FHWA Resource Center
November 4, 2004
PCEF – Materials and QA/QC subcommittee meeting
TO: Lou Triandafilou, P.E.
Chairman – PCEF committee
FHWA Resource Center
FROM: Robert Horwhat, P.E., Subcommittee Co-chairman
Paul Finnerty, SubcommitteeCo-Chairman
A subcommittee meeting was held on Friday, October 15, 2004 in Hagerstown, Maryland. The following subcommittee members were in attendance:
Paul Finnerty MDSHA
Bob Horwhat PENNDOT
Serge Ter-Arakelov PENNDOT
Paul Ingram PENNDOT
Larry Lundy VDOT
Sammy Searls WVDOT
Kwabena Ofori-Awuah District of Columbia
Joe Policelli FHWA
The following is a summary of the discussion from the meeting:
· Roll call was made to start the meeting
· Bob Horwhat asked for a motion to approve the minutes from the last meeting. Paul Finnerty so moved; Joe Policelli seconded the motion.
· Old Business items were reviewed
o Open action items were discussed:
QC plans and testing frequencies were solicited from member states
· PCI criteria – distributed earlier
· Received from District of Columbia
· Received from NYDOT
· Still need from WVDOT and NJDOT
o Serge T. will develop a matrix to show requirements.
Paul Finnerty will attempt to contact Dr. Celik to determine whether he is available to make an updated presentation on his research and specification developments.
Dick Hanlon provided comments on his review of the PCI SCC guide specification to Bob Horwhat. Many of Dick’s comments were aligned with those from PENNDOT’s meeting with their Precast Association and would need resolution prior to use.
· New Business
o NY DOT – 00-01M – Procedure for obtaining precaster approval.
Document received from Andrew Pennoni and later, electronically from Don Streeter from NYDOT
Committee agreed that many of the elements in the document should be included in our document. Document better responds to actual QC issues than MNL 116 – which incorporates both specification and QC issues.
Document aimed at approving a precaster to qualify and produce on certification (no inspection). General consensus was that level of inspection should be the decision of the individual State. Major elements which the committee agreed to keep were:
· Training and certification requirements for QC personnel
· Equipment and calibration
· Sampling/testing/certification requirements for component materials
· Prepour/postpour inspections/documentation
· Cold weather production procedures
· Stripping/handling and storage of product
· Final inspection
· Certification of finished product
· QC forms and other documentation
o NYDOT’s Prestressed Concrete Construction Manual (PCCM) was also received and distributed. It was agreed that this document was similar to our QA/QC specifications guidelines document, rather than a QC requirements document.
o District of Columbia submitted tables illustrating their testing frequencies for concrete and materials. This will be incorporated in the matrix for review.
o AASHTO recently introduced a ‘Recommended Standard Practice’ document that addresses Quality Control requirements for standard manufactured materials. The standard includes standard precast concrete elements and will be reviewed to determine if there is relevant material which can be incorporated into the subcommittee’s QC guidelines document.
· Self Consolidating Concrete
o VDOT has continued to update their DRAFT SCC specification. Larry Lundy reviewed the document with the group. Additional qualification testing of the concrete mixture is being added as Dr. Celik continues with his research. It is anticipated that Dr. Celik’s work and the VDOT specification can be presented to the general committee sometime during a future meeting.
o Lou Triandafilou recently forwarded specifications developed by Illinois DOT for self consolidating concrete.
Illinois requires slump flow, VSI evaluation, J-ring and static segregation testing.
Specification addresses unique visual indicators such as layering, folds and ‘weak surfaces’
Requires submittal/approval of an ‘SCC’ quality control plan
· Illinois’ requirements will be considered by the subcommittee.
o NYDOT’s use of SCC was discussed. NYDOT had responded that they allow SCC for precast (non-prestressed) applications. SCC for precast requires the precaster to qualify the mixture through freeze thaw testing only. NYDOT views SCC concrete as high performance concrete for prestressed concrete applications. NYDOT has a rigorous qualification protocol for high performance concrete.
o FHWA/VDOT beam test. FHWA and VDOT partnered to produce and test an SCC concrete beam. The article featured in the ‘Transporter’ was circulated at the meeting for the subcommittee’s review. The results of the testing are intended to determine how accurately current analysis methods approximate SCC behavior. The testing is also intended to address strand bond in SCC concrete…an item of interest to the subcommittee
o A report received from Maine DOT was distributed at the meeting. Maine used SCC in prestressed beams on an experimental project in Late 2002 and into 2003. Freeze thaw, air void system, rapid chloride permeability and compressive strength testing were performed. Maine reported that the SCC produced an excellent surface finish and test results were on par with or better than a standard control mixture. The subcommittee will review the results of this project and Maine’s recommendations when developing the standard.
The committee is still trying to encourage participation by other member states and industry representatives. An overview of the status of this work will be given at the general committee meeting on October 28, 2004.
Assignment (information should be submitted/distributed electronically wherever possible.)
All sub-committee Members
Review handout information distributed during the meeting
· Prepare and distribute minutes.
· Distribute any additional information received to subcommittee members
· Contact Dr. Celik to determine his availability to present updated research and specification work to the full committee.Submit forms used/required by Maryland DOT to document QC processes
· Contact any States who have not provided their QC plan requirements/testing frequencies.
o Develop a matrix of results
· Develop a matrix of qualification testing used by any States who allow SCC.
Survey Mid-western and Western States to determine if they have specifications or procedures developed for using SCC (identify if used for precast and/or prestressed concrete)
· Submit limits on what prestressed beam producers are permitted to repair (ie. identify structural vs non-structural repairs.