EPOXY
GROUT :-
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GENERAL:
The Installation and fixing of heavy machinery like
large pumps, generators, lathes, compressors, drilling &
milling machines, textile looms & machinery,
crane, bowl mills etc. requires the leveling of bearing
or base plates on concrete foundation. The space
between the concrete foundation & bearing/base plate
is filled with cement mortar or steel shims. Which is a
time consuming and cumbersome job.
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Cement mortar
filling has few disadvantages:
1) Longer setting & curing time.
2) Not resistant to oils, fuels and other chemicals.
3) Cracking due to vibration & high loading, i.e.
poor physical properties
4)High shrinkage on curing.
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Epoxy grouting
system eliminates all above problems, and give excellent
properties like:
1)
Fast setting & curing time
2) Resistant to oils, grease, fuels and corrosive
industrial chemicals.
3) Very low shrinkage resulting in good dimension
stability.
4) High early mechanical strength
5) Excellent adhesion to concrete & metal surface
6) Excellent vibration absorbing properties
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APPLICATION:
To get highest bond strength, apply one primer coat of
unfilled resin & curing agent in recommended mix
ratio is to be applied on both concrete & steel surface.
Allow it to touch dry stage.
Then grouting the mix care should be taken to avoid
any air pockets. Tamping with rods or vibrator is
recommended, as a suitable measure.
Since the curing of resin is an exothermic reaction,
few precautions should be taken to avoid high heat
build-up and consequent stress in the cured resin
system.
1). For filling shallow spaces upto 50mm depth,
entire job can be complete in one layer application
without any problem, unless the ambient temp. is not
more then 40o C
2). Filling deeper pockets, we recommend in layers,
each layer not more then about 100mm at a time. This
is particularly necessary at high summer temperatures
exceeding 40o C
The rate of curing is purely depending on ambient
temperature. More then 50% of the strength are
reached with 24 hours, 90% in 72 hours and full cure
in 7 days at ambient temperature of 25-30 C.
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PHYSICAL
PROPERTIES:
| Specific gravity |
2.2 |
| Compressive Strength (kg/cm2) |
950-1200 |
| Flexural Strength (kg/cm2) |
450-550 |
| Tensile shear Strength (kg/cm2) |
100 |
Mortar formulation performs well even under dynamic
loads. When exposed to sever pulsating loads, no
failure took place even after 2,00,000 cycles.
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EPOXY GROUTING
SYSTEM
The most suitable grouting system consists of
the following components:
EPOXY GROUT Specially formulated epoxy resin
100 PBW
EPOXY GROUT Very special curing agent
55 PBW
EPOXY GROUT Graded & varied filler components
400-500 PBW
NOTE: The amount & particle size of filler
component to be use in the mixing should be decided
depending on the consistency suitable for specific job.
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METHOD
OF APPLICATION:
SURFACE PREPARATION
To get good result, it is necessary that both the
concrete & steel surface should be clean and free from
any oil, grease. The foundation bolt/base plate should
be prepared thoroughly wire-brushing or roughening
with emery paper. Degreasing with a solvent like
acetone, benzene or toluene is then recommended.
Please see technical data sheet on surface standards
for more information.
NOTE: The amount & particle size of filler
component to be use in the mixing should be decided
depending on the consistency suitable for specific job.
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MIXING:
The resin, curing agent and filler components are
weighed perfectly in the correct ratio. Then mix it
manually or by mechanical mixer to obtain a uniform
color mix of all the above components. It is
recommended to let the mixed material stand free for
few minutes to release entrapped air.
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CLEANING OF
EQUIPMENT:
Once the resin & curing agent sets hard, it is very
difficult to remove. Before it sets, it should be scraped
off from the tools, mixing pan etc. One can use
solvent like toluene, xylene or acetone. |
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STORAGE & HANDLING:
The resin and curing agent should be stored on its
original, closely tight container, away from direct
sunlight, heat & humidity. This will give minimum
one-year shelf life. Filler component also should be
kept in closed bag, away from heat & water.
Avoid direct contact with skin & eye. It is advisable
to
wash of resin & curing agent if comes in contact with
skin/eye and consult a doctor.
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