Do-It-Yourself Concrete Overlayment Technical Information and How to by Monster Constructors


Self Leveling Concrete Overlayment
Technical Bulletin

Purchase Concrete Overlayment  at Monster Constructors Store

DESCRIPTION: Concrete self leveling material is a quick-setting, self drying
material. It is specifically formulated for use as a resurfacing material for interior,
horizontal floors. The design intent application of the product is for light – traffic
industrial or commercial wear topping.


Surface Preparation:

1.  All substrates must be structurally sound

2.  Clean the surface free from any material that could interfere with the adhesion of
the applied material including but not limited to, dirt, paint, tar, asphalt, wax, oil,
grease, latex compounds, sealers, curing compounds, form release agents,
efflorescence, foreign substances, and adhesive residue.

3.  Concrete surfaces must be must be mechanically profiled and prepared by shotblasting,
sandblasting, water-jetting, scarifying, diamond- grinding or another
approved method as recognized by ICRI (International Concrete Re-Surfacing
Institute as it applies to the standards of acceptable profile height.

4.  Substrate hydrostatic pressure conditions and vapor transmissions must not
exceed 3 lbs. per 1000 square feet per 24 hours. Use a calcium chloride test
(ASTM F1869) prior to application.

5.  Use a calcium carbide test to ensure that the retained moisture content of the
substrate is less than 2.5%

6.  Concrete substrate and ambient temperatures must be a minimum of 50 degrees F,
and not exceed 95 degrees F. Temperatures must be maintained in this range for a
minimum of 72 hours.

7.  Fill in deep areas, holes or cracks with an appropriate concrete restoration
product, particularly when installing material on a second floor or above where
fluid material could leak on the floor below.

8.  Always prime the substrate with Concrete Primer prior to the application
of Concrete Self-Leveling Overlayment.

9.  Avoid priming over standing water.

10.  Allow primer to completely dry before installation of self leveling material.

11.  Check for porosity of the substrate so that adequate penetration of the primer can
be achieved. Porous concrete may require more than one coat primer to provide
proper bonding.

12.  After the surface preparation of the substrate has been completed, allow 48 hours
for out-gassing to occur before application of the primer.

13.  To install over properly prepared ceramic tile, VAT,VCT, cement or epoxy
terrazzo, or thin layers of old cutback adhesive residue, surfaces must be properly
prepared, bonded, free from dirt, and dust and primed.

14.  To install over steel decking or metal, the requirements of the L/360 deflection
must be met. Prime the surface at a 20 wet-mil thickness with Concrete
epoxy primer. Apply Concrete Self Leveling material to the Epoxy primer
while product is still tacky to ensure proper bonding.

Mixing:

General Mixing:

Using a clean mixing container, pour the required amount of clean, cool potable water. If
cool water is not available, chill down the water to 70 degrees ambient temperature. Add
Concrete Self Leveling material to 5.75 – 6 quarts of water per 50 lbs. of material
slowly while mixing continuously. The mixing ratio must remain consistent. Do Not
over-water material.

Barrel Mixing:
Using the appropriate mixing ratio above, mix using a low speed mixer (approx. 1200
rpm) with an “Egg Beater” mixing paddle. Mix to a homogenous, lump free consistency,
approximately 3 minutes. Do Not over-mix. Over-mixing or moving the mixer up and
down during the mixing process could cause air entrapment, which could shorten the pot
life of the material or cause pin holing in the material as it cures.

Pump Mixing:
Concrete Self Leveling Overlayment can be mechanically mixed, using the
appropriate mixing ratio above with a Continuous Mixer and Pump, a minimum of 140
lineal feet of hose or a Batch Mixer and Pump, with a minimum of 110 lineal feet of
hose. Mixer and pump must be in good working condition. Be sure to pressure test the
rotor and stator for proper mixing. Be sure to use a mesh sock at the end of the hose so
that foreign material will not migrate to the hopper.

Application Procedures:

1. Before application, close all doors, windows, to prevent drafts, protect all areas
from direct sunlight.

2. Make sure that ambient temperatures are at least 50 degrees F. Temperatures must
remain consistent in this range after the application. For applications in
temperatures above 85 degrees F, comply with ACI Hot Weather application for a
successful installation.

3. For the best results, work as a team to provide a continuous flow of wet material
to avoid trapping air or creating a cold joint.

4. Set the width of the pour at a distance that is ideal for maintaining a wet edge
throughout placement. Quickly pour or pump onto the properly prepared and
primed surface in a ribbon pattern. If a wet edge cannot be maintained, reduce the
size of the pour.

5. Concrete Self Leveling Overlayment has an appropriate flow time of
approx. 15 minutes at 73 degrees F is self leveling and can be applied from
featheredge. For vehicular traffic to rubber wheel traffic, product can be applied
from ½ “ to 2” in a single application. Please be aware that temperatures and
humidity can and will affect the working time, flow ability, and set time. Apply
enough material to adequately cover all high spots.

6. Immediately after placing material, spread the product with a gauge rake to the
desired depth, followed by a smoother to obtain an even surface. Do not overwork
the material as it will cause a risk of air entrapment.

7. Concrete Self Leveling Overlayment hardens within 2 to 3 hours, and is
ready to accept stains, sealers, or other coatings in as little as 24 hours. The
material is also ready to accept ceramic tile and natural stone in 3 to 4 hours. If
the self leveling overlayment is not going to be the wearing surface, protect the
surface from contaminants until final flooring installation is complete.

Curing:

1. Concrete Self Leveling Overlayment is a self curing product; do not use a
damp curing method or curing and sealing compounds.

2. Protect from excessive heat or draft conditions during curing. Turn off all forced
ventilation and radiant heating systems, and protect for up to 24 hours after
completion.

3. Avoid walking on installed surface for at least 2 to 3 hours after installation,
depending upon temperature and humidity conditions.

4. Protect from traffic, dirt and dust from other trades until the final floor sealer or
coating has been installed and completely cured.

5. Do not expose the self leveling material to rolling dynamic loads such as fork lift
or scissor lift traffic for a minimum of 48 hours after installation.

Cleaning:

Wash tools and hands with water promptly before material hardens. Cured material must
be mechanically removed.

Technical Data
Physical State ………………………………………..Powder
Color………………………………………………….Gray or White
Shelf Life……………………………………………..6 months in dry place
Flammability………………………………………….Flame spread: 0
Fuel Contribution: 0
Smoke Development: 0
Compressive Strength (ASTM C-109) PSI
1 Day………………………………………………… 2150
7 Days……………………………………………….. 3300
28 Days……………………………………………….5000
Flexural Strength (ASTM C-348)
1 Day………………………………………………….550
7 Days………………………………………………...1145
28 Days……………………………………………….1400
Abrasion Resistance (ASTM D-460)
Taber H22-500g, 200 cycles
After 28 Days…………………………………………0.20 Grams of loss
Volume change………………………………………..-0.05% (28 days)
Approximate Coverage’s per thickness /50lb.bag
1/8”...………………………………………………………………………………..48 sq. ft.
¼”……………………………………………………...24 sq. ft.
½”……………………………………………………...12 sq. ft.

Purchase Concrete Overlayment at Monster Constructors Store

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Phone: 817-847-9177  Fax: 817-847-6522

                

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