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Download Specs for Sher-Crete Dust And
Salt Protectant
SECTION 03360 - SPECIAL CONCRETE FLOOR FINISHES
PART 1 GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including
General and Supplementary Conditions and Division
____________ Specification Section, apply to this Section.
1.2 SUMMARY
A. This Section includes polished concrete finish in
accordance with Hardscapes™ concept for interior concrete
flatwork. Polished concrete finishes for precast concrete,
vertical cast-in-place concrete, and exterior concrete are
specified in the sections for those types of concrete.
B. Furnish all labor, material, equipment and services
necessary for the dry diamond grinding and polishing of
concrete floors in accordance with the Hardscapes™ concept.
C. Applying densifying impregnator/sealer and polishing to
specified sheen level and aggregate exposure.
D. Concrete must be cured a minimum of 28 days prior to
polishing.
1.3 REFERENCES
A. American Concrete Institute (ACI):
1. ACI302.1R-89, Guide for Concrete Floor and Slab
Construction.
B. American Society for Testing and Materials:
1. ASTM C779, Standard Test Method for Abrasion of
Horizontal Concrete Surfaces.
2. ASTM C805, Impact Strength.
3. ASTM G23-81, Ultraviolet Light & Water Spray.
4. ASTM 1028, Co-efficient of Friction.
5. ASTM C 150, Type I, II Portland cement conformity,
depending on soil conditions.
6. ASTM C 33, Aggregate conformity.
C. Other Tests:
1. Reflectivity. Measured in candle power.
2. Gloss reading.
1.4 SUBMITTALS
A. Submit the following in accordance with Division ______
Section “Submittal Procedures”.
B. Product data for each grinding machine, including all
types of grinding heads, dust extraction system, joint
filler, concrete densifying impregnator, penetrating sealer,
and any other chemicals used in the process.
C. Applicators qualification data.
D. Polished concrete samples: size _______, for each
Polished Concrete finish required.
1.4 QUALITY ASSURANCE
A. Basis of design: Hardscapes™, manufactured by Global
Polishing for Sherwin Williams.
B. Approved Applicators:
1.__________________________________________________
2.__________________________________________________
3.__________________________________________________
C. Pre Installation Conference: Conduct conference at
project site to comply with requirements in Division ______,
Section “Project Management and Coordination”.
D. Provide project names, addresses, contact names, phone
numbers of at least (3) three projects of similar scope
completed by the installer.
E. Installer/applicator shall be certified by concrete
finish equipment and chemical manufacturer and shall provide
adequate number of skilled workmen who are thoroughly
trained and experienced in the necessary craft.
F. Manufacturer’s Certification: Provide a letter of
certification from both the equipment and chemical
manufacturer stating that the installer is a certified
applicator and is familiar with proper procedures and
installation requirements recommended by the manufacturer.
G. Mock-ups:
1. General Contractor to notify applicator 7 days prior to
pour to schedule finish of mock- up.
2. Reserve 100 square feet for each color and finish at
location adjacent to floor that will receive polish, but
will be covered with another flooring material. Mock-up
floor shall be placed on the same day, preferably the same
pour as the floors to receive polish.
3. Install mock-ups to verify selections made under sample
submittal and to demonstrate methods and workmanship
proposed for the project. If mock-up not possible, submitted
samples will be accepted as demonstrated methods &
workmanship.
4. Aggregate selected must be tested to ensure it will
accept polish.
5. If stand alone mockup required, form should be clean and
free from extraneous substance and be at least a 12’ x 12’
with a level plywood bottom on level ground with
unobstructed access around all four sides.
6. Control joints should be included in mock-up. Sawing
performed by General
Contractor can begin as soon as the surface is firm enough
not to displace any of the aggregate.
7. Edges should be included in mock-up.
8. Approved mock-ups may become part of the completed work
if undisturbed at time of substantial completion.
H. Protection: General Contractor shall protect areas to
receive polished concrete finish at all times during
construction to prevent oils, dirt, metal, excessive water
and other potentially damaging materials from affecting the
finished concrete surface. Protection measures listed below
shall begin immediately after the concrete slab is poured:
1. All hydraulic powered equipment shall be diapered to
avoid staining of the concrete.
2. All vehicle parking shall be prohibited on the finish
slab area. If necessary to complete their scope of work,
drop cloths shall be placed under vehicles at all times.
