ST9401-CS 990112i
9724448234
JAN -12 -99 TUE 09:41 Aft REBCON, INC FAX NO. 9724448234 P.01/06
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ORIGNAI.. TO FOLLOW VIA ✓LAIC NO ORIGENAL TO FOLLOW
JAN -12 -99 TUE 09;42 AM REBCON, INC FAX NO, 9724448234 P,02/06
1341 Wcst Mockingblyd lane • Dallas, Texas 75247 • 972.647,6700 • wwwtxi.com
January 12, 1999
Rebcon, Inc.
1868 W. Northwest Highway
Dallas, TX 75220
Attn: Mr. Robert Bibby
RE: Denton Tap Road
City of Coppell
8294
The attached concrete mix design utiliza.nq 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
TX1.
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 garner of the mix design.
Texas Industries certifies that the above mix design, when
ordered by specified design identity, and delivered by TXI, will
meet o3� 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.
TXT would like to be included on your mailing lint 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 require 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 t hat the 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.H,
Manager - Q.A. / Q.C.
JAN -12 -99 TUE 09:42 AM REBCON, INC
FAX NO, 9724448234
Mix #: 8294
Description,: 7.00SR ADMXx /AEA 3 /8 "PG
Strength: 4000 psi ® 28 Days
RAILING
Maximum Coarse Aggregate: 3/8"
Maximum Water /Cement Ratio: 4.57
Cement /Cementitious Content: 7.00
Maximum Placement Slump: 4.00
Air Entraining Agent: ASTM
Admixture: ASTM
- #10 PEA GRAVEL
gal /sack or 0.406 lbs /lb
sacks (per cubic yard)
inches
C -750
C--494 Type A or D
MATERIAL QUANTITIES PER 1.0 CUBIC YARD AT S.S.D
658 lbs. ASTM C 150 TYPE 1 CEMENT
1680 lbs. 3/8" - #10 PEA GRAVEL
1310 lbs. CONCRETE SAND
267 lbs. or 32.0 Gallons of Water
2.0 to 4.0 oz /cwt of ASTM C -494 Type A
Specified Air Content: 3.0k - 6.0%
Placement Slump: 3.00 + or - 1.00 inches
P. 03/06
JAN -12 -99 TUE 09;42 AM REBCON, INC FAX NO, 9724448234 P.04/06
PUMPING NOTES / RECOMMVMATIONS
i. 5" minimum diameter lines with no reduction to smaller
1. fines .
2. Keep rubber hose to absolute minimum length and plan pipe
with as few 90 degree angles as possible.
a. Samples for slump and strength tests should be taken 0
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 lacement.
5. Pump mixes are based on minimum cement content pumped at
ground level. As pump lane 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.
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.
Cement, aggregate, and admixture certification have already been
submitted.
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JAN -12 -99 TUE 09;43 AM REBCON, INC
FAX NO. 9724448234
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mix tease 9794 ItseaPtAl 4000 pat f 7S Paws
39 Pay Teat Data
Temperature
Test P1eaC (eahroaheit) Placement
wuwber Date 9Nvdbwx Audbimr Concrete 81ump(in)
1 Ca /16/95 e7 95 3.00
2 12/11/97 39 39 95 5.24
••• Avp ;ages =_* 39 70 4.13
P, 05/06
Pc:eeat --- - - - - -- 28 Day -- - -•- Cvw,ulatiw Moving
of Air PSI 1 PSI 2 Pd1 Avg Avv rage Avg of 3 range
N/A 6490 4500 6495 6495 110
3.0% 9660 S920 5790 6143 260
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JAN -12 -99 TUE 09:43 AM REBCON, INC
FAX NO. 9724448234
C of :IT91 I8T =CAL SVAL ION OF COl�TCRBTE DESZ RLrSULTS
K:Lx arum: 8294 Strength: 4000 psi ! 2S Days
Paragraph 5.5 of ACI 318 -89 provides that as data becomes
available during construction, the amount by which (F'cr) must
exceed the specified value of (F'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 5.3.2.1, using
a standard deviation calculated in accordance with
Section 5.3.1.2.
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Unable to calculate standard deviation due
* to the fact that less than 15 tests exist
SUNKARY OF STATISTICAL ANALYSIS
28 Day Test Data
Number of Tests .......................... 2
Maximum Value ............................ 6495 psi
Minimum Value ............................ 5790 psi
Range ........ ......................... 705 psi
Average Strength......... 6143 psi
Required Average Strength to satisfy
minimum probability conditions of
ACI 318 -89 Section 5.3.2-1... . .........
Design excess beyond code requirements...
P, 06/06