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Construction
of structure repair and reinforcement after fire
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| Reinforcement
of board |
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§ Figure
of the method of cracks repair
（A）AE160 injection for cracks
(RC member, width of cracks > 0.2mm)
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1. Measure width, length
and shape of cracks carefully, confirm steps of
construction
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2. Rubdown surface
of members with grinding wheel machine or steel-wire
brush where will be paint with sealant |
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3. Confirm
position to inject AE160 into cracks according
to width and shape of cracks |
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4. Install and fix
base with sealant |
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5. Seal the surface
of cracks with sealant to prevent resin from flowing
out and make a 30mm width and 3mm thickness sealed
strap |
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6. Confirm sealant indurate |
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7. Inject AE160 with
sustaining low-pressure method (AE150) |
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8. Remove injectors
after resin indurate |
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9. Remove base and
abrade sealant with grinding wheel machine to make
the surface flat |
（B） Cut v shape grooves and fill them with
epoxy (be fit for brick wall)
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1. Cut v and v or u
shape groove which beyond 1cm width and 1cm depth |
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2. Clear dust in the
grooves with high-pressure machine |
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3. Fill up v shape
groove with epoxy slurry |
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4. Brush surface twice
with elastic dope next day |
（C） Cut v shape grooves and fill
them with elastic glue (be fit for light brick wall or
cracks between two different material)
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1. Cut v and v or u
shape groove which beyond 1cm width and 1cm depth |
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2. Clear dust in the
grooves with high-pressure machine |
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3. Fill up v shape
groove with elastic glue |
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4. Stick glass-fiber
net next day |
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5. Brush surface twice
with elastic dope |
（D） Brush and seal surface of elastic dope
(be fit for brushing cracks)
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1. Clear dust and impurity
on the surface of cracks |
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2. Brush surface twice
with elastic dope |
PS. Cracks should be reinforced with fiber net in this
method in terms of actual situation, and use them in
turn according to spot and cracks.
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| Reinforcement
of beams because tubes cross them or flexibility change |
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Steps of steel plates reinforcement of RC beams
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- Inject epoxy resin into cracks of RC structure by
low-pressure injection method.
- Remove pipes and wires in order to construct.
- Clear out brush layer to exposure RC structure.
- Paint and brush the surface with epoxy interface
agglutinant where there are sand and cracks, next,
repair it with epoxy light glue (or epoxy slurry).
- Install SS400-8mm steel plates and fix M12 chemical
anchors with 30mm distance between anchors.
- Seal those sides around steel plates and anchors
with epoxy sealant (AE111) to prevent from slurry
overflowing and make vents beforehand on high.
- Inject epoxy steel plates-agglutinant from lower
to higher until vents overflow.
- Examine effect and reinforce agglutinant until fill
up.
- Brush resist-rust paint twice on the outside of
steel plates.
- After complete, provide construction certificate
and manufacturer' material certificate.
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Reinforcement slurry and cracks injection method
Steps:
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1. Clear out
impurity to exposure RC structure |
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2. Clear out
dust on the surface of concrete |
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3. Make epoxy
resin and |
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4. Repair the
surface of concrete and fill it with epoxy
resin slurry (AE130ABC reinforcement slurry). |
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5. After AE130ABC
indurate, inject AE160 into cracks |
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6. Inject AE160
through injection pipe until vent-pipe overflowing |
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7. Remove injection
pipe and vent-pipe next day |
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Honeycomb repair with non-shrinking hi-strength
cement
Steps:
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1. Clear out
impurity to exposure RC structure |
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2. Clear out
dust on the surface of concrete |
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3. Seal members
with four plates, and fill up gaps around |
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4. Make a vent
hole on the top and an injection hole on the
bottom |
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5. Inject non-shrinking
hi-strength cement (AC100 or AC110) through
injection hole, until vent-pipe overflow |
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6. Cut away vent-pipe
and injection pipe next day |
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Reinforcement
of structure system |
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