Stratford Manor-LR 990520 341 Wes! lYlockingbi~'d L~ne · Dell3$, Texes 75247 · 972.647.6700 · www, txi.con~
May 20, 1999
Texas Inlets
P.O. Box 210093
Bedford, TX 76095
A~tn: Mr. Ronnie Stone
Drainage Structures - City of Coppell
8274
The attached concrete mix design utilizing the appropriate ASTM
C-33 or ASTM C-330 aggregate is proposed for use on the above
referenced project for ready-mixed concrete to be furnished by
TXI.
To ensure that the correct mix is delivered to your project,
please order by the mix design number which appears in the upper
left hand corner of the mix design.
Texas Industries certifies that the above mix design, when
ordered by specified design identity, and delivered by TXI, will
meet or exceed the indicated design strength at the designated
age when tested in accordance with the applicable and current
ASTM Standards C 31, C 39, C 78, C 172, C 293, applicable
provisions of C 94, and evaluated in accordance with applicable
provisions of the ACI 318 Building Code.
TXI would like to be included on your mailing list to receive all
test reports. ASTM C 94 entitles a manufacturer to receive
copies of all test reports when strength of concrete is used as a
basis for acceptance.
Contact us if you have any questions or req%/ire any additional
information. Please notify TXI of approval of the proposed mix
design prior to its use. Failure to notify us prior to first
placement shall constitute acceptance. To ensure that ~he proper
mix design is ordered, please send a copy of this letter, after
approval, to the above referenced project to be used by the
person ordering the concrete for this job.
Sincerely,
TXI Operations, LP
Michael A. Caldarone, P.E.
Manager - Q.A. / Q.C.
Mix #: 8274
Description: 6.00SKADMIX/A~A I"CS
Strength: 3600 psi ~ 28 Days
DRAINAGE STRUCTURES
Maximum Coarse Aggregate: 1" #4 CRUSHED STONE
Maximum Water/Cement Ratio: 5.17 gal/sack or 0.457 lbs/lb
Cement/Cementi=iou~ content: 6.00 sacks (per cubic yard)
Maximum Placement Slump: 5.00 inches
Air Entraining Agent: ASTM C-260
Admixture: ASTM C-494 Type A or D
MATERIAL QUANTITIES PER 1.0 CUBIC YARD AT S.S.D
564 lbs. ASTM C 150 TYPE I CEMENT
1840 lbs. 1" - #4 CRUSHED STONE
1273 lbs. CONCRETE SAND
258 lbs. or 31.0 Gallons of Water
2.0 to 4.0 oz/cwt of ASTM C-494 Type D
Specified Air Con=ent: 3.0% - 6.0%
Placement Slump: 4.00 + or - 1.00 inches
PUMPING NOTES / RECOMMENDATIONS
1. 5" minimum diameter lines with no reduction to smaller
lines.
2. Keep rubber hose to absolute minimum length and plan pipe
with as few 90 degree angles as possible.
3. Samples for slump and strength tests should be taken ~
discharge end of hose for strength guarantee to be valid.
4. To prime pump.lines, a minimum of 8.0 sack grout should be
used for lubrication. In the case of strength concrete,
equivalent strength grout should be used if the grout
remains in the placement.
5. Pump mixes are based on minimum cement content pumped at
ground level. As pump line increases in length or height
and/or layout configuration changes, additional cement may
be required to assure strength and pumpability at additional
cost to the contractor.
6. TXI cannot control, and is therefore not responsible for
excessive loss of entrained air content when loss occurs as
a result of boom configuration or free fall discharge from
hose. To ensure minimum air loss when pumping, maintain a
continuous flow of concrete through the entire length of
pipe and do not subject concrete to free fall.
7. The term "pum~able concrete" refers to concrete which is
capable of being transported through an apparatus which
forces concrete to the placing position through a pipeline
or hose as long as the recommendations indicated above are
followed. The term "pumpable concrete" does not relate to
concrete proportioned in a particular manner or containing a
specific type of product.
U~less otherwise indicated, when the concrete temperature at
point of placement exceeds 90 degrees F, TXI will guarantee the
strength performance of the mix design(s) herein submitted up to
a maximum placement temperature of 100 degrees F using an ASTM C
494 Type D retarding water-reducer, as long as the concrete is
placed within 75 minutes from batch time.
We are enclosing all available back up data for the referenced
mix design(s). If the strength information is not available, or
is insufficient, confirmation tests may have to be conducted by
your laboratory.
Strength of lightweight mix designs valid provided strength
specimens are cured in accordance with ASTM Test Method C 567, as
referenced in section 8.1 of ASTM Specification C 330.
