CF-Cozby Library-LR 940523 (5) E GEE Consultants. Inc.
E INVIRONMENTAL
2540 Glenda Lane · Suite 108 · Dallas, Texas 75229 · (2141 620-9791 · Fax (214) 620-9794
STATISTICAL ANALYSIS OF CONCRETE NHX DESIGN
Report Date: May 23, 1994 Sample Dar,': May, 1994
Client: City of Coppell
Project: W.T. Cozby Public Library
Identification: Statistical Analysis of Compressive Strength Test Results
Method of Test: ACI 214-77, ACI-318
Mix No: 8203
Required Compressive Strength at 28 days: 3000PSI
Month ending: Ma.,,', 1994
Test Cast Average 7 Day Average 28 Day 28 Day Moving Cumulative
No. Date Strength (PSI} Strength (PSI) Average of Last 3 (PSB 28 Day Average ;.PSB Remarks
WTC 06 4/19;94 3.555 4,530 --- 4.530
WTC 16 4i22:94 2.415 3.970 --- 4.250
WTC 21 4/25i94 4,600* 4.830 4,443 4,443 * 24 day break
WTC 26 4/27/94 2,415
w'rc 31 5.,05:94 3.165
%¥-~C 36 5/06."94 2.320
w'rc 41 5/09:94 3.265
Total number of completed 28 day tests: 3
28 da3' average compressive strength (PSI/: 4.443
28 da3' standard deviation IPSI'I: 437
28 day coefficient of variation I '~.'}: 9.8
cc: Gary. Sieb - City of Coppell
Larry. Davis - City of Coppell
Mike Sherpinskas - Diversified Construction Services..,I-n-e. ,/
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Jim Bullock - F & S Partners ./-)/'2'.,
Russell Williams - Brockette Davis Drake, Inc....~',
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