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Speciality of
material
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 ＊more
about products＊ |
| Strengthening
of carbon fiber which was created by the US and Japan
is applicable for civil engineering recently. It is well
applicable for strengthening of columns. Strength of encirclement
which is caused by viscidity will strengthen toughness
of columns to reinforce the ability earthquake-resistant
and compress-resistant. |
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| Speciality: |
| 1.High
performance |
| Strength of carbon
fiber is always higher than of steel. Even strength of
some is quadruple of strength of steel. |
| 2.To
reinforce the toughness of section |
| Carbon fiber is
high-strength material. It is fit for current standard
of earthquake-resistant because of its high strength of
encirclement which will reinforce toughness of construction
when it is applied to strengthen column. |
| 3.
Light weight |
| Carbon fiber is
lighter than aluminium. Earthquake force caused by carbon
fiber is enough low for its light weight. So, carbon fiber
is a very good material for reinforcement. |
| 4.Not
to change the shape of column before |
| Carbon fiber doesn’t
change the shape of column before when they are reinforced,
even the shape of square, rectangle, hexagon and others. |
| 5.
To hardly be influenced by space |
| Carbon fiber work
well in small space even only 10cm-high space |
| 6.Good
permanence and corrosive resistant |
| Carbon fiber have
good resistance capability to salt, soil and corrosive
condition. |
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How to use
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| Step
by step: |
| 1.Surface
treatment |
- To abrade the surface of concrete structure and
do milling with grinding wheel machine, and clear
out sand caused by weathering, dissociative lime,
mould separating reagent, cement separated, part brushed
and dunghill etc.
- To clear out powder and loose block on the surface
with injector without air pressure, grinding wheel
machine and brush. To make it dry enough after washed
with water.
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| 2.Repair
of section |
- To clear out the surface of concrete structure (desquamation,
hole, honeycomb, corrosive parts etc.). To make rust
protection treatment if there are any rebar exposed,
then, to repair them with epoxy-resin slurry and other
whose strength are equal to strength of concrete or
higher.
- Those cracks are injected with epoxy resin.
- To make water stopping treatment if those cracks
leak.
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| 3.To
make surface flat |
- To cut away plumpness of surface with cutter or
grinding wheel machine, and fill up the sunken with
epoxy resin or resin-slurry.
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To treat plump corners (r>=mm),
and fill up corners sunken.
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| 4.Brushing
with primer |
Don't operate when
rain or dew possibly or temperature below 5℃. To use appropriate
epoxy resin after temperature and humidity are confirmed.
- To mix round reagent and hardener appropriate with
portable auto-blender in the pail, and make them well-proportionable.
To mix them appropriately, and don’t use it if it
is overtime (according to the introduction of products).
- To brush uniformly with brush wheel, and brush again
according to spot condition (after surface curing
time). Amount of use varies with the direction of
operation and the coarseness of surface.
- Harding time is about 3~12h by touch with fingers.
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| 5.To
affix with unilateral carbon fiber |
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Don't operate when rain or dew possibly
or temperature below 5℃. To use appropriate epoxy resin
after temperature and humidity are confirmed.
- CFRP patch is cut into parts in the light of design
previous. The length of 2m or below is appropriate.
Amount of use is in terms of requirement for good
storage.
- Harding time is ensure by touch with fingers. When
primer has been made over a week, brush the surface
of operation flatly with cement.
- To mix round reagent and hardener appropriate with
portable auto-blender in the pail, and make them well-proportionable.
To mix them appropriately, and don’t use what is overtime
(according to the introduction of products).
- To brush uniformly epoxy resin on the surface of
primer with brush wheel. Amount of use varies with
the direction of operation and the coarseness of surface.
TO use heavy at the corners.
- After affix unilateral CFRP patch on the surface
of epoxy resin, tear down the protection paper. Then,
mop the surface of patch twice and thrice along the
direction of unilateral CFRP patch with brush wheel
and rubber knife to make patch permeant and avoid
air bladder.
- To mop flatly with wheel and rubber knife in 30min,
if CFRP thread plump or rupture.
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To brush resin on the surface of
CFRP patch (the means is similar to means e), to
mop along the direction of unilateral fiber with
brush and rubber knife to make patch permeant well.
- To repeat means d~g when affix patch twice or more.
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| 6.Maintaining |
When work out of
door, use plastic film to protect from rain, sand, dust
etc.
- After operation of unilateral CFRP patch is finished
and CFRP patch feel dry with fingers, cover it with
plastic film which can't touch the surface of operation.
- To cover it over 24h.
- When average temperature is 10℃, maintaining time
is not less than two weeks. When average temperature
is 20℃, maintaining time is not less than one week.
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| 7.Protection
of surface |
- CFRP itself has the function what can prevent ultraviolet
radiation to avoid resin damaged. When surface of
operation is irradiated, it is appropriate to spread
perdurable dope and resin slurry.
- To spread protection after resin’ surface curing
time.
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To work according to standard of
different dope.
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Requirement
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| １.About
temperature |
| Viscidity of primer
and epoxy will be up when cool. So, rigidification will
become slow and don't rigidify completely. Don't operate
below 5℃. |
| ２.About
humidity |
| Water is harmful
to attaching of the primer and epoxy resin. To make water-
stopping treatment if some cracks leak. Don't operate
when dew possibly. |
| ３.Surface
treatment |
| To cut away the
plumpness of surface and fill up the sunken with epoxy
resin or resin-slurry. The radius of plump corners is
not less than 10mm with 1mm’ max-error. |
| ４.Use
of primer and epoxy resin |
| To adjust viscidity
by temperature up, and don't dilute it with organic reagent.
To mix reagent and hardener appropriately, and don't use
it if it is overtime. |
| ５.About
CFRP |
| Don't fold CFRP
patch at random. To leave 10cm-length along the direction
of unilateral fiber to connect with the next when to attach,
and needn't do it along the other direction. |
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