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DESCRIPTION
XYPEX MEGAMIX I is a thin parge coat for the waterproofing and resurfacing
of vertical masonry or concrete surfaces, as a cap coat for Xypex
Concentrate, or as an architectural rendering. Megamix I is a unique blend
of portland cement, treated silica sand, fibers and proprietary chemicals.
It is mixed with Xycrylic Admix to produce enhanced bond. Megamix I is
applied by brush or trowel up to a thickness of 3/8" (10 mm). The
high performance characteristic of Megamix I are enhanced by Xypex's
unique crystalline waterproofing and protection technology.
Note: For patching or resurfacing deteriorated concrete, requiring
a thicker parge coat, (between 3/8" and 2" or 10 mm to 50 mm),
refer to the section below on Xypex Megamix II.
| RECOMMENDED FOR: |
- Waterproof coating for vertical concrete block surfaces
and cast-in-place concrete walls
- A secondary or cap coat for Xypex Concentrate
applications to porous masonry surfaces
- Lining for swimming pools, tunnels and tanks
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| ADVANTAGES |
- Excellent adhesion and bond to concrete substrates
- Easy to apply
- Fiber reinforced
- Reduces surface absorption
- Provides good surface for painting or as a final
finished surface
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Xypex Megamix is an ideal solution
for these weather damaged portions
of the I-70 highway |
PACKAGING
Megamix I is available in 60 lb. (27.2 kg) pails.
STORAGE
Xypex products must be stored dry at a minimum temperature of 45°F
(7°C). Shelf life is 1 year.
COVERAGE
Required coating thickness will vary depending on project requirements. At
the recommended thickness of 1/8" (3.2 mm), one 60 lb. (27.2 kg) pail
of Megamix I will cover 47.5 sq. ft. (4.4 m2). Megamix I may be applied as
thin as 1/16" (1.6 mm) provided it is used as a cap coat over a coat
of Xypex Concentrate. For application thickness exceeding 3/8" (10
mm), consult the Technical Department of Xypex Chemical Corporation or
your local Xypex representative.
PHYSICAL PROPERTIES
| Mixing Liquid Required
(2 water: 1 part Xycrylic) |
| |
1.4 US gall 60 Ib. pail
5.41/27.2 kg pail |
| Compressive Strength
(ASTM Cl09) |
@ 7 days psi
(MPa)
@ 28 days |
2420
3610 |
(16.7)
(24.9) |
Direct Tensile Bond
Strength
(ACI 503R Appendix A) |
concrete block psi
(MPa)
24 hr Concentrate |
220
180 |
(1.54)
(1.24) |
Water Permeability and
Absorption
CSN 73 2578 "Test for Water-tightness
of Surface Finishes of Building Materials" |
30 min water absorption
(% of untreated concrete block) |
86.8% reduction |
Note: For bond and absorption tests, Megamix I was applied at
1/16" 0.6 mm) thick onto either pressure washed concrete block or 24
hr old Xypex Concentrate.
| APPLICATION PROCEDURES |
- SURFACE PREPARATION. The concrete surface to be treated
with Megmix I must be clean and free from dirt, oil, paint, or
other foreign substances that could hinder bond. Structural
repairs (i.e. cracks, faulty construction joints, rock pockets,
tie holes, spalled concrete, etc.) should be performed prior to
the application of the Megamix 1 coating. Pressure washing of
surface may be required to ensure open capillary system to
provide "tooth and suction" for the Megamix 1 coating.
- WETTING CONCRETE SURFACE. The concrete or masonry
surface must be thoroughly saturated with clean water to control
substrate suction and prevent premature drying out of the
Megamix 1 coating.
- MIXING PROCEDURES. Prepare the mixing liquid by
combining 1 part Xycrylic Admix with 2. parts clean water. Then,
mix 1.4 US gals (5.41) of the mixing liquid with one 60 lb.
(27.2 kg) pail of Megamix 1 powder. Mix thoroughly to a creamy
consistency that is suitable for either a brush or trowel
application. Let mixture stand for 3-5 minutes, re-agitate and
then apply.
