ST8201-CS 900126 GINN, CONSULTING ENGINEERS
January 26, 19~
Mr. Scott Belch, P.E.
L. H. Lacy C__~~ ~
Re: ~nton Tap Road Improvements from Belt Line Roa
Sandy Lake Road and from Sandy Lake_Road to Denton Cre~ -
epalr of Problem Pavement Texture Areas
Dear Mr. Belch:
We have given careful consideration to your letter of December
18, 1989 proposing remedies to pavement texture problems on both
projects. After further consideration of the situation we
believe that for the time and effort required from all parties
concerned, and our level of confidence in the long-term
effectiveness of the program you propose, it may be more
reasonable to require L. H. Lacy co. to furnish a five-year
maintenance bond covering necessary repairs or remediation of
pavement in the areas noted with unacceptable texture, and also
in the areas in which the sawed joints are unacceptable.
Please consider the foregoing and respond with your comments,
acceptance, or other ideas as soon as possible. Call me if you
have any questions.
Sincerely,
John ¢. Karlsruher,
Project Engineer
cc: Steve Goram
H. Wayne Ginn, P.E.
Randy Fleming
Files 378 & 379
17103 Prcston Road ® Suite 100 · LB 118 · Dallas, Texas 75248 ·Phonc 214/248-4900
December 18~ 1989
Mr. John C. Karlsruher, P.E.
Ginn, Inc.
17183 Preston Road, Suite
Dallas, TX 75848
LB 118
RE:
Denton Tap Road Improvements
Beltline Road to Sandy Lake Road
Sandy Lake Road to Denton Creek
Repair of Problem Pavement Texture Areas
Dear Mr. Karlsruher:
After careful consideration, we would
following plan of attack for "smoothing
pavement where the surface is
A.
We feel
A.
Your
appreciated, as we would
weather permits.
like to propose the
out" the areas of
too rough.
Thoroughly clean pavement surface free of dirt, oil,
Apply SikaTop 128 mortar, floating into voids.
Allow time to set, then retyne.
this will provide an acceptable remedy for the following
The pavement sections in question are of sound quality;
that is, they are proper depth and strength.
The ride is acceptable.
There are no drainage problems to contend with.
The SikaTop product provides greater bonding strength
and flexural strength than the existing pavement (see
enclosed technical information).
immediate attention to this matter would be greatly
like to perform the work as soon as the
Respectfully,
Scott J. Balch, P.E.
Senior Project Manager
L. H. Lacy Company
General Contractors
214/357-0146
"Oualily Conslruclion Ioz over 65 Years"
10888 Shady Trail
P.O. Box 541297
Dallas, Texas 75354-1297
Polymer-modlhed, porlland-cement, trowel-grade mortar
Technical Data'"
Descriplion:
SikaTop 122 is a polymer-modilied, portland-cement, 2-component, fast-setting, trowel-
grade, easy tooling patching mortar. I1 is excellent for horizontal and vertical surfaces.
Where Io Use:
· On grade, above, and below grade on concrete and mortar.
· On horizontal and vertical surfaces.
· As an overlay syslem...see SikaTop Overlay System data sheet.
· As a structural repair material Ior parking structures, industrial plants, walkways,
bridges, tunnels, dams, and ramps.
· To level concrete surfaces.
Advanlages:
· Greater abrasion resistance than conventional portland-cement mortar.
· Bond strength insures superior adhesion.
· Compatible with coefficient of thermal expansion of concrete - Passes ASTM C-884
(modified).
· Increased resistance to deicing salts.
· High early strengths.
· No mix water...Component 'A' liquid co-polymer triggers special blend of cements/
aggregates/patented accelerators/admixlures.
· Easy-to-use; fast-setting, labor-saving system.
· No on-site batching.., plant-proportioned packaging insu~'es constant composition,
consistent high quality.
· No mistakes. Easily mixed...even by hand; trowels easy, cures fast.
· High compressive and flexural strengths.
· Good freeze/thaw resistance.
· Easily applied to clean, sound substrate.
· Not a vapor barrier.
· Not flammable.
· System may be finished with a power trowel.
· Opens to traffic fast: foot in 1-2 hr, pneumatic tires in 4-6 hr.
