2002 FDOT/FTBA Construction Conference QC 2000 Concrete Specifications Mike Bergin State Materials...

2002 FDOT/FTBA Construction Conference

QC 2000 Concrete Specifications QC 2000 Concrete Specifications

Mike Bergin Mike Bergin

State Materials OfficeState Materials Office

Email: Email: [email protected]@dot.state.fl.us

April 3, 2002 2002 Construction Conference 2

The Presentation will include

Highlights of Changes to Section 346Highlights of Changes to Section 346 A draft Resolution Procedure to assist A draft Resolution Procedure to assist

project personnelproject personnel


QC 2000

Is not NEW any moreIs not NEW any more But the specs have changed and the But the specs have changed and the

major changes will be addressed today.major changes will be addressed today. Jobs have been let under QC 2000 for Jobs have been let under QC 2000 for

several years, as of July 1, 2002 all several years, as of July 1, 2002 all FDOT projects will be let with QC 2000 FDOT projects will be let with QC 2000 Specifications approved by FHWA.Specifications approved by FHWA.


What’s New in Section 346

New references to Section 6.8, 6.9 and 105 New references to Section 6.8, 6.9 and 105 and reference to Chapter 9.2 in the and reference to Chapter 9.2 in the Materials Manual Materials Manual Section 6.8 -Quality Control ProgramSection 6.8 -Quality Control Program Section 6.9 -Laboratory QualificationsSection 6.9 -Laboratory Qualifications Section 105 -Quality Control Program Section 105 -Quality Control Program

RequirementsRequirements


What’s New in Section 346 (cont.)

Chapter 9.2 of the Materials Manual (MM) Chapter 9.2 of the Materials Manual (MM) –Information pertaining to concrete plants.–Information pertaining to concrete plants.


What’s New in Section 346 (cont.) Changes in almost every subsection.Changes in almost every subsection. This presentation will focus on the major This presentation will focus on the major

changes and how these changes affect changes and how these changes affect Construction and Materials.Construction and Materials. Especially the relation between Especially the relation between

Construction and Materials, and the Construction and Materials, and the Resolution Process Resolution Process


Standard Operating Procedures for the Quality Control of Concrete (SOP) is gone

The Level I of the SOP identified how The Level I of the SOP identified how producers batched concrete to meet the producers batched concrete to meet the requirements of the Specification.requirements of the Specification.

This information is now moved to Chapter 9.2 This information is now moved to Chapter 9.2 of the Materials Manual (MM), “Concrete of the Materials Manual (MM), “Concrete Production Facilities Guidelines” (CPFG) and Production Facilities Guidelines” (CPFG) and is located on the DOT website.is located on the DOT website.


Standard Operating Procedures,… is gone (cont.) MM Includes the requirements for batch plants MM Includes the requirements for batch plants

such as:such as:Plant specific QC plan Plant specific QC plan

• QC plan no longer job specificQC plan no longer job specificDesign mix requirements (change)Design mix requirements (change)

• Hot weather,old 346, mix temp is 94 F at Hot weather,old 346, mix temp is 94 F at the the end end of the mixing cycleof the mixing cycle

• Hot weather, new 346, mixes are held at Hot weather, new 346, mixes are held at 94 F 94 F duringduring entire mixing cycle entire mixing cycle


Standard Operating Procedures,… is gone (cont.)

The Level II from the SOP has been moved The Level II from the SOP has been moved directly into Section 346.directly into Section 346.

The Contractor describes how he will maintain The Contractor describes how he will maintain the quality of the concrete once it arrives at the the quality of the concrete once it arrives at the job site.job site.


Mass Concrete (3.1)

Requires a Specialty Engineer to formulate, Requires a Specialty Engineer to formulate, implement, administer and monitor the implement, administer and monitor the temperature control plan.temperature control plan.


Mass Concrete (3.1)

Department no longer Department no longer approvesapproves the plan but the plan but acceptsaccepts the Contractor’s proposed plan. the Contractor’s proposed plan. The responsibility is the Contractor’s to ensure The responsibility is the Contractor’s to ensure

that the plan meets the specification.that the plan meets the specification. Contractor’s QC Manager is responsible to Contractor’s QC Manager is responsible to

ensure the plan is followed during and after ensure the plan is followed during and after placement.placement.

No concrete is placed unless there is an No concrete is placed unless there is an accepted Mass Concrete planaccepted Mass Concrete plan


Sampling and Testing (5.1)

ASTM is now the standard for all concrete ASTM is now the standard for all concrete tests except for following two FM’stests except for following two FM’s early sampling of fresh concrete FM 5-early sampling of fresh concrete FM 5-

501 501 testing of chlorides in hardened concrete testing of chlorides in hardened concrete

FM 5-516FM 5-516


Control of Quality (6.1)

The Contractor maintains one quality control plan The Contractor maintains one quality control plan for his entire project.for his entire project. The guidelines are identified in Section 6.8.The guidelines are identified in Section 6.8. Section 5.6 of MM identifies QC information Section 5.6 of MM identifies QC information

for material producersfor material producers He is responsible to identify how the quality of He is responsible to identify how the quality of

material will be maintained.material will be maintained. Failure to meet specifications or contract Failure to meet specifications or contract

documents voids that portion of the QC plan.documents voids that portion of the QC plan.


