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DocuSign Envelope ID:07A4359F-6D47-4987-B1F1-BF667ACBB3BA <br /> D. Color Pigment: Add color pigment to concrete mixture in accordance with manufacturer's <br /> written instructions and to result in hardened concrete color consistent with approved mockup. <br /> 2.6 CONCRETE MIXTURES <br /> A. Class A: Normal-weight concrete used for footings, grade beams, and tie beams. <br /> 1. Exposure Class: ACI 318 FO. <br /> 2. Minimum Compressive Strength: 3000 psi at 28 days. <br /> 3. Maximum w/cm: 0.50 <br /> 4. Slump Limit: 4 inches,plus or minus 1 inch. <br /> B. Class B:Normal-weight concrete used for foundation walls. <br /> 1. Exposure Class: ACI 318 F2 WO CL <br /> 2. Minimum Compressive Strength: 4500 psi at 28 days. <br /> 3. Maximum w/cm: 0.45 <br /> 4. Slump Limit: 4 inches,plus or minus 1 inch <br /> 5. Air Content: <br /> a. Exposure Class F2: 6 percent,plus or minus 1.5 percent at point of delivery for <br /> concrete containing 3/4-inch nominal maximum aggregate size. <br /> 2.7 CONCRETE MIXING <br /> A. Ready-Mixed Concrete: Measure,batch,mix,and deliver concrete in accordance with <br /> ASTM C94/C94M,and furnish batch ticket information. <br /> B. Project-Site Mixing: Measure,batch, and mix concrete materials and concrete in accordance <br /> with ASTM C94/C94M.Mix concrete materials in appropriate drum-type batch machine mixer. <br /> 1. For mixer capacity of 1 cu.yd. or smaller, continue mixing at least 1-1/2 minutes,but not <br /> more than five minutes after ingredients are in mixer,before any part of batch is released. <br /> 2. For mixer capacity larger than 1 cu.yd.,increase mixing time by 15 seconds for each <br /> additional 1 cu.yd.. <br /> 3. Provide batch ticket for each batch discharged and used in the Work, indicating Project <br /> identification name and number, date, mixture type, mixture time, quantity, and amount <br /> of water added. Record approximate location of final deposit in structure. <br /> PART 3 -EXECUTION <br /> 3.1 EXAMINATION <br /> A. Verification of Conditions: <br /> Orange County Solid Waste Drainage Repairs DAA 2200365/TRC 017055.0000.0000 <br /> Drainage Repair Project November 2023 <br /> Orange County, NC 033000-9/19 <br />