704.1(c) 704.1(d) Entrained air content can be determined by the unit weight method according to ASTM C 138. Once established, a correlation between air content as tested according to ASTM C173 and the unit weight method can be made.
start of the project and at least annually thereafter. Include in the QC Plan testing frequencies and action points to initiate corrective measures. Do not start work until the Department has reviewed the QC Plan. Furnish a copy of the QC Plan to be maintained in t he Department's project field office.
1.a Field Operation QC Plan. Prepare a field operation QC Plan for the Representative’s review, on Form CS -704, to evaluate concrete field operation. Submit the field operation QC Plan at the Pre- construction conference or at least 3 weeks before the first concrete pour. Describe the construction equipment, personnel, and methods necessary to construct and test concrete courses for all structural elements. Include testing frequencies and action points to initiate corrective measures. Do not establish action points at either the upper or lower specification limits.
and trained to develop the concrete design, to control the quality and gradation of aggregates used, to perform required concrete tests, and to control the operations and concrete deliveries so the completed mixture conforms to the specifications at the point of placement. The Department's concrete plant Inspector will not allow concrete considered unacceptable to be shipped to the project. The Inspector will not assume, by act or by word, any responsibility for batch control adjustments; calculations; or for setting of dials, gauges, scales, or meters. Failure of the Inspector to reject unacceptable concrete will not relieve the Contractor's obligation to provide concrete conforming to the specifications.
2.a Concrete Field Testing Technician. Provide, and assign to the work during placement of material , a PennDOT certified field testing technician, meeting the requirements according to Publication 536, to perform the required acceptance testing. The technician must carry a valid P ennDOT certification card during placement of material.
2.b. Concrete Finisher Certification. Provide ACI certified Flatwork Finishers, ACI certified Advanced Flatwork Finishers, or National Ready -Mix Concrete Association (NRMCA) certified Exterior Flatwork Finishers to control finishing of ea