Delivery Certification of Concrete (6.3) Delivery ticket requirements have been Delivery ticket requirements have been

moved to the “Concrete Production Facility moved to the “Concrete Production Facility Guidelines”, Chapter 9.2 of the MM.Guidelines”, Chapter 9.2 of the MM. Batch Plant Operator (BPO) signs stating Batch Plant Operator (BPO) signs stating

that the batch was produced in that the batch was produced in accordance with the approved design mixaccordance with the approved design mix


Delivery Certification of Concrete (6.3) The Contractor or his agent signs stating the The Contractor or his agent signs stating the

W/C ratio was not exceeded at the project W/C ratio was not exceeded at the project site and that the concrete meets the site and that the concrete meets the requirements of the specs.requirements of the specs.


Adding Water at the Placement Site (7.7)

Contractor must perform a slump test Contractor must perform a slump test beforebefore any water is added to the load. any water is added to the load.


Plastic Concrete Sampling and Testing (8) The Contractor is responsible for ensuring The Contractor is responsible for ensuring

that plastic properties, determination of the that plastic properties, determination of the w/c ratio and compressive strength of w/c ratio and compressive strength of cylinders are in compliance with the cylinders are in compliance with the Specifications.Specifications.


Plastic Concrete Sampling and Testing (8) Testing will be performed:Testing will be performed:

by CTQP qualified technicians.by CTQP qualified technicians. on each lot of concrete from a random on each lot of concrete from a random

load within that lot.load within that lot.


Plastic Concrete Sampling and Testing (8) A Lot is 50 ydA Lot is 50 yd3 3 or one days production or one days production

which ever is less which ever is less except for: Pav’t – one lane mile or one days Pav’t – one lane mile or one days

productionproduction I Special –150 ydI Special –150 yd3 3 or one days productionor one days production III Seal – Each placementIII Seal – Each placement


Plastic Concrete Sampling and Testing (8) The Department will randomly select 1 of The Department will randomly select 1 of

every 4 lots to compare QC with every 4 lots to compare QC with Verification tests.Verification tests. Use a Random number generator Use a Random number generator


Plastic Concrete Sampling and Testing (8) 3 consecutive lots or 5 lots in two days out 3 consecutive lots or 5 lots in two days out

of tolerance (in the same mix) – the of tolerance (in the same mix) – the Contractor will suspend production from Contractor will suspend production from this plant.this plant.

Department may perform independent Department may perform independent verification test any time.verification test any time.


Acceptance Sampling and Testing (9.1) Contractor will cast a set of 3 cylinders from each Contractor will cast a set of 3 cylinders from each

lot, from a random load within the lot lot, from a random load within the lot For each lot that the Department verifies with the For each lot that the Department verifies with the

Contractor, cast an additional “hold” cylinder.Contractor, cast an additional “hold” cylinder. The “hold” cylinder will be used for resolution The “hold” cylinder will be used for resolution

if the QC tests do not compare with the if the QC tests do not compare with the Verification tests.Verification tests.


Acceptance Sampling and Testing (9.1) The laboratory performing the compressive The laboratory performing the compressive

strength tests shall meet the requirements of strength tests shall meet the requirements of Section 6-9Section 6-9

The concrete is verified when the Contractors The concrete is verified when the Contractors quality control (QC) cylinders compare within 750 quality control (QC) cylinders compare within 750 psi with the Verification cylinders.psi with the Verification cylinders.

If QC does not compare within the 750 psi of If QC does not compare within the 750 psi of Verification then the Engineer will initiate the Verification then the Engineer will initiate the Resolution Procedure. Resolution Procedure.


Reduced Frequency for Acceptance Tests (9.2.1) If the Contractor can show consistency in If the Contractor can show consistency in

his QC tests, the sample frequency can be his QC tests, the sample frequency can be reduced and lot size will be increased to reduced and lot size will be increased to 100 yds100 yds3.3.


Acceptance of Hardened Concrete (9.4) When 1 of the 3 QC cylinders are lost, damaged or When 1 of the 3 QC cylinders are lost, damaged or

destroyed, destroyed, Average the remaining 2 cylinders and payment Average the remaining 2 cylinders and payment

for the lot is reduced by 10%for the lot is reduced by 10% When more than 1 of the QC cylinders is lost, When more than 1 of the QC cylinders is lost,

damaged, or destroyed damaged, or destroyed The contractor, at the discretion of the engineer, The contractor, at the discretion of the engineer,

will core the structure to determine if the will core the structure to determine if the minimum strength is met and no payment is minimum strength is met and no payment is made for that lot.made for that lot.


