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i <br /> b. Air Content: ASTM C 173, volumehtic method for lightweight or normal � <br /> weight concrete; ASTM C 231, pressure method for normai weight <br /> concrete;one for each day's pow of each type of air-entrained cancrete. <br /> c. Concrete Temperature: ASTM C 10d4; one test hourly when air � <br /> temperature is 40 deg� (4 deg C) and below, when 80 deg F (27 deg C) <br /> and ai�ove,and one test for each set of compressive-strength specimens. <br /> d. Compression Test Specimen: ASTM C 31; one set of four standard <br /> cyiinders for each compressive-stren�h test, unless otherwise direc#ed, � <br /> Mold and store cylinders for laboratory-cumd test specimens except when <br /> field-cured test specimens are required. <br /> e. Compressive-Streng�th Tests: ASTM C 39; one set for each day's pour � <br /> exceeding 5 cu, yd. plus additional sets for each 50 cu. yd. more than the <br /> f�rst 2S cu.yd.of each concrete class placed in any one day;one specimen <br /> tested at '7 days, two specimens tested at 28 days, and one specimen � <br /> retained in reserve for Iater testing if required. <br /> f. When tofial quantity of a given class of concrete is Iess than SQ cu, yd., <br /> Architect may waive strength testing if adequate evidence of satisfactory <br /> slrength is provided. , <br /> C. Test results will be reported in writing to Arclutect, ready-mix producer,. and Contraotor <br /> within 24 hours after tests. Reports of compressive streng#h tests shall contain the Project <br /> identifcation name and number, date of concrete pIacement, name of concrete testing � <br /> service,concrete type and class,location of concrete batch in structure, design compressive <br /> strength at 28 days,concrete mix proportions and materials,compressive breaking strength, <br /> and type of break for both 7-day tests and 28-day tests. ' <br /> END OF SECTION 03300 <br /> � <br /> � <br /> � <br /> r <br /> � <br /> � <br /> � <br /> � <br /> � <br /> CONCRETE Page 8 of 8 ' <br />