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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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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Sealing between precast concrete pipes and culverts

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Bonding of SikaSwell Profiles

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Bonding of Sika Injectoflex Hoses

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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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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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... 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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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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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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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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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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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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Optimal swelling properties

SikaSwell S-2

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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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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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Unipac packaging includes

triangular shaped nozzles

Cartridges have normal

nozzle

Triangular nozzle (Unipac)

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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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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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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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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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Versatile

Easy and fast

application

Low application cost

Suitable for site

batched or precast

concrete

SikaSwell S-2

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SikaSwell PSwellable profiles

Other SikaSwell solution for watertight construction joints

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Sika Services AG

SikaSwell P

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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 !