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� <br /> , <br /> li htwei ht or normal w.ei ht � <br /> Air_Content: ASTM C 173, volumetric method for g g g <br /> concrete; ASTM C 231 pressure for normal weight concrete; one for each day's <br /> pour of each type of air-entrained concrete. ' <br /> Concrete Tem erature: Test hourly when air temperature is 40 degrees F (4 <br /> degrees C and below, and when 80 degrees F (27 degrees C) and above; and each � <br /> time a set of compression test specimens made. <br /> Compression Test Specimen: ASTM C 31; one set of 4 standard cylinders for each <br /> compressive strength test, unless otherwise directed. Mold and store cylinders for ' <br /> laboratory cured test specimens except when field-cure test specimens are <br /> required. <br /> Compressive Strent�th Tests: ASTM C 39; one set for each day's pour exceeding 5 ' <br /> cu. yds. plus additional sets for each SO cu. yds. over and above the first 2S cu. yds. <br /> of each concrete class placed in any one day; one specimen tested at 7 days, two <br /> specimens tested at 28 days, and one specimen cetained in reserve for la4er te�ting ' <br /> if required. <br /> When frequency of testing will provide less than S strength tests for a �iven class ' <br /> of concrete, conduct testing from at least 5 randomly selected batches or from <br /> each batch if fewer than S are used. <br /> Test �esults will be reported in writing to Architect, Structural Engineer or Contractor , <br /> within 24 hours after tests. Reports of compressive strength tests shall contain the <br /> project identification name and number, date of concrete placement, name of concrete <br /> testing service, concrete type and class, location of concrete batch in structure, design � <br /> compressive stren�th at 28 days, concrete mix proportions and materials; compressive <br /> breaking strength and type of break for both 7-day tests and 28-day tests. <br /> Nondestructive TestinA: Impact hammer, sonoscope, or other nondestructive device may � <br /> be permitted but shall not be used as the sole basis for acceptance oc rejection. <br /> Additional Tests: The testing service will make additional tests of in-place concrete � , <br /> when test results indicate specified concrete strengths and other characteristics have <br /> not been attained in the structure, as directed by Architect. Testing service may <br /> conduct tests to determine adequacy of concrete by .cored cylinders complyinq with ' <br /> ASTM C 42, or by other methods as directed. Contractor shall pay for such tests when <br /> unacceptable concrete is verified. <br /> END OF SECTION 03010 , <br /> , <br /> � <br /> CONCRETE WORK 03310 -12 ' <br /> , <br />