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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. i