· Conforms to ECA/USPHS standards for sudace contact with potable water.
· USDA approved.
Yield: 0.5 cu fi/ unit.
P. ackaging: Component 'A' - 1-gal plastic jug; 4/carten.
Component 'B' - 61.5-1b multi-wall bag.
Typ.lcal I~ata for SikaTop 122:
(Material and curing conditions @ 73F and 50% RH)
Shelf Life: One year in original, unopened packaging.
Slorage Condilions: Store dry at 40-95F. Condition material to 65-85F belore using. Protect Component 'A' from
freezing. Il frozen, discard.
Color: Concrele gray when mixed.
Mixing Ralio: Planl-proportioned kit, mix entire unit.
Applicalion Time: Approximately 15 mtn after adding Component 'B' to Component 'A'. Mortar remains plastic for
a longer period, but will have less adhesion after this period of time. Application time is
dependent on temperature: shorter when hot, longer when cold.
Finishing Time: 20 to 60 mtn after combining components: depends on temperature, relative hunlidity, and type
of finish desired.
Compressive Strength:
ASTM C-109 ASTM C-39
(mortar] (concrete]*
2 hours 250 psi 4 hours 400 psi
1 day 2,000 psi 1 day 1,800 psi
3 days 6,000 psi 3 days 4,200 psi
7 days 6;500 psi 7 days 5,000 psi
28 days 8,800 psi 28 days 6,000 psi
Flexural Slrength (ASTM C-78):
(morlarJ (concrete]*
1 day 500 psi 100 psi
7 days 1,700 psi 900 psi
28 days 2,000 psi 1,100 psi
Splitting Tensile Strength (ASTM C-496):
I day 300 psi 100 psi
7 days 800 psi 500 psi
28 days 1,100 psi 600 psi
Bond Strength** (ASTM C-882 modified]:
I day 500 psi
7 day 1,600 psi
28 days 2,200 psi
*Testedwith an addition rateof 421bol clean, well-graded, saturated sudace dry, low-absorption and high-density
coarse aggregate.
**Mortar scrubbed into substrate
How To Use
Subslrale: Concrete, mortar, and masonry products.
Surface Preparalion:
Remove all deteriorated concrete, dirt, oil, grease, and all bond-inhibiting materials from
surlace. Be sure repair area is not less than % in. in depth,
Preparation work should be done by scabbler or other appropriale mechanical means to obiain
an aggregate-fractured surface with a minimum sudace profile of ::t: 1/16 in.
Salurate surface with clean waler. Substrate slmuld be saturated surface dry (SSD) with no
standing water during application.
Mixing: Mix manually or mechanically· Manually mix in a wheel barrow or morlar box. Mechanically
mix with a Iow-speed drill (400- 600~rpm) and paddle or in appropriate-size mortar mixer.
Mixing Procedure: SikaTop 122 morlar: Pour approximately 4/5 of Component 'A' into mixing container. Add
Component 'B' while continuing fo mix. Mix to a unilorm consistency, maximum 3 minutes. Add
remaining Component 'A' to mix if a more loose consistency is desired.
For SikaTop 122 concrete: Pour all of Component 'A' into mixing container. Add all el Component
'B', then introduce aggregate at desired quantity (max 42 lb/unit). Mix to unilorm consistency,
maximum 3 minutes.
For applications greater than 1 in. in depth, add a minus ~/2-in. or 3/8-in. coarse aggregate to
SikaTop 122 to produce SikaTop concrete. The aggregate must be clean, well-graded,
saturated surface dry, and have iow absorption and high density·
Nole: Variances from this aggregate may result in different strengths. The addition rate must
not exceed 42 lb of aggregate/unit of SikaTop 122.42 lb of coarse aggregate is approximately
3.0-3.5 gal by loose volume. The yield is increased to 0.75 cu ft!unil with the addition of the
aggregate. Do not use limestone aggregate.
Application &
Finish:
At the time of application, surfaces sllould be saturated surface dry (SSD) with no standing
wafer. Mortar or concrete musf be scrubbed into the substrate, filling all pores and voids, Force
material against edge of repair~ working toward center. After filling repair, consolidate, then
screed. Allow mortar or concrete to set to desired stiffness, then finish with wood or sponge
float for a smooth surlace, or broom or burlap-drag for a rough finish.