3. No pipe cutting machine shall be used on the finish floor
slab.
4. Steel shall not be placed on the finish slab to avoid
rusting.
5. Acids and acidic detergents will not come in contact with
slab.
6. All painters will use drop cloths on the concrete. If
paint gets on the concrete, it must be immediately removed.
7. All trades will be informed that the slab must be
protected at all times.
I. Environmental Limitations
1. Comply with manufacturers written instructions for
substrate temperature and moisture content, ambient
temperature and humidity, ventilation and other conditions
affecting chemical performance.
2. Flatness and levelness
a. Finish Concrete shall have a minimum Floor Flatness
rating of at least 40.
b. Finish Concrete shall have a minimum Floor Levelness
rating of at least 30.
c. Finish Concrete shall be cured a minimum of 28 days or at
which point equipment can be put on the slab and does not
displace aggregate.
3. Application of finish system shall take place a minimum
of 21 days prior to fixture & trim installation and/or
substantial completion.
4. Finish Concrete area shall be closed to traffic during
finish floor application and after application, for the time
as recommended by manufacturer.
J. Concrete Mix Design:
1. Concrete Mixture shall be 3500 PSI or higher, non air
entrained.
a. Any admixtures, plasticizers, slag, fly ash or anything
taking the place of Portland-based cement shall be kept to a
minimum.
b. The cement shall be Portland Cement Type I, conforming to
ASTM C 150.
c. Maintain concrete temperature below 85 degrees. Keep
concrete as cool and moist for as long as possible. In
essence, decrease rate of hydration and drying to minimize
cracking.
d. Wet cures are most suitable, but if this cannot be
achieved, use a penetrating, dissipating or wax based cure
and seal. Do not use a densifier/Hardener material due to
the grinding of the floor after 6 days. All Cure and Seal
must be ground off. Chemical stripping is not an acceptable
method of removal.
e. All mix designs must be approved by Architect. Send all
approved mix designs to Applicator.
f. The Engineer/Architect shall determine the saw cut
patterns, color and layout.
g. Color loads for integral color should never be smaller
than 3 cubic yards.
h. Use on source for cement, aggregates and pozzolans
throughout the job. Monitor and control incoming material
consistency. Do not use calcium chloride-based admixtures.
Non-chloride admixtures may be used.
i. Wash out all drums before loading. Keep slumps consistent
with a maximum of 4. Minimize driver added water maintaining
a .45 water content ratio.
j. Place concrete to achieve as true and smooth a top
surface as possible. Mounds, or dips are not acceptable. GC
shall control overall flatness and levelness, including on
sloping areas to within tolerances permitted by
specification – ASTM E1155.
k. Slab shall be protected from indention and footprints
during pour and curing.
PART 2 PRODUCTS
2.1 POLISHING MATERIALS
A. Three-phase 480 Volt generator and step down transformer.
B. 2, 3 or 4 head counter rotating variable speed Hardscapes™
Approved Floor Grinder with at least 600 pounds down
pressure. For example: HTC 2500IX, HTC 950RX or HTC 800 HD,
STI Prepmaster 3030, King PG820, Powerstar Mongrel.
C. Hardscapes™ approved dust extraction system,
pre-separator, and squeegee attachments with minimum flow
rating of 322 cubic feet per minute.
D. Grinding Heads:
1. Hardscapes™ Metal bonded 16, 25, 40, 80, 150 and/or 300
grits.
2. Hardscapes™ Resin bonded diamonds, 100, 200, 400, 800,
1500 and
3000 grits.
E. Grinding Pads for Edges
1. 40, 60, and 120 grits.
2. 100, 200,400, 800, 1500 and 3000 grits.
F. Hand Grinder with dust extraction attachment and pads.
G. SherCrete Dust and Salt Protectant™ No Substitutions
H. Control Joint and Saw Cut Filler, two part filler or
polyurea as specified by construction manager.
I. Pastecoat™, or Tileclad™ floor striping material and
layout to specification by owner/architect.
J. Ameripolish™, penetrating, dye or H&C™ reactive acid
stain that chemically combines with cured concrete to
produce permanent, variegated or translucent color effects
or a hydrolyzed, lithium quartz or silicate compound, that
works by penetrating and reacting with mineral compounds
and/or siliceous materials to create a translucent or
marbled color effects.
