Construction Sika Services AG The new technology for watertight construction joints
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Sika Services AG
The new technology for watertight construction joints
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Sika Services AG
SikaSwell S-2 is anew generation of a gun grade waterstop ...
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Sika Services AG
...that extruded with
a simple gun
between hardened
and fresh concrete...
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Sika Services AG
... expands its volume in contact with water !
Creating a counterpressure that stops the water flow !
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Sika Services AG
Where to use SikaSwell S-2 ?Construction joints (without movement) in :
FoundationsTunnelsRetaining WallsPipe penetrationsPenetrations of any kind
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Sika Services AG
Cellars and garagesConcrete floors and slabs
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Sika Services AG
Precast elementsPrecast in generalConcrete pipesSegments for underground construction
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Sika Services AG
Sealing of construction daywork joints
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Sika Services AG
Sealing between new and existing construction
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Sika Services AG
Sealing between precast concrete pipes and culverts
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Bonding of SikaSwell Profiles
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Sika Services AG
Bonding of Sika Injectoflex Hoses
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Sika Services AG
Sealing of cracks
Sikadur-31
SikaSwell S-2
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Sika Services AG
Sealing of pipe entries
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Sika Services AG
Sealing between different construction materials
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Sika Services AG
SikaSwell S-2 gradually starts to
swell in contact with
water and can
double its volume in
only few days...
How does SikaSwell S-2 work ?
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Sika Services AG
... building up
pressure between
the surfaces
that...
How does SikaSwell S-2 work ?
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Sika Services AG
... is slow enough to avoid formation of cracks in fresh
concrete when hardening has not yet started and the
mechanical properties of concrete are still very low
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Sika Services AG
Swelling is quick
enough to stop
water in few hours
when a
completely dry
structure is filled
with water !
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Sika Services AG
Free expansion is greater than 100% after 7 days water inmersion
0
20
40
60
80
100
120
140
160
180
200C
hange in v
olu
me (
%)
1 day 3 days 7 days 14 days
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Sika Services AG
10 mm
10 mm10 mm
16 mm
16 mm16 mm
Area = 43.30 mm2 Area = 110,85 mm2
Expansion >2 times in 7 days !
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Sika Services AG
No profileWater flows through the construction joint
With SikaSwell S-2 water can pass at the beginning but in a very limited quantity
SikaSwell S-2After expansion the pressure generated by SikaSwell S-2 assures a perfectly watertight joint
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Sika Services AG
Before expansion After expansion
When SikaSwell S-2 is in a confined space its expansion results in the filling of all the gaps and cracks around the construction joint and generates a pressure that stops water flow
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Sika Services AG
SikaSwell S-2 is based on a new improved formulation
5°C 23°C 35°C
Temperature (°C)
SikaSwell S SikaSwell S-2
0
500
1000
1500
2000
2500
3000E
xtru
sio
n F
orc
e (N
)Excellent workability over a temperature range of + 5oC to + 35oCLow extrusion force at + 5oC
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Sika Services AG
Good sag resistance even at
high temperatures
Very short cut-off “string”
Long shelf life
Can be applied on a damp (no
standing water) concrete
surface
SikaSwell S-2 is based on a new improved formulation
Others
SikaSwell S-2
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Sika Services AG
Optimal swelling properties
SikaSwell S-2
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Sika Services AG
SikaSwell S-2
compensates for
irregularities of the
hardened concrete
surface assuring
watertightness
SikaSwell S-2 adheres perfectly to irregular substrates
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Sika Services AG
SikaSwell S-2 starts to act before swelling
•Due to their rigidity, profiles cannot compensate irregularities of the concrete. The profile has first to expand to seal these irregularities
•SikaSwell S-2 addapts to the irregularities during applications and therefore seals much faster !
Rubber profileRubber profile
SikaSwell S-2SikaSwell S-2
Water can pass ! Water doesn’t pass !Water can pass ! Water doesn’t pass !
