Loading...
Grapevine Creek-CS 910812 COMMENTARY OF STATISTICAL EVALUATION OF CONCRETE DESIGN RESULlS m Mix No. 9377 Strength 6000 psi @ 56 Days Paragrap~ 4.6 of ACI 318-83 provides that as data becomes available during construction, the amount by which (f' ) must exceed the ~pectfled value oS cr c) may' be reduced, provided: (a) 30 or more test results are available and average of test results exceeds that required by Section 4.3.2.1, using a standard deviation calculated in accordance with Section 4.3.1.1, or (b) 15 to 29 test results are available and average of test results exceeds that required by Section 4.3.2.1, using a standard deviation calculated in accordance with Section 4.3.1.2. The required average compressive strength has been CalCulated using a standard deviation calculated in accordance with ACI 310-83 Section 4,3.1.1 or Section 4.3.1.2 and is the larger value of the~e calculations f, cr + 1.34(SD) C -- 6000 + 1.34(005t9) -- 6695 cr '~ 2.32(5D) - 500 C ~ 6000 · 2.33(00519) - 500 ~ 6709 SUMMARY OF STATISTICAL ANALYSIS 28 Day Te~t Data Number of Tests .......................... 30 Maximum Value ............................ 7?55 psi Minimum Value ............................ 5645 psi ~ange .................................... 2110 psi Average Strength ......................... 6519 psi Standard Deviation ....................... 519 psi Required Average Strength to ~atisfy minimum probability conditions of ACI 315-~3 Section ¢.3.2.1 ............... 610g psi DeSign excess beyond code requirements.. -lg0 p~t TEXAS INDUSTRIES. INC. CONCRETE DESIGN EVALUATION Date: 08/!2/91 ** Statistics Compiled From independent Lab3ratory ~e~t Specimens ** Page: Mix No, 9377 Strength 6000 p~i ~ 56 Days 28 Day Test Data Test Plant Temperature Placement Percent ....... 28 Day ....... Cum Moving NO. Date No. Amb Con S!um~ of Air PS! 1 PS! 2 PSI Ay§ Av9 Avg of 3 Range 1 07/06/88 15 80 90 5.0 4.$ 63~0 6250 6280 6280 6280 60 2 07/13/68 1~ 89 89 S.O N/A 6810 6840 6825 6553 6553 30 3 07/13/88 15 82 go 4.7 N/A 7050 7i40 7095 6733 6733 4 07/18/88 15 80 90 5.0 4.2 6940 6930 6935 6784 6952 19 5 07/18/88 15 85 91 4.7 3 8 5650 5640 5645 6856 6~58 6 07/22/88 15 69 86 5.0 4,1 6010 6060 6025 6469 620~ 50 7 07/22/88 1S B~ 90 4.7 N,'A 6150 6210 6i80 6428 5953 60 8 07/29/88 15 75 83 5.0 4.1 6630 651C 6570 6446 6262 !20 g 07/29/88 15 82 89 5.0 5.0 6000 6060 6030 6399 6260 63 10 08/04/88 15 85 89 4,5 N/A 6010 6290 6150 5375 6250 28U 11 08/11/88 15 80 92 S.O 5.0 6700 7240 6970 6429 6383 540 1~ 08/11/88 15 94 92 ~.0 5.0 6860 6900 6880 6466 6667 40 13 08/26/88 i5 84 92 5.0 5.0 6000 6000 6000 6430 6617 14 08/26/88 15 ~4 94 5.0 5.0 5750 5750 ' 57~0 6382 6210 15 08/31/88 15 87 91 5.5 N/A ~890 5890 5890 6349 5880 16 09/01/88 10 78 84 7.5 N/A 6540 6890 0715 5372 5118 350 17 09/01/88 11 80 8~ 7.0 N/A 6250 6380 6315 6369 5)07 ~t0 18 09/06/88 10 61 8~ 8.5 N/A 6390 62i0 6~00 6365 6443 180 19 09/06/88 10 64 85 5,7 N/A 6710 6800 6755 6385 6457 90 ~0 09/07/88 15 67 77 5.0 3,5 7360 7400 7380 6435 6812 40 21 10/11/88 15 58 75 4.5 N/A 6980 6790 688~ 6456 7007 190 22 10/11/88 15 60 76 5.0 N/A 5993 6060 6925 6437 6763 70 23 12/20/89 18 40 59 3,0 3.7 6370 6480 6425 5436 6445 110 24 el/05/90 !B 41 7~ 2.5 $.5 7150 6760 6955 6458 6~68 390 25 01/08/g0 !B 7~ 70 3.0 3.0 6790 6450 6620 6464 6667 340 26 01/~0/90 18 7~ 73 2.7 3.0 6330 6~80 6455 6464 ~677 250 27 01/11/90 18 61 68 2.5 3.0 7780 7730 7755 6512 6943 50 28 01/12/90 18 54 64 2.5 3,5 7390 7260 7325 6541 7178 130 ~9 0~/15/90 18 70 75 4.0 4,5 5910 5919 59~0 6519 5997 30 03/07/91 12 60 65 3,2 2.9 6520 6520 6525 6519 6565 *** Averages -** 73 82 4,7 4.! MIX # 9377 ?.5OSK ADMIX/A~A 1'CS 6000 PS! ~ 2B, Days AS REQUIRED Maximum Coarse Aggre§ate Size: ASTM C 33 1"- #4 Crushed Stone maximum Water/Cement Ratio: 4.40 gal/ak .389 lb/lb Minimum Cement Content per Cubic Yard: 1.SO sacks mBximum PlaCement Slump: 6.0 inCheS Admixture ASTM C-494: Type A or D Air £ntraining Agent ASTM C-260: 3% - 6% MATERIAL QUANTITIES PER 1 CUBIC YARD AT $.S.D. 1OS lbS. or ?.SO sacks ASTM C 150 lype I Cement 1B40 lbS. AS?M C 33 1"- #4 Crushed Stone 1132 lbS, ASTM C 33 Concrete Sand 27~ lbs. or 33.0 gallons of Water 2.0 to ~,O oz/cwt of ASTM C.494 Type D Specifiea Air Content: 3% - 6% Placement Slump: 5.0 · or - 1 inches