RAECO SLU
SELF LEVELING UNDERLAYMENT
(Change to meet requirements) SECTION 03550-1
CEMENTITIOUS FLOOR UNDERLAYMENT
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Work includes but not limited to the following:
1. Polymer modified cementitious self leveling underlayment.
1.02 RELATED SECTIONS
A. Coordinate related work specified in other areas of the Project Manual, including but
not limited to the following:
Section 03300 - Cast-In-Place Concrete
Section 09650 - Resilient Tile Flooring
Section 09680 - Carpet
1.03 REFERENCES
A. Comply with the requirements of Section 01091 and as listed herein. See Section
01091 for listed association, council, institute, society, and the like organization for its
full name and address.
ASTM C-109 Test Method for Compressive Strength of Hydraulic Cement
Mortars. (Using 2 inch or 50 mm Cube Specimens)
ASTM C-190 Test Method for Tensile Strength of Hydraulic Cement Mortars.
ASTM C-256 Test Method for Flexural Strength of Hydraulic Cement Mortars.
1.04 SYSTEM DESCRIPTION
A. Portland Cement-based, self leveling polymer modified underlayment to bring
concrete slab substrates into tolerance and where unsuitable, to receive new floor
finishes.
1.05 PERFORMANCE REQUIREMENTS
A. Resistant to indentation, tightly bonding, non-injurious adhesives and floor finishes.
1.06 SUBMITTALS
A. Submittals in accordance with Sections 01300 and the following:
1. Product Data: Provide completely definitive brochures including
specifications, current product literature and other data to prove compliance
with specified requirements.
2. Manufacturer’s certification that product is cement based having a cement
binder content which is a minimum of 80% of total binder as per ASTM C-114.
3. Manufacturer’s certification that product specified is suitable for intended use
when installed per manufacturer’s literature and installation instructions.
1.07 QUALITY ASSURANCE
A. Applicator Qualifications: Applicator of concrete floor resurfacing shall be approved by
manufacturer.
B. Regulatory Requirements: See referenced Codes, Ordinances Section 01060
SECTION 03550-2
CEMENTITIOUS FLOOR UNDERLAYMENT
C. Test Areas: At an area on-site, where approved by Engineer, provide a test
installation as follows:
1. Size of area shall be 4’x 4’.
2. Test area shall be installed using procedures and under conditions which
will reflect actual jobsite conditions.
3. Test shall be placed and evaluated for a period of 4 days prior to approval
by the Engineer.
4. Approval shall deem the test area as the standard by which the remainder of
the project shall be compared for the acceptance or rejection.
1.08 DELIVERY, STORAGE AND HANDLING
A. In accordance with provisions of Section 01600 and the following: Materials shall be
delivered in its original unopened container and protected from contamination,
damage or deterioration as per manufacturer’s instructions. All damaged products
shall be removed from project and discarded as per local requirements.
1.09 PROJECT SITE CONDITIONS
A. Environmental Conditions:
1. Maintain enclosed building at minimum of 50 degrees F. before, during and
after installation. Provide continuous ventilation and adequate heat to remove
moisture until product has adequately cured.
1.10 SCHEDULING / SEQUENCING
A. Coordinate with Engineer’s approved Progress Schedule, Section 01310
PART 2 PRODUCTS
2.01 MANUFACTURER
A. Raeco, Inc. Seattle, Washington Tel. (206) 763-1335 Fax (206) 768-0175 is
specified for type, material and quantity required.
2.02 MATERIALS
A. Raeco SLU, Self Leveling Underlayment in pre-blended sacks.
B. Raeco-Bond Primer or Raeco R-2000, Bonding Agent.
C. Clean Potable Water
D. Appropriate Aggregate for thickness’ exceeding ½”. Refer to Product Data Sheet
for type and size.
SECTION 03550-3
CEMENTITIOUS FLOOR UNDERLAYMENT
E. Technical Data:
1. Self leveling polymer modified concrete underlayment that contains no
gypsum, chlorides, ferrous metals or corrosive agents.
2. Compressive Strength, 4650 psi @ 28 days, ASTM C-1439
Tensile Strength, 520 psi @ 28 days, ASTM C-190
Flexural Strength, 1035 psi @ 28 days, ASTM C-256
Shear Bond Strength, 500 psi @ 28 days
Flammability, ASTM E84
a. Flame Spread 0
b. Fuel Contribution 0
c. Smoke Development 0
3. Flow Time: 20 min. @ 70° F.
Initial Set: 45 min. @ 70° F.
Final Set: 2-3 hrs. @ 70° F.
4. Coverage: 50 sq.ft. per sack @ 1/8”
2.03 MIXING PROPORTIONS
A. Mix proportions and methods shall be in accordance with product manufacturer
recommendations.
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify installation conditions as satisfactory to receive work of this Section. Do not
install until unsatisfactory conditions are corrected. Beginning work will constitute your
acceptance of conditions as satisfactory.
3.02 PREPARATION
A. Condition and Cleaning of Subfloor: Subfloor shall be structurally sound, shot blast,
and contaminant free.
B. Cracks in subfloor shall be repaired prior to installation of the underlayment to prevent
telegraphing through the underlayment.
C. Expansion Joints: Allow joints to continue through the concrete resurfacing material
at same width.
3.03 APPLICATION
A. Primer: Prime subfloor with specified compound. Priming instruction may vary
according to type of substrate, multiple coats may be necessary.
B. Mix and apply in accordance with manufacturer’s written directions.
1. Thickness: As required to meet construction conditions. Pour or pump
in place to meet tolerances setforth.
2. Drying: Provide continuous ventilation and adequate heating to removing
moisture from the area until dry. Test for dryness in accordance with
manufacturer’s directions.
SECTION 03550-4
CEMENTITIOUS FLOOR UNDERLAYMENT
3.04 TOLERANCES
A. Finished surface tolerances shall be 1/8” using a 10’ straight edge, measuring in
any direction.
3.05 PROTECTION
A. Protect from heavy loads during construction, place temporary cover to area by
means to protect from contamination and damage.
END OF SECTION