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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />C. When strength of field -cured cylinders is less than 85 percent of companion laboratory -cured <br />cylinders, Contractor shall evaluate operations and provide corrective procedures for protecting and <br />curing in -place concrete. <br />D. Strength of each concrete mix will be satisfactory if every average of any three consecutive <br />compressive - strength tests equals or exceeds specified compressive strength and no compressive - <br />strength test value falls below specified compressive strength by more than 500 psi. <br />E. Test results shall be reported in writing to Architect, concrete manufacturer, and Contractor within <br />48 hours of testing. Reports of compressive - strength tests shall contain Project identification name <br />and number, date of concrete placement, name of concrete testing and inspecting agency, location of <br />concrete batch in Work, design compressive strength at 28 days, concrete mix proportions and <br />materials, compressive breaking strength, and type of break for both 7 -and 28 -day tests. <br />F. Nondestructive Testing: Impact hammer, sonoscope, or other nondestructive device may be <br />permitted by Architect but will not be used as sole basis for approval or rejection of concrete. <br />G. Additional Tests: Testing and inspecting agency shall make additional tests of concrete when test <br />results indicate that slump, air entrainment, compressive strengths, or other requirements have not <br />been met, as directed by Architect. Testing and inspecting agency may conduct tests to determine <br />adequacy of concrete by cored cylinders complying with ASTM C 42 or by other methods as <br />directed by Architect. <br />END OF SECTION <br />CAST -IN-PLACE CONCRETE 033000-17 <br />