5-160 * The Contractor and QAI may, by mutual agreement, modify any part of the schedule; however, failure to provide the documentation when required b y the Fabrication Engineer will result in the product being deemed unacceptable. The Contractor may perform testing in addition to the minimum required. The resul ts of all testing shall be made available to the Department.
534.08 Quality Assurance Quality Assurance (QA) is the preroga tive of the Department.
Refer to Section 712.061.
534.09 Nonconforming Work Refer to Section 712.061.
534.10 Forms Construct forms in accordance with the Working Dr awings. The forms
shall be well constructed, carefully aligned and sufficiently t ight to prevent leakage of mortar. Reject forms that do not m aintain the dimensions shown on the Working Drawings. Seal wooden forms to prevent absorption of water. Apply and cu re the sealer in accordance with the manufacturer's product data sheet. Remove all paint, adherent material, foreign matter and debris prior to placing concrete. Apply a non-staining bond-breaki ng compound to the forms in acc ordance with the manufacturer's product data sheet . Solvent clean reinforcing s teel and welded steel wire fabric contaminated with the bond-breaking compound.
534.11 Reinforcing Steel and Welded S teel Wire Fabric Refer to Sections 712.061 and
503 for fabrication, packaging, handling, storing, placing, spl icing and repair of reinforcing steel, welded steel wire fabric and mechanical/welded reinforci ng steel splices. The concrete cover over the outside circumferential reinforceme nt shall be 2 inches, minimum, and the concrete cover over the inside reinforcement s hall be 1-½ inches, minimum. The clear distance of the end of circumferential wire s shall not be less than 1 inch or more than 2 inches from the end of the units. Use suffi cient supports and spacers to maintain the minimum concrete cover. The supports and spacers shall be made of a dielectric material or other material approved by the Fabricati on Engineer. Welded steel wire fabric shall meet the spacing requirements an d contain sufficient longitudinal wires extending through the unit to maintain the s hape and position of the reinforcement. Longitudinal distribution reinforcement may be welded steel wire fabric or deformed steel bars which meet the spacing requirements. The en ds of the longitudinal distribution reinforcement shall not be more than 3 inches from the ends of the units. Do not use more than three layers of reinforcing to form a sing le mat. If reinforcing steel is cut to install lifting devices, install additional reinforci ng adjacent to the cut steel, as shown on the Working Drawings. 5-161 Tension splices in the reinforcement will not be permitted. Fo r splices other than tension splices, the overlap shall be a minimum of 12 inches fo r welded steel wire fabric and as specified in Standard Specification Section 503 for deformed steel bars. The center-to- center wire spacing in wire fabric sheets shall not be less tha n 2 inches, or more than 4 inches, for the circumferential wires, and shall not be more th an eight inches for the longitudinal wires. The center-to-center spacing of the longit udinal distribution steel for either line of reinforcing in the top slab shall not be more th an 15 inches.
534.12 Inserts Refer to Section 712.061.
534.13 Concrete Placement Do not batch or place concrete until all the form(s) for any
continuous placement have been inspected and accepted by the Qu ality Control Inspector (QCI), and the QAI concurs. Test concrete in accordance with the Standards included in Sect ion 712.061. Test the first two loads of concrete for temperature, air entra inment and slump flow for Self-Consolidating Concrete (SCC). If the first load is unacce ptable, test the second load as the first. Continue this process until two consecutive loads a re acceptable. After two consecutive loads are acceptable, the frequency of testing shal l be at the discretion of the QAI. If there is a change in the dosage rate of any admixture or a c hange of more than 5 F in mix temperature, then test the concrete for temperature, air en trainment and slump flow for SCC. Test every load of 1 cubic yard, or less, from a stationary mix er or 2 cubic yards, or less, from a transit mixer for temperature, air entrainment and slump flow for SCC, prior to placing the concrete in the forms. Perform all testing in the presence of the QAI. The QAI will d esignate the loads to be tested. Make cylinders used to determine stripping strength du ring the last 1/3 of the placement. Place the concrete as nearly as possible to its final location. Control the depth of each lift in order to minimize entrapped air voids. The maximum dep th of an unconsolidated lift shall be 18 inches. Vibrate the concrete with internal or inte rnal and external vibrators. Do not use external vibrators, only. Insert internal vibrators ve rtically and penetrate the lower layer of concrete by at least 4 inches. Insert the vibrators i n the concrete to assure that the radii of action of the vibrator s overlap. Hold the vibrators i n position from 5 to 15 seconds; vibration time shall be reduced by 50 percent when placing SCC. Do not use vibrators to move concrete horizontally. Each lift of concrete shall have s ufficient plasticity to be consolidated with subsequent lifts. Do not re-temper the concrete with water after discharging has begun. The Contractor may add High Range, Water Reducing, admixture to the concrete a fter batching if that