTs What is the maximum length of a LOT?

• Mainline pavement lanes, turn lanes, ramps, parking lots, concrete box culverts and retaining wall systems• A LOT is defined as a single lift of finished

embankment not to exceed 500 feet.• Shoulder-Only areas, bike/shared use paths, and

sidewalk areas• A LOT is defined as 2000 feet or one Day’s

Production, whichever is greater.

Question from Industry – How is Independent Verification processed.

Section 120-10 Independent Verification◦ 120-10.1.5 - In addition to the Verification testing, the

Engineer may perform additional Independent Verification (IV) testing. The Engineer will evaluate and act upon the IV test results in the same manner as Verification test results.

QC Sample - 108 pcf VT Proctor - 112 pcf

IV Proctor – 116 pcf Resolution Proctor 116 pcf

What proctor should we use?

Should they resample the material?

Where is RAP prohibited?

◦Construction areas that are below the seasonal high groundwater table elevation. ◦The top 12 inches of embankment.◦MSE Wall backfill.

Minimize RAP content to avoid possible long term settlement

Specifications

◦Soil & RAP mixture120-8.4.2

Prohibited in Retaining Wall Systems

◦Alternate Layer Construction 120-8.4.3

◦Shoulder Base 283

◦Stabilizing Material 914

Test Strip Requirements for 12 inch thick compacted lifts. 125-8.1.6 – In the soil envelope - maximum allowed thickness of backfill is 6

inches.

Requirements for max. 12 inch thick compacted Earthwork

Section Embankment 120-8.2

Pipe Backfill125-8.1

A-3 and A-2-4 soils with up to 15% fines

No Test strip required

Test strip required

A-1, Plastic materials, and A-2-4 Materials with greater than 15% fines

Test strip required Test strip required

Bedding Zone 4” below the pipe

PIPE

Top Zone - Up to the base or final grade

CoverZone

1 foot above pipe

Lowest ZoneBottom ofTrench

So

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lop

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Lift

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How many passing density tests are required before the contract allows Reduced Frequency Density Testing for;

Pipe backfill Embankment

120-10.1.6 Reduced Frequency Testing is allowed after 12

passing tests with no Resolution tests in favor of Verification.

Required to use similar compaction effort on the untested LOT

Select test location randomly from one of the two LOTs under consideration.

Requires Engineer’s permission to place material over untested LOT

Not allowed in shoulder only areas, sidewalks bike/shared use paths. (LOT size)

Reduced Frequency Testing is allowed after 6 passing tests with no Resolution tests in favor of Verification.

Required to use similar compaction effort on the untested LOT

Select test location randomly from one of the two LOTs under consideration.

Requires Engineer’s permission to place material over untested LOT

Plastic and Metal pipe backfill requires 95% of Standard Proctor for density.

Concrete pipe backfill requires 100% of Standard Proctor.

Structure backfill requires 100% of Standard proctor regardless of the type of pipe joining the structures.

Metal pipe requires 95% maximum density

Structure requires 100% maximum density

The pipe and structure require separate density tests because of different density requirements.

This will be clarified in the July 2013 specifications

Meet the requirements of Section 914- 160-2.2 (440/440A)

Local material may be clay from on-site, material from another construction project, or possibly byproducts from a process. The Specifications require testing of the material before it is

brought to the roadway and spread.

Sampling Section 914 requires a minimum of 3 organic content test results

and one LL/PI test result per source. The Engineer should partner with the contractor to investigate

the source or stockpile and evaluate each material. (best practice) Use one sample card for each source or stratum of material Provide a minimum of 3 - ½ bags of material for each source

“Material ID” - Enter 440 for projects let prior to March 1, 2011 and 440A if the project is let after March 1, 2011 (This will show in the project job guide schedule)

“Remarks” - Enter “Source testing “ “Sample Number – Enter “C001”, “C002”, “C003”, etc and either “Q” or “V”

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“Material ID” - Enter 440 for projects let prior to March 1, 2011 and 440B if the project is let after March 1, 2011 (This will show in the project job guide schedule)

“Sample Number” – Enter “C001”, “C002”, “C003”, etc and either “Q” or “V” “Plant or Pit No.” Enter “ROADWAY“ “QUANT REP” Enter “LOTS 1 thru 8” “Remarks” Enter “LL/PI and ORGANIC TEST”

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◦ Source Investigation (440/440A)

Evaluate the stockpile as a local material - 160-2.2 If failing organic content is due to the asphalt content of RAP or

RAP Blended material the department may modify acceptance (after careful evaluation)

Modified Acceptance for RAP or RAP Blend (440/440B)http://www.dot.state.fl.us/statematerialsoffice/administration/resources/

library/materialsbulletins/topics/2011/mb02-11.pdf Sample for LL/PI before mixing Sample and test for Asphalt Content (FM 5-563) (NCAT) after Mixing

The upper limit for FM 5-563 in the mixed Subgrade is 4.7% Failure may indicate too much Asphalt or the presence of a

material with a high organic content

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Appendix

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Name Office Telephone email

Timmy Meeks District 1 & 7 863-519-4200 [email protected]

Larry Keen District 2 386-758-3758 [email protected]

Tonya Myers District 3 850-638-0250 [email protected]

Ernst Registre District 4 & 6 954-677-7100 [email protected]

Joe Owens District 5 386-740-3400 [email protected]

Ed Cueto Florida Turnpike 954-934-1730 [email protected]

Daniel Pitocchi State Materials Office

352-955-2945 [email protected]

A4

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Name Office Telephone email

Barbara Beacham

District 1 & 7 863-519-4200 [email protected]

Vacant Position

District 2 386-758-3758 T.B.D.

Chad Miller District 3 850-638-0250 [email protected]

Ron Arcalas District 4 & 6 954-677-7100 [email protected]

Jody Clifton District 5 Materials


Todd Kelly Florida Turnpike


Ben Watson State Materials Office


A5

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