Important: Maximum bond is achieved with application of a scrub coat on a properly prepared,
saturated surface dry subsfrate. Priming with Component 'A' is not required and should not
replace scrubbing the material into the substrate.
Curing:
Curing is not required under most conditions. Moist cure with a fine mist spray of water, wet
burlap, or non-solvent-based curing compound* if ambient conditions might cause premature
sudace drying: I~igh temperatures, iow humidity, or strong winds.
If necessary, protect newly applied material from rain. To prevent freezing, cover with
insulating material.
*Pretesting of curing compound is recommended
· Minimum application thickness Y8 in.
· Minimum ambient and surface temperatures 45F and rising al time ol application.
· Protect Component 'A' from freezing. I1 lrozen, discard.
· Apply only on clean, sound, properly prepared substrate. Surface should be damp but lree ot
standing water (SSD).
· Mortar or concrete must be mixed to a unilorm consistency. Eliminate lumps. Do not
over-mix (3 minules max).
· Do nol use solvenl-based curing compound.
· For repairs grealer lhan 1 in. in depth, add coarse aggregate. Do nol use limestone
aggregate.
Caulion:
Irrilanl:
Firsl Aid:
Clean Dp:
Componenl 'B' contains portland cement and cryslallinedree silica. Avoid breathing dust; use
with adequate ventilation.
Both components are, skin- and eye-irritants; avoid contact. The use of a NIOSH/MSA
approved respirator, safety goggles, and rubber gloves is recommended. Remove contaminated
clothing.
In case ol contact, Ilush eyes with water for 15 mtn, contact physician. Wash skin wilh soap
and water. Wasl~ clolhing before re-use.
Componenl 'A' - Dilute with water. Dispose of in accordance with applicable local regulations·
Componenl 'il'. Sweep into appropriate container. Dispose of in accordance with applicable
local regulations.
Mixed components: Uncured material can be removed with water. Cured material can only be
removed mechanically
KEEP CONTAINER TIGtlTLY CLOSED KEEP OUT OF REACH OF CHILDREN
NOT FOR INTERNAL CONSUMPTION FOR INDUSTRIAL USE ONLY
CONSULT MATERIAL SAFETY DATA SHEET FOR MORE INFORMATION .s
Executive Office: P.O. Box 297, Ly:3dhursl, Nd 07071 · Tel 201-933 8800- TWX 710 989-0108 - FAX 201.933-9379
Regional* and District Sates OUices
CA. Santa Barbara ......... 805-564-3111
*CA, Santa Fe Springs ...... 213-941-0231
CA. Union Citg ........... 415-487-2294
CO, Denver .............. 303-458.7452
CT, Norlhlord ............ 203.484-2551
FL, N. Miami Beach ........ 305-940-1959
*FL, Tampa ............... 813-933-5259
GA, Allanta .............. 404-761-7143
'*IL, Des Pbines ............ 312-298-2810
IN, Indianapolis ........... 317-843-0274
MA, Marblehead .......... 617.631-9247
MD, Towson ............. 301-583 ]861
MI, Farminylon Hills ....... 313-552-1012
MN, Bloorninglon .......... 612-854-6577
MO, Kansas Cily .......... 816.921-1022
MO, St. Louis ............ 314-231-5499
"NJ, Lyndhursl ............ 201.933-8800
NY, Albany .............. 518-452-7453
OH, Cheslerland .......... 216-729-4200
*OH, Columbus ........... 614-476-3335
PA, Carnegie ............. 412.279-1176
PA, King of Prussia ........ 215-783-5604
SC, Spartanbur§ .......... 803.573-8867
TX, Dallas ............... 214-386-7452
TX, Greenville ............ 214-454-6030
TX, Houston ............. 713-461-3010
VA, Richmond ............ 804-271-4029
VT, Montpelier ........... 802-229-4905
WA, Seattle .............. 206.762-3829
WI, Milwaukee ............ 414-272.3100
Export Division
NJ, Lyndhursi ............. 201.933-8800
TWX .................... 710-989-0108
Telelax .................. 201.933-9379
A SIKA CORPORATION