CF-Cozby Library-LR 940624 (2) G EOTECHNICAL
E GEE Consultants, Inc.
2540 Glenda Lane · Suite 10g · Dallas, Texas 7522~ · (214) 620-~791 · Fax (214) 620-~794
STATISTICAL ANALYSIS OF CONCRETE MIX DESIGN
Repo~ Daw: June 24, 1994 Sample Daw: June, 1994
Client: City of Coppell
Pmj¢ct: 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: June, 1994
Test Cast Average 7 Day Average 28 Day 28 Day Moving Cumulative
No. Date Strength (PSI) Strength (PSI) Average of Last 3 (PSI} 28 Day Average (PSI) Remarks
WTC 06 4/i9/94 3.555 4,530 --- 4,530
w'rc 16 4/22.,94 2.415 3,970 --- 4,250
WTC 21 4,'25/94 4.600- 4,830 4,443 4,443 * 24 day break
WTC 26 4/27/94 2.415 3,530 4,1 I0 4,215
N~'I~C 31 5/05/94 3.165 4.285 4,215 4,229
WTC 36 5,.'06,"94 2.320 3,550 3,788 4,116
%7C 41 5/09/94 3,265 4,350 4.062 4,149
W'FC 46 5/18/94 3.260 3,875 3,925 4,115
WTC 66 5/31/94 2,920
w-rc 71 6i01/94 2,745
WTC 76 6i03/94 2,610
WTC 81 6;07 ;94 2,640
Total number of completed 28 day tests: 8
28 day average compressive strength (PSI): 4,115
2S day standard deviation (PSI%: 464
28 day coefficient of variation (%): 11.3
cc: Gary Sieb - City of Coppell ~///~; ~f / ~
of
Mike Sherpinskas - Diversified Construction Services, Inc.
Jim Bullock - F & S Partners
Russell Williams - Brockette Davis Drake, Inc.
AH ielt~m and ~ am foe fl~ ex¢lu~i,n ua~ of th: clt,.~t Io whom thty t~ add~n~d and shall n~. Im i*~p~lut:~l withtxtt th~ fid] apln'o~al of GEE Comult~nts. ln~. Th~ u~ of eta' nan~ m~t t~ei~
out p~ioe ~.rittsna approval. Out [~t~rs ar~ ~ al~ly only to th~ sat~pl~ t~al~d afl,'or i~p~t~d and af~ no~ ['s~e, ssal~ly indi~ati,~ of tl~ quantities of apparently idm~fical of aimi]al' pf~lut~.