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CRMCA Concrete Quality Pre-Construction Checklist <br /> J <br /> Test Specimen Storage and Transportation <br /> Standard Curing Method: (Concrete Acceptance) (Circle Yes or No) <br /> Immersed in water-controlled temperature environment(Preferred) yes no <br /> Storage box-controlled temperature environment yes no <br /> Exposed to the environment yes no <br /> Who's responsible for providing specimen storage water tank or box? <br /> Who's responsible for maintaining the temperature of the storage environment? <br /> Note 6:ASTM C31 states. "Immediately after molding and finishing, the specimens shall be stored for a period up to <br /> 48h in a temperature range from 60 and 80 F and in an environment preventing moisture loss from the specimens. For <br /> concrete mixtures with a specified strength of 6000 psi or greater, the initial curing temperature shall be between <br /> 68 and 78 F." ASTM C31 also states. "The storage temperature shall be controlled by use of heating and cooling <br /> devices. as necessary. Record the temperature using a maximum-minimum thermometer." <br /> Note 7:ASTM C31 states, "Upon completion of initial curing and within 30 min after removing the molds, cure <br /> specimens with free water maintained on their surfaces at all times at a temperature of 73.5 +/-3.5 F. ..." <br /> Transportation of Specimens to the Laboratory <br /> ASTM C31, Section 11.1 states, "Specimens shall not be transported until at least 8 h after final set. During <br /> transporting, protect the specimens with suitable cushioning material to prevent damage from jarring. During — <br /> cold weather, protect the specimens from freezing with suitable insulation material. Prevent moisture loss <br /> during transportation by wrapping the specimens in plastic, wet burlap, by surrounding them with wet sand, <br /> or tight fitting plastic caps on plastic molds. Transportation time shall not exceed 4 h." <br /> When will specimens, cast on days preceding non-work days, be transported to the laboratory? <br /> Please explain: <br /> Field Curing Method: (Form or Shoring Removal but not Acceptance) (Circle Yes or No) <br /> Storage under conditions consistent with concrete in the structure yes no <br /> Maturity yes no <br /> Acceptance Criteria for Hardened Concrete (ACI 301/318) <br /> In accordance with ACI 318-14, Section 26.12.1.1 (e) and ACI 301 Section 1.6.3.1 (a-c)the Owner's testing agency <br /> shall report results to the Architect/Engineer, Contract, Concrete Supplier, and if requested, the Owner. ACI 301 also <br /> requires that the testing agency issue a report immediately, to these parties when it appears that furnished material is <br /> not in compliance with the specifications. Test results from standard molded and cured strength specimens will be <br /> evaluated separately for each concrete mixture. Evaluation is valid only if tests have been conducted in accordance <br /> with specified procedures. Each Validation of tests not conducted in accordance with specified procedures will be the <br /> responsibility of the Owner's testing agency. <br /> CRMCA Document#TC-01 Page 3 Revised 7.23.15 <br />