If PC concrete is manufactured at an established PC concrete a batch and prequalification of the materials, mix proportions, mixing equipment, and procedures under section 90-1.01D(5)(b) are not required. 90-4.01D(2)(b) Quality Control Meeting After submitting the PC concrete QC plan, hold a meeting to discuss the requirements for PC concrete QC. The meeting attendees must include the Engineer, the PC concrete QC manager, and a representative from each plant performing PC concrete activities for the Contract. 90-4.01D(2)(c) Sampling, Testing, and Inspecting The QC laboratory testing personnel or the QC inspector must witness sampling. The QC laboratory testing personnel must perform testing. QC laboratory testing personnel must have the following certifications, as applicable: 1. ACI Strength Testing Technician 2. ACI Concrete Laboratory Testing Technician Level 1 3. ACI Aggregate Testing Technician Level 2 The QC Inspector must perform inspections before, during, and after casting is complete. QC field testing and inspection personnel must have an ACI Concrete Field Testing Technician, Grade I certification. For each mix design used for tier 1 and tier 2 PC concrete members, perform sampling and testing at the minimum frequencies shown in the following tables: Aggregate QC Tests Quality Minimum testing characteristic Test method frequency Aggregate ASTM C136 Once per 400 cu gradation yd of concrete cast Sand equivalent ASTM or 7 days, whichever is more Percent fines ASTM C117 frequent under 75 micronsa Moisture content of ASTM C566, or 1–2 per each fine aggregate electronically day of pour, actuated moisture depending on meterb conditions aPercent under 75 microns test replaces the cleanness test in section 90-1.02C with the requirements of 1.5 percent maximum for "Operating Range" and 2.0 percent maximum for "Contract Compliance." The 5th paragraph of section does not apply. bElectronically actuated moisture meter must be calibrated every 7 days per ASTM C566. Concrete QC Tests Quality Minimum testing characteristic Test method frequency Compressive ASTM Once per 100 cu strengtha C172/C172M, yd of concrete ASTM C31/C31M, cast, or every day and ASTM of casting, C39/C39M whichever is more Slump ASTM frequent C143/C143M Temperature ASTM C1064/C1064M
If PC concrete is manufactured at an established PC concrete a batch and prequalification of the materials, mix proportions, mixing equipment, and procedures under section 90-1.01D(5)(b) are not required. 90-4.01D(2)(b) Quality Control Meeting After submitting the PC concrete QC plan, hold a meeting to discuss the requirements for PC concrete QC. The meeting attendees must include the Engineer, the PC concrete QC manager, and a representative from each plant performing PC concrete activities for the Contract. 90-4.01D(2)(c) Sampling, Testing, and Inspecting The QC laboratory testing personnel or the QC inspector must witness sampling. The QC laboratory testing personnel must perform testing. QC laboratory testing personnel must have the following certifications, as applicable: 1. ACI Strength Testing Technician 2. ACI Concrete Laboratory Testing Technician Level 1 3. ACI Aggregate Testing Technician Level 2 The QC Inspector must perform inspections before, during, and after casting is complete. QC field testing and inspection personnel must have an ACI Concrete Field Testing Technician, Grade I certification. For each mix design used for tier 1 and tier 2 PC concrete members, perform sampling and testing at the minimum frequencies shown in the following tables: Aggregate QC Tests Quality characteristic Test method Minimum testing frequency Aggregate gradation ASTM C136 Once per 400 cu yd of concrete cast or 7 days, whichever is more frequent Sand equivalent ASTM Percent fines under 75 micronsa ASTM C117 Moisture content of fine aggregate ASTM C566, or electronically actuated moisture meterb 1–2 per each day of pour, depending on conditions aPercent under 75 microns test replaces the cleanness test in section 90-1.02C with the requirements of 1.5 percent maximum for "Operating Range" and 2.0 percent maximum for "Contract Compliance." The 5th paragraph of section does not apply. bElectronically actuated moisture meter must be calibrated every 7 days per ASTM C566. Concrete QC Tests Quality characteristic Test method Minimum testing frequency Compressive strengtha ASTM C172/C172M, ASTM C31/C31M, and ASTM C39/C39M Once per 100 cu yd of concrete cast, or every day of casting, whichever is more frequent Slump ASTM C143/C143M Temperature ASTM C1064/C1064M
Section_90.docx