PART 3 EXECUTION
3.1 PREPARATION
A. Installer shall examine and approve concrete substrate
for conditions affecting performance of finish. General
Contractor shall correct conditions that are found to be out
of compliance with the requirements of this section. Repairs
are not acceptable unless specifically approved on a
case-by-case basis by the Architect.
B. Verify that base slab meet finish and surface profile
requirements listed in Division 3, Section “Cast in Place
Concrete”.
C. Provide floor clean of materials and debris.
D. Protect adjacent surfaces as required to prevent damage
by the concrete polishing procedure.
E. Setup grinding machine, dust extraction system, tooling,
and generator.
F. Ensure floor cured to accept polishing application.
3.2 POLISHED CONCRETE APPLICATION
A. Applicator shall examine the areas and conditions under
which work of this section will be provided and the General
Contractor shall correct conditions detrimental to the
timely and proper completion of the work and the Applicator
shall not proceed until unsatisfactory conditions are
resolved.
B. Grind the concrete floor to within 2 -3 inches of walls
with 16, 25, 40 and 80 grit removing construction debris,
floor slab imperfections and until there is a uniform
scratch pattern and desired concrete aggregate exposure is
achieved. Vacuum the floor thoroughly using a squeegee
vacuum attachment.
C. Apply material approved by architect for color effects in
accordance with the architectural drawings and the
manufacturers recommended guidelines.
D. Fill construction joints and cracks with filler products
as specified in accordance with manufacturers instructions
colored to match (or contrast) with concrete color as
specified by architect.
E. (If specified) Bull float cementations grout coat onto
surface to fill all voids, cement grout to match (or
contrast) color of concrete, allow to cure overnight. (If
specified) Apply epoxy grout coat onto surface; allow curing
overnight, as specified by architect or construction
manager.
F. Grind the floor to within 2 - 3 inches of walls with
metal bonded diamond grits of 150 and/or 300, grinding 90
degrees from each previous grind and removing all the
scratches from the previous grit. Vacuum the floor
thoroughly after each grind, using a squeegee vacuum
attachment.
G. (If specified) Grind the edges with 40, 60 and 120 grit
grinding pads, removing all of the scratches from the
previous grit. Vacuum the floor thoroughly after each grind,
using a squeegee vacuum attachment.
H. Polish the floor, to desired sheen level, with Hardscapes
™ resin bonded diamond grits of 100, and 200. After each
polish, clean the floor thoroughly using clean water and an
auto scrubber or a mop and a wet vacuum. Apply SherCrete
Dust and Salt Protectant™ undiluted at approximately 400-600
square feet per gallon using a soft, long bristled broom.
Cover the entire work area liberally and allow to sit for 10
minutes. Apply again to areas where the densifying
impregnator has soaked in and allow to sit for an additional
20 minutes. Allow material to dry. Do not remove any of the
SherCrete Dust and Salt Protectant™ from the floor. As the
floor dries spread any puddles. (If staining the floor with
either an Ameripolish Dye Stain or an H&C acid stain, grind
through the 400 before applying the colorant and the
SherCrete Dust and Salt Protectant™). After the floor has
dried completely finish polishing using the next grit in the
sequence of 400, 800, 1500 and 3000, first polishing the
edges (If specified) with pads of the same grit and then the
field of the floor, removing all scratches from the previous
grit.
I. Apply Sherwin Williams SherGuard™ per the manufacture’s
recommended application procedures, buff with Black
Thickline Strip Pad.
J. Upon completion, the work shall be ready for final
inspection and acceptance by the customer.
3.3 PROTECTION
A. Protect the floors from damage until substantial
completion.
PART 4 SCHEDULES
4.1 SHEEN
A. Polished Concrete Level 1:
1. At a distance of 100 feet, the floor will reflect images
from side lighting.
B. Polished Concrete Level 2:
1. At a distance of 30 to 50 feet, the floor will clearly
reflect from side and overhead lighting.
C. Polished Concrete Level 3:
1. Looking straight down, the floor will clearly reflect
overhead and side light, with the appearance of the floor
looking wet.
4.2 EXPOSED AGGREGATE
A. Exposure rate per Architect/Owner selection.
4.3 EDGES
A. Painted
B. Honed
C. Polished
D. Graphic
E. Other
4.4 TRANSITIONS
A. Inside
B. Outside
C. Center
D. Other
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