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TixotrophicFor easier application cut the nozzle in aprox. 45o angle
SikaSwell S-2 can also be applied on vertical surfaces
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Application considerationsSikaSwell S-2 has to be applied at the center of the construction element
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Application considerations
Reinforced concreteNon Reinforced concrete
Application in the centre of the concrete section.Minimum cover on both sides :
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With a triangular shape
Better resistance of fresh profile to wet concrete pouring
H2OH2O
Lower sensitivity to extrusion irregularities
H2OH2O
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Sika Services AG
300 ml cartridge12 cartridges per carton box12 nozzles
UnipacYellow foilCarton Box containing
20 unipacs x 600 cc4 triangular nozzles1 cutter
PackagingTwo types of packaging are available
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Sika Services AG
Unipac packaging includes
triangular shaped nozzles
Cartridges have normal
nozzle
Triangular nozzle (Unipac)
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Sika Services AG
The size of the triangle of SikaSwell S-2 depends on the thickness of the concrete section
Bigger or smaller sections can be used depending on jobsite conditions (surface roughness, size of aggregates etc.))
Profile dimensioning
Concrete Side of triangular thickness section (mm)
20 - 30 15*15*15
30 - 50 20*20*2020 mm
15 mm
15 mm
15 mm
20 mm20 mm
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By Cutting nozzles at different lengths , different sections can be obtained
* The effective consumption from a 600 ml unipac can be lower than the calculated value depending on the
irregularities of the concrete surface !
Size and nozzle sections
Nozzle size section theoretical (mm) (mm2) length* (m)
15x15x15 98 6.20
20x20x20 173 3.50
Length that can be applied from each unipac
20 mm
15 mm15 mm
15 mm
20 mm20 mm
25 mm25 mm25 mm
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Cartridge nozzle cutting
15 * 15 *15 mm20 * 20 *20 mm
15 (20) mm 15 (20) mm
15 (20) mm
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Sika Services AG
Size and nozzle sections (cartridges)
* The effective consumption from a 300 ml cartridge can be lower than the theoretical value depending on irregularities of the concrete surface !
Nozzle size section theoretical (mm) (mm2) length* (m)
15x15x15 98 3.10
20x20x20 173 1.80
Length that can be applied from each cartridge
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How to apply SikaSwell S-2 ?
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How to apply SikaSwell S-2 ?
Very easy !
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Apply over the hardened concrete like an ordinary sealant !
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•Fresh Concrete should not
be placed before
2-3 hours.
The skin of the sealant is
strong enough to protect
from being flattered when
concrete is poured from a
hight of up to 50 cm.
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Sika Services AG
If the hight is> 50 cm the curing time of SikaSwell S-2 should be at least 2 days.
During concreting care must be taken that SikaSwell S-2 is completely covered with a dense concrete without any honeycombs. This is best achieved by placing a mortar or fine concrete cover.
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Even if the product has been exposed to
rain for 24 hours there is only a small
expansion because of the initially slow
reaction with water.
Important: there should not be any
standing water.
In any event, it‘s better to protect SikaSwell
S-2 from rain
Is SikaSwell S-2 affected by rain after application?
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Sika Services AG
Although SikaSwell S-2 has been tested
at waterpressures up to 5 bars it’s
normally not recommended for water
pressures higher than 2 bar because of
the limited sealing distance.
For higher pressures it can be used as
adhesive for the Sika Injectoflex System or
in conjunction with other waterproofing
measures
20
m
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Sika Services AG
Versatile
Easy and fast
application
Low application cost
Suitable for site
batched or precast
concrete
SikaSwell S-2
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Sika Services AG
SikaSwell PSwellable profiles
Other SikaSwell solution for watertight construction joints
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Sika Services AG
SikaSwell P
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Sika Services AG
SikaSwell P
2003 20 32005 20 52010 20 10
2010H 20 10
2507H 25 7
Different types available!
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Sika Services AG
SikaSwell solutions for watertight construction joints !