- APPLYING MEGAMIX I. Ensure surface is saturatedsurface-damp
just prior to application. Brush or trowel apply Megamix 1 to
the surface at the rate of 0.6 to 1.3 Ib./sq. ft. (2.9 to 6.4
kglm2). This coverage rate will produce a coating of between
1/16" and liS" (1.6 mm to 3.2 mm) thick depending on
the porosity of the substrate.
For spray applicaton contact the Technical Department of Xypex
Chemical Corporation or your local Xypex representative for
specific details.
For applications such as concrete block walls where Xypex
Concentrate is to be used as the initial coat in a two-coat
system, the Concentrate coating should be installed as per the
manufacturer's standard instructions. Megamix 1 should then be
applied over the Concentrate coating while the Concentrate is
still "green" (i.e. following initial set /
approximately 2-4 hours). The Megamix 1 coating should not be
applied later than 24 hours after the application of Xypex
Concentrate.
- CURING. When used with Xycrylic Admix as specified
above, Megamix 1 should not require any further curing.
However, if weather conditions result in rapid evaporation (such
as very hot, or windy), then a fine mist of water should be
sprayed on the coating 2-3 times for one day.
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DESCRIPTION
XYPEX MEGAMIX II is a thick repair mortar for the patching and resurfacing
of deteriorated concrete. Megamix II has been specifically formulated to
prod~ce superior bond, low shrinkage, chemical durability and high
strength. It is a one component mortar and can be either sprayed or trowel
applied at a thickness of 3/8" to 2" (10 mm to 50 mm). The high
performance characteristics of Megamix II are enhanced by Xypex's unique
crystalline waterproofing and protection technology.
Note: For rehabilitation applications, where a thin parge coating
(less than 3/8" or 10 mm) or a cap coat for Xypex Concentrate is
required, refer to the product data sheet for Megamix 1.
| RECOMMENDED FOR: |
- Water tanks and reservoirs
- Sewage treatment plants
- Concrete water and sewer pipes
- Manholes and vaults
- Marine structures
- Bridge structures
- Tunnels and parking garages
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| ADVANTAGES |
- Excellent adhesion and bond to concrete substrates
- Low shrinkage, fiber reinforced
- Low chloride penetration
- Ready to use - just add water
- Vertical and overhead concrete repair; sprayable
- VOC Compliant
- NSF 61 approved
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PACKAGING
Megamix II is available in 55lb. (25 kg) bags, 60 lb. (27.2 kg) pails, or
in customized packaging to meet your specific requirements.
STORAGE
Xypex products must be stored dry at a minimum temperature of 45°F
(7°C). Shelf life is 1 year.
COVERAGE
At 1/2 in. (12.5 mm) thickness, each 55 lb. (25 kg) bag of Megamix II will
cover 11.3 sq.ft. (1.05 m'), or each 60 lb. (27.2 kg) pail will cover 12.3
sq.ft. (1.14 m').
PHYSICAL PROPERTIES
| Water Requirement |
| |
0.9 US gal/55 lb. bag or 1.0 US gal/60 Ib.
pail
3.5 1/25 kg bag or 3.8 1/27.2 kg pail |
| Compressive Strength
(ASTM Cl09) |
@ 24 hrs psi
(MPa)
@ 3 days
@ 7 days
@ 28 days |
3080
5515
6845
8600 |
(21.2)
(38.0)
(47.2)
(59.3) |
| Flexural Strength (AStM
C78) |
| @ 28 days psi
(MPa) |
1190 |
(8.2) |
| Splitting Tensile
Strength (ASTM C496) |
| @ 28 days psi
(MPa) |
603 |
(4.2) |
| Direct Tensile Bond
Strength to Concrete (ACI 503R Appendix A) |
| @ 90 days psi
(MPa) |
330 |
(2.3) |
| Rapid Chloride
Permeability (ASTM 1202) |
@ 28 days (coulombs)
@ 90 days |
572
420 |
| Scaling Resistance
(ASTM 672) |
| 50 cycles |
no scaling |
| Setting Time (ASTM
C266) |
initial (hrs:min)
final |
4:10
7:10 |
| APPLICATION PROCEDURES |
- SURFACE PREPARATION. Remove loose, delaminated or
unsound concrete by high pressure water blast, chipping, or
other means. Complete structural or reinforcing steel corrosion
repairs as necessary. Saw cut perimeter of repair area to
3/8" (10 mm) depth. Remove dust, micro fractured particles
and foreign material from the repair area by pressure washing or
other suitable means necessary to clean surface and obtain
desired bond.
