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02750 Concrete Paving <br /> A. Construct exterior concrete walks and steps as shown on the Drawings and specified herein. <br /> B. Rough grading, work of Section 02300 EARTHWORK, will provide subgrade for aggregate subbase and base <br /> courses of pavement system. <br /> C. Concrete paving systems consist of minimum four inches (4") aggregate base course; reinforcing; and four <br /> inches (4") concrete. <br /> D. Paving Materials: <br /> 1. Aggregate Base: MnDOT 3138, Class 2 or 5 gradation; sand and gravel. <br /> 2. Concrete: ASTM C 150 Portland cement, aggregate, water and air entraining admixture as required to <br /> produce concrete having air content within range of 4.5 to 6.5 percent: <br /> a. Seed exposed aggregate finished concrete with pea sized gravel. <br /> 3. Reinforcing: <br /> a. Slabs-on-Grade: 6x6w1.4x1.41NWM <br /> b. Structural Slabs: Verify with the Architect. <br /> E. Properly compact subgrade and aggregate base. <br /> F. Finish: Exposed aggregate and sealer. <br /> G. Apply curing compound/sheeting following finishing. <br /> , <br /> 633 SPECIFICATIONS <br /> Page 20 <br />