CF-Cozby Library-LR 940822 G EOTECHNICAL
ENGINEERING GEE Consultants, Inc.
2540 Glenda kane · Suite 108 ° Dallas, Texas 75229 ° (214) 620-9791 · Fax {214) 620-9794
STATISTICAL ANALYSIS OF CONCRETE MIX DESIGN
Rcpo~ Da~: August 22, 1994 Sample Dat~: August, 1994
Client: City of Coppell R,po, No.: 7
Project: W.T. Cozby Public Library
Idcntit~¢ation: Statistical Analysis of Compressive Strength Test Results
M¢~od of Test: ACI 214-77, ACI-3!8
Mix No: 45
Required Compressive Strength at 28 days: 3000PSI
Month ending: August, 1994
Test Cast Average 7 Day Average 28 Day 28 Day Moving Cmnulative
No. Date Strength (PSI) Strength (PSI) Average of Laat 3 (PSi) 28 Day Average (PSI) Remarks
WTC 51 5/'14/94 2.900 4.050 --- 4,050
WTC 56 5/20/94 3,120 4,545 --- 4,298
WTC 61 5/24/94 3.080 4,285 4,295 4,293
Wq'C 91 6/21/94 3,465 4,505 4,445 4,346
W'I'C 96 6/21/94 3,350 4,220 4,337 4,321
WTC 101 6/21/94 3,095 4,120 4,282 4,288
WTC 106 6/27;94 3,510' 4,440 4,260 4,309
WTC 11 i 6/27/94 · 3,395* 4.125 4,228 4,286
WTC 116 6/27/94 3.565* 4,170 4,245 4,273 * 8-day break
Total number of completed 28 da)' tests: 9
28 day average compressive strength (PSI): 4.273
28 day standard deviation (PSIS: 182
cc: Gary Sieb - City of Coppell Larry Davis - City of Coppell
Mike Sherpinskas - Diversified Construction Services, Inc.
Jim Bullock - F & S Partners
Russell Williams - Brockette Davis Drake, Inc.
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