1. 2002 FDOT/FTBA Construction Conference
QC 2000 Concrete Specifications
Mike Bergin
State Materials Office

2. The Presentation will include
Highlights of Changes to Section 346
A draft Resolution Procedure to assist project personnel
April 3, 2002
2002 Construction Conference

3. 2002 Construction Conference
QC 2000
Is not NEW any more
But the specs have changed and the major changes will be addressed today.
Jobs have been let under QC 2000 for several years, as of July 1, 2002 all FDOT projects will be let with QC 2000 Specifications approved by FHWA.
The current 346 for QC 2000 is version 4
April 3, 2002
2002 Construction Conference

4. 2002 Construction Conference
What’s New in Section 346
New references to Section 6.8, 6.9 and 105 and reference to Chapter 9.2 in the Materials Manual
Section 6.8 -Quality Control Program
Section 6.9 -Laboratory Qualifications
Section 105 -Quality Control Program Requirements
April 3, 2002
2002 Construction Conference

5. What’s New in Section 346 (cont.)
Chapter 9.2 of the Materials Manual (MM) –Information pertaining to concrete plants.
April 3, 2002
2002 Construction Conference

6. What’s New in Section 346 (cont.)
Changes in almost every subsection.
This presentation will focus on the major changes and how these changes affect Construction and Materials.
Especially the relation between Construction and Materials, and the Resolution Process
April 3, 2002
2002 Construction Conference

7. 2002 Construction Conference
Standard Operating Procedures for the Quality Control of Concrete (SOP) is gone
The Level I of the SOP identified how producers batched concrete to meet the requirements of the Specification.
This information is now moved to Chapter 9.2 of the Materials Manual (MM), “Concrete Production Facilities Guidelines” (CPFG) and is located on the DOT website.
April 3, 2002
2002 Construction Conference

8. Standard Operating Procedures,… is gone (cont.)
MM Includes the requirements for batch plants such as:
Plant specific QC plan
QC plan no longer job specific
Design mix requirements (change)
Hot weather,old 346, mix temp is 94 F at the end of the mixing cycle
Hot weather, new 346, mixes are held at 94 F during entire mixing cycle
Plant specific- producer gives contractor the plant qc plan and producer is ready to place concrete?
April 3, 2002
2002 Construction Conference

9. Standard Operating Procedures,… is gone (cont.)
The Level II from the SOP has been moved directly into Section 346.
The Contractor describes how he will maintain the quality of the concrete once it arrives at the job site.
April 3, 2002
2002 Construction Conference

10. 2002 Construction Conference
Mass Concrete (3.1)
Requires a Specialty Engineer to formulate, implement, administer and monitor the temperature control plan.
April 3, 2002
2002 Construction Conference

11. 2002 Construction Conference
Mass Concrete (3.1)
Department no longer approves the plan but accepts the Contractor’s proposed plan.
The responsibility is the Contractor’s to ensure that the plan meets the specification.
Contractor’s QC Manager is responsible to ensure the plan is followed during and after placement.
No concrete is placed unless there is an accepted Mass Concrete plan
April 3, 2002
2002 Construction Conference

12. Sampling and Testing (5.1)
ASTM is now the standard for all concrete tests except for following two FM’s
early sampling of fresh concrete FM 5-501
testing of chlorides in hardened concrete FM 5-516
April 3, 2002
2002 Construction Conference

13. 2002 Construction Conference
Control of Quality (6.1)
The Contractor maintains one quality control plan for his entire project.
The guidelines are identified in Section 6.8.
Section 5.6 of MM identifies QC information for material producers
He is responsible to identify how the quality of material will be maintained.
Failure to meet specifications or contract documents voids that portion of the QC plan.
Where is section 10.5, specs? MM? Is not in 346
April 3, 2002
2002 Construction Conference

14. Delivery Certification of Concrete (6.3)
Delivery ticket requirements have been moved to the “Concrete Production Facility Guidelines”, Chapter 9.2 of the MM.
Batch Plant Operator (BPO) signs stating that the batch was produced in accordance with the approved design mix
April 3, 2002
2002 Construction Conference

15. Delivery Certification of Concrete (6.3)
The Contractor or his agent signs stating the W/C ratio was not exceeded at the project site and that the concrete meets the requirements of the specs.
April 3, 2002
2002 Construction Conference

16. Adding Water at the Placement Site (7.7)
Contractor must perform a slump test before any water is added to the load.
April 3, 2002
2002 Construction Conference

17. Plastic Concrete Sampling and Testing (8)
The Contractor is responsible for ensuring that plastic properties, determination of the w/c ratio and compressive strength of cylinders are in compliance with the Specifications.
April 3, 2002
2002 Construction Conference

18. Plastic Concrete Sampling and Testing (8)
Testing will be performed:
by CTQP qualified technicians.
on each lot of concrete from a random load within that lot.
April 3, 2002
2002 Construction Conference

19. Plastic Concrete Sampling and Testing (8)
A Lot is 50 yd3 or one days production which ever is less except for:
Pav’t – one lane mile or one days production
I Special –150 yd3 or one days production
III Seal – Each placement
April 3, 2002
2002 Construction Conference

20. Plastic Concrete Sampling and Testing (8)
The Department will randomly select 1 of every 4 lots to compare QC with Verification tests.
Use a Random number generator
April 3, 2002
2002 Construction Conference

21. Plastic Concrete Sampling and Testing (8)
3 consecutive lots or 5 lots in two days out of tolerance (in the same mix) – the Contractor will suspend production from this plant.
Department may perform independent verification test any time.
April 3, 2002
2002 Construction Conference

