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23315 Dike Rues <br /> GuuC Amngton.WA 98223 <br /> 360.435.5791 <br /> CPC Materials,Inc. <br /> Concrete Mix Evaluation Report <br /> ACI 318 Required Average Strength <br /> Mix ID 0240P Number Of Tests 12 <br /> Mix Name 4000 PSI W/WRA 7/8" Average Strength 6108 psi <br /> Design Strength(f'c) 4000 psi @ 28 Days St Dev 1092 psi <br /> Required Strength(f'cr) 5200 psi @ 28 Days St Dev(Modified) 1092 psi <br /> Comp Acceptance <br /> Strength Strength <br /> (7-Day) (28-Day) <br /> Test Date Plant/Mix Lab Slump (psi) (psi) <br /> 12/20/2022 603R/0240P 5 4760 5360 <br /> 03/15/2023 603R/0240P 5.5 4170 5780 <br /> 03/15/2023 603R/0240P 5 3350 5180 <br /> 03/17/2023 603R/0240P 4 6690 9300 <br /> 03/22/2023 603R/0240P 6 5140 6280 <br /> 03/22/2023 603R/0240P 6.75 5390 6620 <br /> 04/04/2023 603R/0240P 6.5 4680 5650 <br /> 04/04/2023 603R/0240P 6.5 4900 5650 <br /> 04/04/2023 603R/0240P 6.5 4520 5460 <br /> 04/21/2023 603R/0240P 6.5 6010 6260 <br /> 05/25/2023 603R/0240P 5 4750 5620 <br /> 05/30/2023 603R/0240P 5.5 5240 6130 <br /> Average 5.73 4967 6108 <br /> Minimum 4.00 3350 5180 <br /> Maximum 6.75 6690 9300 <br /> Standard Deviation 0.862 1092 <br />