- MIXING PROCEDURES. Best results are achieved using a
mechanical mortar mixer and paddle with a capacity for low speed
continuous blending. For small quantities of material a paddle
mixer can be substituted. Mix requires 0.9 US gallons (3.5
litres) of clean water per 55 lb. (25 kg) bag of Megamix II or
1.0 US gallon (3.8 1) of clean water per 60 lb. (27.2 kg) pail.
Add approximately 90% of the required amount of water to a mixer
and then add the Megamix II powder. Mix briefly and add
additional water as required up to a maximum of 0.9 US gallons
(3.5 litres) per 55 lb. (25 kg) bag of Megamix II or 1.0 US
gallon (3.8 1) of clean water per 60 lb. (27.2 kg) pail. Mix 3
to 5 minutes to achieve a uniform consistency Over-mixing or
delivery delays may result in product stiffening. Do not
over-water.
- APPLYING MEGAMIX II. Saturate the repair area with
clean water and allow the surface to come to a "saturated,
surface dry" (SSD) condition. Maintain concrete substrate
in this condition during the application process. For improved
bond, apply scrub coat of Megamix II onto prepared surface using
a stiff bristle brush. Apply full coat of Megamix II while scrub
coat is still wet (generally within 20 minutes). Apply Megamix
II by low pressure spray equipment with sufficient velocity to
compact and build thickness of the mortar. The spray nozzle
should have a minimum 0.5" (12.5 mm) orifice to prevent
clogging. Spray-apply Megamix II, at a right angle to surface,
at a distance of 18 to 24 inches (450 mm to 600 mm). Complete
finishing operations as quickly as possible. Megamix II can be
finished to varying surface textures, including a rough finish
directly from spraying nozzle, to semi-smooth using a wood or
rubber float or smooth using a steel trowel.
- For a recommendation regarding the specific type of
equipment required for the mixing and for the spray
application of Megamix II, please contact the Technical
Services Department of Xypex Chemical Corporation.
- An application of Xypex Concentrate may be specified by an
engineer or design authority to provide enhanced
waterproofing and chemical protection in extremely harsh
conditions.
- Xypex Concentrate should be applied onto the Megamix II
surface immediately following moist curing (i.e. 3 days).
Ensure that the Megamix surface is rough or scored and
saturated to provide tooth and suction for the Xypex
coating.
- APPLICATION THICKNESS. The thickness of the Megamix II
application will depend on specific job site conditions and
requirements. As a general guide, application thickness should
be between 3/8" and 2" (10 mm and 50 mm). Single layer
thickness for spray application will depend on equipment and
applicator skill, but may be up to 2" (50 mm) vertical and
1.5" (40 mm) overhead. Roughen or score the surface before
applying successive layers and apply immediately following
initial set.
Note: For any application greater than 2" (50 mm)
contact the Technical Services Department of Xypex Chemical
Corporation or your local Xypex representative.
- CURING. Curing is essential for optimum quality and
durability of the repair mortar. Cure Megamix II using either
ASTM C 309 compliant curing compounds or by moist curing
methods. For moist curing, apply continuous source of moisture
by spray; or wet burlap and polyethylene sheet or other suitable
means for a minimum of 3 days. Containment structures (i.e.
reservoirs, tanks, etc.) can be filled with water following 3
days moist curing of the Megamix II coating.
- In hot, dry; windy weather, special curing procedures may
be required prior to final set. This may involve use of fog
spray; or suitable curing compounds following finishing.
- Megamix II should not be mixed and placed at temperatures
below 38°F (3°C) or above 86°F (30°C). Protect from
rapid evaporation (hot and/or cold and windy conditions).
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