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.., . .., . ,., . TABLE 5 Description 1M ethod correction factors for each type of aggregate at the concrete production facility. * *For lOTs selected for verification testing use the same size cylinder molds as the Department uses for Verification tests. For the compressive strength testing of precas concrete the use of 4 inch x 8 inch [102 x 203 mm] test cylinders are allowed, provided hey meet the requirements of 450-4.1. ~ . M 346-6 Control of Quality. 346-6.1 General: Develop a Quality Control Plan (QCP) as specified in 6-8. Assume responsibility for meeting the requirements of the approved QCP and Contract Documents. Ensure the QCP includes the necessary requirements to control the quality of the concrete. QC activities are performed by the Contractor to ensure materials, methods, techniques, personnel, procedures and processes utilized during production meet the specified requirements. Accept the responsibility for performing QC inspections on all phases of work. Ensure all materials and workmanship incorporated into the project meet the requirements of the Contract Documents. When concrete plastic properties (slump, air content and temperature) could be significantly affected by handling between the point of delivery and the point of final placement, including the use of pumps, conveyor belts, troughs, chutes, barge transport or other means, provide in the QCP provisions to sample the plastic concrete for all testing at the point of final placement, as a minimum. Ensure the QCP includes any anticipated requirements for adjusting the concrete at the placement site. Include the testing procedures that will be implemented to control the quality of the concrete and ensure that concrete placed is within the target range. Also, include provisions for the addition of water to concrete delivered to the placement site at designated level areas, to ensure the allowable amount of water stated on the concrete delivery ticket or the maximum water/cementitious materials ratio on the approved design mix are not exceeded. Ensure the anticipated ranges of jobsite water additions are described and the proposed methods of measuring water for concrete adjustments are included. Failure to meet the requirements of this Specification or the QCP will automatically void that portion of the QCP. To obtain QCP re-approval, implement corrective actions as approved by the Engineer. The Engineer may allow the Contractor to continue any ongoing concrete placement but the Engineer will not accept concrete for any new placement until the QCP reapproval is given by the Engineer. 346-6.2 Concrete Design Mix: Provide concrete that has been produced in accordance with a Department approved design mix, in a uniform mass free from balls and lumps. Discharge the concrete in a manner satisfactory to the Engineer. Perform demonstration batches to ensure complete and thorough placements in complex elements, when requested by the Engineer. Do not place concretes of different compositions such that the plastic concretes may combine, except where the plans require concrete both with and without silica fume, metakaolin or calcium nitrite in a continuous placement. Produce these concretes using two separate design mixes. For example, designate the mix with calcium nitrite as the original mix and the mix without calcium nitrite as the redesigned mix. Ensure that both mixes contain the same cement, fly ash or slag, coarse and fine aggregates and ,., . ,.., . ., . .., . I II . ., . . ~ . ..., . ,.., . II . II . ...., - n 09/09 01000-98 03-4122.F -