CF-Cozby Library-LR 940726 (4)J G EOTECHNICAL
E GEE Consultants, Inc.
2540 Glenda Lane · Suite 10g · Dallas, lexas 75220 · (214) 620-~791 · Fax (214) 620-9794
STATISTICAL ANALYSIS OF CONCRETE 1V[IX DESIGN
Repo~ Date: July 26, 1994 Sample Date: July, 1994
Client: City of Coppell
Project: W.T. Cozby Public Library
Identi6¢ation: Statistical Analysis of Compressive Strength Test Results
Me.od of Test: ACI 214-77, ACI-318
Mix No: 45
Required Compressive Strength at 28 days: 3000PSI
Month ending: July, 1994
Test Cast Average 7 Day Average 28 Day 28 Day Moving C-mulative
No. Date Strength (PSI) Strength (PSI) .Average of Last 3 (PSI} 28 Day Average (PSI} Remarks
WTC 51 5;14/94 2,900 4,050 --- 4,050
V~q'C 56 5/20/94 3,120 4,545 --: 4,298
WTC 61 5/24/94 3,080 4,285 4,295 4,293
WTC 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'
WTC 111 6/27/94 3,395*
WTC 116 6/27/94 3.565' * 8-day break
Total number of completed 28 day' tests: 6
28 day average compressive strength {PSI): 4.288
28 day standard deviation (PSI'I: 201
28 dav coefficient of variation (%.): 4.7
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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