22. Acceptance Sampling and Testing (9.1)
Contractor will cast a set of 3 cylinders from each lot, from a random load within the lot
For each lot that the Department verifies with the Contractor, cast an additional “hold” cylinder.
The “hold” cylinder will be used for resolution if the QC tests do not compare with the Verification tests.
April 3, 2002
2002 Construction Conference

23. Acceptance Sampling and Testing (9.1)
The laboratory performing the compressive strength tests shall meet the requirements of Section 6-9
The concrete is verified when the Contractors quality control (QC) cylinders compare within 750 psi with the Verification cylinders.
If QC does not compare within the 750 psi of Verification then the Engineer will initiate the Resolution Procedure.
April 3, 2002
2002 Construction Conference

24. Reduced Frequency for Acceptance Tests (9.2.1)
If the Contractor can show consistency in his QC tests, the sample frequency can be reduced and lot size will be increased to 100 yds3.
Minimum of 15 consecutive strength tests, same mix, same plant, same sub. Data can come from another project using the same mix but last compressive test must have been performed within 60 days.
April 3, 2002
2002 Construction Conference

25. Acceptance of Hardened Concrete (9.4)
When 1 of the 3 QC cylinders are lost, damaged or destroyed,
Average the remaining 2 cylinders and payment for the lot is reduced by 10%
When more than 1 of the QC cylinders is lost, damaged, or destroyed
The contractor, at the discretion of the engineer, will core the structure to determine if the minimum strength is met and no payment is made for that lot.
April 3, 2002
2002 Construction Conference

26. Resolution Procedure (9.5)
Is initiated when QC and Verification do not compare.
The Department may initiate an Independent Assurance (IA) review of:
plastic properties
calculation of w/c ratio
handling of cylinders
April 3, 2002
2002 Construction Conference

27. Resolution Procedure (9.5)
curing procedures
initial
final
compressive strength testing
cores may be required
April 3, 2002
2002 Construction Conference

28. Resolution Procedure (9.5)
“Hold” cylinders are tested within 7 days of the 28-day strength tests.
April 3, 2002
2002 Construction Conference

29. Resolution Procedure (9.5)
Concrete is accepted based on the strength test results deemed by the Department to be the most accurate
If Verification is the most accurate, then Verification represents the 4 lots, -Contractor pays for the Resolution testing
If QC is the most accurate, QC represents the 4 lots, -Department pays for the Resolution testing.
April 3, 2002
2002 Construction Conference

30. Resolution Procedure (9.5)
When the Department cannot determine that either QC or Verification data is in error, the concrete representing the four lots will be evaluated based on the results of the resolution investigation.
April 3, 2002
2002 Construction Conference

31. Rest of Section 346 relatively unchanged
Same requirements for
Investigation of low strength concrete for structural adequacy (10)
Pay adjustments for low strength concrete (11)
April 3, 2002
2002 Construction Conference

32. State Materials Office Develops a Resolution Procedure:
The intent is to inform both Construction and Materials personnel of a consistent process in the event that Resolution is needed on their projects.
April 3, 2002
2002 Construction Conference
These Cylinders are from the same Lot, same load of concrete

33. 2002 Construction Conference
XXXXXXXXXXX XXXXXXXXXX
These are the hold cylinders from the same load of concrete
April 3, 2002
2002 Construction Conference

34. 2002 Construction Conference
XXXXXXXXXXXXXXXXXXXXXX
April 3, 2002
2002 Construction Conference

35. The DRAFT Resolution Procedure will be available on the SMO website.
April 3, 2002
2002 Construction Conference

36. In General the DRAFT Resolution Procedure identifies what is needed:
At start of project, the Project Engineer should designate one person to;
make data entrees and track cylinder testing.
make the comparisons between QC and Verification test results.
April 3, 2002
2002 Construction Conference

37. After the Concrete is Placed:
When placement is completed, the plastic property data should be entered into the 6 screen of the CQR system within one working day of the concrete placement by the Project Engineer’s designee.
Why does this need to be in the 6 screen within one day?
April 3, 2002
2002 Construction Conference

38. After the 28 day Strength Tests are completed
QC and Verification Labs should notify the Project Engineer, or his designee of test results on the first working day after testing and;
within 3 working days of obtaining the data it should be entered into the 7 screen of the CQR system
April 3, 2002
2002 Construction Conference

39. 2002 Construction Conference
CQR Codes
Verification Samples
V =Verification compares with QC
N =Verification did not compare with QC
Project Engineer reviews the data and verifies the comparison or non-comparison
April 3, 2002
2002 Construction Conference

40. When QC and Verification do not Compare
Notify your District Concrete Engineer immediately
He may initiate an IA review of QC and Verification procedures
He will notify the State Materials Office
April 3, 2002
2002 Construction Conference

41. 2002 Construction Conference
Transport the “hold” cylinders to the designated Resolution laboratory:
Each sample is accompanied with a new C-22 card, with all information included.
The QC and Verification Laboratories will enter a new 6 screen into CQR
April 3, 2002
2002 Construction Conference

42. 2002 Construction Conference
The Resolution Laboratory will enter the 7 screen data and indicate the status of the resolution samples under new codes.
April 3, 2002
2002 Construction Conference

43. NEW CQR Codes for Resolution Samples
RQ =Resolution confirms QC results or both QC and Verification results
RV =Resolution results confirm Verification results
RR =Resolution results do not confirm QC or Verification results.
April 3, 2002
2002 Construction Conference

44. 2002 Construction Conference
If you have any questions concerning these new CQR codes please contact:
Glen Mans in Certifications at the SMO
(352) SC
April 3, 2002
2002 Construction Conference

45. Thank You for your time and attention - Any Questions?
April 3, 2002
2002 Construction Conference