I 01/~4/99 61 E.O0 6,4% 4670 4870 47~0 4770 200
3 01/18/~9 31 48 ~9 6,00 3,9% ~310 4880 ~09~ 4907 4907 430
4 01/16/99 31 42 60 ~.~0 4,0~ 4880 S060 G970 4923 4973 180
5 01/20/~9 43 ~3 64 5.75 N/A 4790 ~020 4905 49~9 4990
6 01/20/99 43 SO 6~ 6.25 N/A 4330 G61O 4470 4844 4792 28o
T 01/20/99 43 4~ 61 ~.g0 N/A 4980 4840 4910 4854 4762 140
8 01/2~/99 43 S6 68 S.00 4.7% 4250 34~0 3860 4~29 4413
9 01/25/99 43 S6 67 5.25 4,8t 56?0 s220 5445 4B09 4?38
10 01/25/99 43 52 69 5.50 4.9% S2O0 4920 S06O 4~34 4788 280
11 01/25/99 43 46 6& ~,75 5.2% 4~g0 4020 4305 4786 4937 570
12 01/25/99 43 S7 67 ~.75 5,0% 4590 4730 4660 &775 4675
14 02/08/99 63 65 3.2S 4.9% S230 S280 5205 4~gt 4785 ~0
15 02/08/99 77 ~3 3.50 4.3~ S4~0 5580 5495 4833 5063 170
16 02/0~/99 74 6~ 3.50 4.0~ E6VO S280 ;~qS ~873 ~392 390
17 02/08/99 76 69 3.00 4,0% 5570 S4qO 5520 4911 5497 ~00
18 02/08/99 G9 64 a.50 4.6% 4270 4050 ~160 4869 SOS~ 220
19 02/0B/99 73 g6 ~.00 %.94 5150 ~850 5000 4896 4893 300
20 02/08/99 ~6 73 3.00 4.04 5620 SSIO 5565 4911 ~908 110
~I 03/08/99 ?q 74 3.00 4.Or 5130 S430 5280 492~ S282 300
22 0~/08/99 ~3 69 3.00 ~.34 5580 5580 S~6~ ~957 ~&~O
23 02/09/99 64 6S 3,50 ~,24 5710 SS40 5625 49~ 5490 1~0
24 02/08/99 S9 66 S.O0 N/~ 4650 4570 ~610 ~9~1 5267
25 03/08/99 73 TO 2.75 3.7t ~300 5270 528~ 4983 51~3 30
2& 02/08/99 ~6 93 3.75 3.0% 5240 S490 5365 4998 5087 ~0
2~ 02/09/99 79 4.S0 4.64 4270 4130 ~200 496B 4950
2e o2/zs/ss To 4.50 ;.lt 5320 S200 5260 4979 4942 120
29 02/19/99 S9 70 4.7S 5.0% 6120 6050 6095 5017 5182 qO
30 02/24/99 16 71 63 4,75 H/A 4q40 4820 4780 5009 5375 80
COMMENTARY OF STATISTICAL EVALUATION OF CONCRETI DESIGN RESULTS
Mix Num: 8274 Strength: 3600 pst · 28 Days
Paragraph 5.5 of ACI 318-95 provides that as data becomes
available during construction, the amount by which (F'cr) must
exceed the specified value of (P'c) may be reduced, provided:
(a) 30 or more test results are available and average of
test results exceeds that required by Section 5.3.2.1,
using a standard deviation calculated in accordance
with Section 5.3.1.1, or
(b) 15 to 29 test results are available and average of test
results exceeds that required by. Section 5.3.2.%, using
a ~tandard deviation calculated in accordance w~th
Section 5.3.1.2.
The required average compressive strength has been calculated
using a standard deviation calculated in accordance with
ACI 318-89 Section 5.3.1.1 or Section 5.3.1.2 and is the larger
value of these calculations:
F'cr = F'c + 1.34(SD)
- 3600 + 1.34( 513.1)
= 4288
F'cr ~ F'c + 2.33(SD) - 500
- 3600 + 2.33( 513.1) - 500
~ 4296
SUMMARY OF 9TATISTICAL ANALYSIS
28 Day Test Data
Number of Tests .......................... 30
Maximum Value ............................ 6085 psi
Minimum Value ............................ 3860 psi
Range .................................... 2225 psi
Average Strength ......................... 5009 psi
Standard Deviation ....................... 513 psi
Required Average Strength to satisfy
minimum probability conditions of
ACI 318-89 Section 5.3.2.1 ............... 4296 psi
Design excess beyond code requirements... 713 psi