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DocuSign Envelope ID:070B6BC7-CDE2-4AO8-BE62-07FA6BFDO53B <br /> 11/20/2020 <br /> D. Begin curing after finishing concrete but not before free water has disappeared from concrete <br /> surface. <br /> E. Curing Methods: Cure concrete by moisture curing, moisture-retaining-cover curing, curing <br /> compound, or a combination of these as follows: <br /> 1. Moisture Curing: Keep surfaces continuously moist for not less than seven days with the <br /> following materials: <br /> a. Water. <br /> b. Continuous water-fog spray. <br /> C. Absorptive cover, water saturated and kept continuously wet. Cover concrete <br /> surfaces and edges with 12-inchlap over adjacent absorptive covers. <br /> 2. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover, <br /> placed in widest practicable width,with sides and ends lapped at least 12 inches,and sealed <br /> by waterproof tape or adhesive. Immediately repair any holes or tears occurring during <br /> installation or curing period,using cover material and waterproof tape. <br /> 3. Curing Compound: Apply uniformly in continuous operation by power spray or roller <br /> according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall <br /> within three hours after initial application. Maintain continuity of coating, and repair <br /> damage during curing period. <br /> 3.9 PAVING TOLERANCES <br /> A. Comply with tolerances in ACI 117and as follows: <br /> 1. Elevation: 3/4 inch. <br /> 2. Thickness: Plus 3/8 inch,minus 1/4 inch. <br /> 3. Surface: Gap below 10-feet-long;unleveled straightedge not to exceed 1/2 inch. <br /> 4. Joint Spacing: 3 inches. <br /> 5. Contraction Joint Depth: Plus 1/4 inch,no minus. <br /> 6. Joint Width: Plus 1/8 inch,no minus. <br /> 7. Alignment of Tie-Bar End Relative to Line Perpendicular to Paving Edge: 1/2 inch per 12 <br /> inches of tie bar. <br /> 8. Lateral Alignment and Spacing of Dowels: 1 inch. <br /> 9. Vertical Alignment of Dowels: 1/4 inch. <br /> 10. Alignment of Dowel-Bar End Relative to Line Perpendicular to Paving Edge: 1/4 inch per <br /> 12 inches of dowel. <br /> 3.10 FIELD QUALITY CONTROL <br /> A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections. <br /> B. Testing Services: Testing and inspecting of composite samples of fresh concrete obtained <br /> according to ASTM C 172/C 172M shall be performed according to the following requirements: <br /> 1. Testing Frequency: Obtain at least one composite sample for each 100 cu. yd. or fraction <br /> thereof of each concrete mixture placed each day. <br /> 32 13 13 CONCRETE PAVING Page 10 of 11 <br />