3003 W CASINO RD BLDG 40-27 2022-03-17

40-27 BUILDING CAST -IN -PLACE CONCRETE I BRPH ARCHITECTS -ENGINEERS, INC. a. When frequency of testing provides fewer than five compressive -strength tests for each concrete mixture, testing shall be conducted from at least five randomly selected batches or from each batch if fewer than five are used. 2. Slump: ASTM C 143/C 143M; one test at point of placement for each composite sample, but not less than one test for each day's pour of each concrete mixture. Perform additional tests when concrete consistency appears to change. 3. Air Content: ASTM C 231/C 231M, pressure method, for normal -weight concrete;one test for each composite sample, but not less than one test for each day's pour of each concrete mixture. 4. Concrete Temperature: ASTM C 1064/C 1064M; one test hourly when air temperature is 40 deg F and below or 80 deg F and above, and one test for each composite sample. 5. Compression Test Specimens: ASTM C 31/C 31 M. a. Cast and laboratory cure two sets of two standard cylinder specimens for each composite sample. 6. Compressive -Strength Tests: ASTM C 39/C 39M; test one set of two laboratory - cured specimens at 7 days and one set of two specimens at 28 days. A compressive -strength test shall be the average compressive strength from a set of two specimens obtained from same composite sample and tested at age indicated. 7. Strength of each concrete mixture will be satisfactory if every average of any three consecutive compressive -strength tests equals or exceeds specified compressive strength and no compressive -strength test value falls below specified compressive strength by more than 500 psi. 8. Test results shall be reported in writing to Engineer, Owner, concrete manufacturer, and Contractor within 48 hours of testing. Reports of compressive and flexural -strength tests shall contain Project identification name and number, date of concrete placement, name of concrete testing and inspecting agency, location of concrete batch in Work, design compressive strength at 28 days, concrete mixture proportions and materials, compressive breaking strength, modulus of rupture, and type of break for both 7- and 28-day tests. 9. Nondestructive Testing: Impact hammer, sonoscope, or other nondestructive device may be permitted by Engineer but will not be used as sole basis for approval or rejection of concrete. 10. Additional Tests: Testing and inspecting agency shall make additional tests of concrete when test results indicate that slump, air entrainment, compressive strengths, modulus of rupture, or other requirements have not been met, as directed by Engineer. Testing and inspecting agency may conduct tests to determine adequacy of concrete by cored cylinders complying with ASTM C 42/C 42M or by other methods as directed by Engineer. 11. Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements 12. Correct deficiencies in the Work that test reports and inspections indicate do not comply with the Contract Documents. C06922.001.00 03 30 00 - 18 05-22-14