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2.) Perform compressive strength tests (ASTM C39). One set of four cylinders for each day's pour <br /> between one and 25 cubic yards. If a day's pour exceeds 25 cubic yards, one set of four cylinders <br /> for each additional 50 cubic yards, or fraction thereof. One specimen tested at seven days, two at <br /> 28 days,and one specimen retained in reserve for later testing if required. <br /> 3.) Slump (ASTM C143): one test at point of discharge for each set of compression test specimens; <br /> additional tests when concrete consistency appears to have changed. <br /> 4.) Air entrainment(ASTM C231): test the first batch of air entrained concrete and one additional test <br /> for each set of compression test specimens. <br /> 5.) Test concrete temperature hourly when air temperature is 40°F and below and when 80°F and <br /> above;and each time is set of compression test specimens is made. <br /> 1 b. Perform concrete mix verification. Qualifications: Technical I. Verify the following: <br /> 1.) Mixer truck trip ticket conforms to approved mix design. <br /> 2.) Total water added to mix on site does not exceed that allowed by concrete mix design. <br /> 3.) Concrete quality is indicative of adequate mixing time,consistency,and relevant time limits. <br /> C. Inspect preparation and placement of all concrete, excluding slabs on grade, strip footings without <br /> transverse reinforcement,and topping slabs. Qualifications: Structural I. Verify the following: <br /> r1.) Acceptable general condition of concrete base prior to placement. <br /> 2.) Concrete conveyance and depositing avoids segregation and contamination. <br /> 3.) Concrete is properly consolidated. <br /> 4.) Reinforcement remains at proper location. <br /> d. Observe protection and curing methods for all concrete, excluding slabs on grade, strip footings without <br /> transverse reinforcement,and topping slabs. Qualifications: Structural I. Verify the following: <br /> 1.) Specified curing procedures are followed. <br /> 2.) Specified hot and cold weather procedures are followed. <br /> B. Conventional Testing and Inspection Requirements <br /> 1. The Owner will employ a testing agent to perform density test of lightweight concrete per ASTM C567. One <br /> test,per-hghtweight pour <br /> C. Contractor Requirements: <br /> 1. Provide services of an independent laboratory to perform the following: <br /> a. Make and test additional cylinders to determine time for form removal. <br /> b. Make and test additional cylinders to determine termination of curing procedures. <br /> C. Make and test additional cylinders to determine termination of cold weather practices. <br /> 03300-11 No.99132-CP2 <br />