Resolution Procedure (9.5)

Is initiated when QC and Verification do Is initiated when QC and Verification do not compare.not compare.

The Department may initiate an The Department may initiate an Independent Assurance (IA) review of:Independent Assurance (IA) review of: plastic propertiesplastic properties calculation of w/c ratiocalculation of w/c ratio handling of cylindershandling of cylinders



curing procedures curing procedures initialinitialfinalfinal

compressive strength testingcompressive strength testing cores may be requiredcores may be required



““Hold” cylinders are tested within 7 days of Hold” cylinders are tested within 7 days of the 28-day strength tests.the 28-day strength tests.



Concrete is accepted based on the strength test Concrete is accepted based on the strength test results deemed by the Department to be the most results deemed by the Department to be the most accurateaccurate If Verification is the most accurate, then If Verification is the most accurate, then

Verification represents the 4 lots, -Contractor Verification represents the 4 lots, -Contractor pays for the Resolution testingpays for the Resolution testing

If QC is the most accurate, QC represents the 4 If QC is the most accurate, QC represents the 4 lots, -Department pays for the Resolution lots, -Department pays for the Resolution testing.testing.



When the Department cannot determine that When the Department cannot determine that either QC or Verification data is in error, either QC or Verification data is in error, the concrete representing the four lots will the concrete representing the four lots will be evaluated based on the results of the be evaluated based on the results of the resolution investigation.resolution investigation.


Rest of Section 346 relatively unchanged

Same requirements for Same requirements for Investigation of low strength concrete for Investigation of low strength concrete for

structural adequacy (10)structural adequacy (10) Pay adjustments for low strength Pay adjustments for low strength

concrete (11)concrete (11)


State Materials Office Develops a Resolution Procedure:

The intent is to inform both Construction The intent is to inform both Construction and Materials personnel of a consistent and Materials personnel of a consistent process in the event that Resolution is process in the event that Resolution is needed on their projects.needed on their projects.


These are the hold cylinders from the same load of concrete

XXXXXXXXXXX XXXXXXXXXX


XXXXXXXXXXXXXXXXXXXXXX


The DRAFT Resolution Procedure will be available on the SMO website.


In General the DRAFT Resolution Procedure identifies what is needed: At start of project, the Project Engineer At start of project, the Project Engineer

should designate one person to; should designate one person to; make data entrees and track cylinder make data entrees and track cylinder

testing.testing. make the comparisons between QC and make the comparisons between QC and

Verification test results.Verification test results.


After the Concrete is Placed:

When placement is completed, the plastic When placement is completed, the plastic property data should be entered into the 6 property data should be entered into the 6 screen of the CQR system within screen of the CQR system within one one working dayworking day of the concrete placement by of the concrete placement by the Project Engineer’s designee.the Project Engineer’s designee.


After the 28 day Strength Tests are completed

QC and Verification Labs should notify the QC and Verification Labs should notify the Project Engineer, or his designee of test Project Engineer, or his designee of test results on the first working day after testing results on the first working day after testing and;and; within 3 working days of obtaining the within 3 working days of obtaining the

data it should be entered into the 7 screen data it should be entered into the 7 screen of the CQR systemof the CQR system


CQR Codes

Verification SamplesVerification Samples V =Verification compares with QCV =Verification compares with QC N =Verification did not compare with N =Verification did not compare with

QCQC Project Engineer reviews the data and Project Engineer reviews the data and

verifies the comparison or non-comparisonverifies the comparison or non-comparison


When QC and Verification do not Compare Notify your District Concrete Engineer Notify your District Concrete Engineer

immediatelyimmediately He may initiate an IA review of QC and He may initiate an IA review of QC and

Verification proceduresVerification procedures He will notify the State Materials OfficeHe will notify the State Materials Office


Transport the “hold” cylinders to the designated Resolution laboratory: Each sample is accompanied with a new C-Each sample is accompanied with a new C-

22 card, with all information included.22 card, with all information included. The QC and Verification Laboratories will The QC and Verification Laboratories will

enter a new 6 screen into CQRenter a new 6 screen into CQR


The Resolution Laboratory will enter the 7 screen data and indicate the status of the resolution samples under new codes.


NEW CQR Codes for Resolution Samples RQ =Resolution confirms QC results or RQ =Resolution confirms QC results or

both QC and Verification resultsboth QC and Verification results RV =Resolution results confirm RV =Resolution results confirm

Verification resultsVerification results RR =Resolution results do not confirm QC RR =Resolution results do not confirm QC

or Verification results.or Verification results.


If you have any questions concerning these new CQR codes please contact:

Glen Mans in Certifications at the SMO Glen Mans in Certifications at the SMO (352) 337-3146(352) 337-3146 SC 642-3146SC 642-3146 [email protected]@dot.state.fl.us


Thank You for your time and attention - Any Questions?

2002 FDOT/FTBA Construction Conference QC 2000 Concrete Specifications Mike Bergin State Materials...

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