Sika Swell S-2
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Construction The new technology for watertight construction joints Sika Services AG Construction SikaSwell S-2 is a new generation of a gun grade waterstop ... Sika Services AG Construction ...that extruded with a simple gun between hardened and fresh concrete... Sika Services AG Construction ... expands its volume in contact with water ! Creating a counterpressure that stops the water flow ! Sika Services AG Construction Where to use SikaSwell S-2 ? Construction joints (without movement) in : Foundations Tunnels Retaining Walls Pipe penetrations Penetrations of any kind Sika Services AG Construction Cellars and garages Concrete floors and slabs Sika Services AG Construction Precast elements Precast in general Concrete pipes Segments for underground construction Sika Services AG Construction Sealing of construction daywork joints Sika Services AG Construction Sealing between new and existing construction Sika Services AG Construction Sealing between precast concrete pipes and culverts Sika Services AG Construction Bonding of SikaSwell Profiles Sika Services AG Construction Bonding of Sika Injectoflex Hoses Sika Services AG Construction Sealing of cracks Sikadur-31 SikaSwell S-2 Sika Services AG Construction Sealing of pipe entries Sika Services AG Construction Sealing between different construction materials Sika Services AG Construction How does SikaSwell S-2 work ? SikaSwell S-2 gradually starts to swell in contact with water and can double its volume in only few days... Sika Services AG Construction How does SikaSwell S-2 work ? ... building up pressure between the surfaces that... Sika Services AG Construction ... 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 Sika Services AG Construction Swelling is quick enough to stop water in few hours when a completely dry structure is filled with water ! Sika Services AG 200 180 160 Change in volume (%) Construction Free expansion is greater than 100% after 7 days water inmersion 140 120 100 80 60 40 20 0 1 day 3 days 7 days 14 days Sika Services AG Construction 10 mm 10 mm 10 mm Area = 43.30 mm2 16 mm 16 mm 16 mm Area = 110,85 mm2 Expansion >2 times in 7 days ! Sika Services AG Construction No profile Water flows through the construction joint With SikaSwell S-2 water can pass at the beginning but in a very limited quantity SikaSwell S-2 After expansion the pressure generated by SikaSwell S-2 assures a perfectly watertight joint Sika Services AG Construction 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 Sika Services AG 3000 SikaSwell S Extrusion Force (N) Construction SikaSwell S-2 is based on a new improved formulation SikaSwell S-2 2500 2000 1500 Excellent workability over a temperature range of + 5oC to + 35oC Low extrusion force at + 5oC 1000 500 0 5°C 23°C 35°C Temperature (°C) Sika Services AG Construction SikaSwell S-2 is based on a new improved formulation Good sag resistance even at high temperatures Very short cut-off “string” Others Long shelf life Can be applied on a damp (no standing water) concrete surface SikaSwell S-2 Sika Services AG Construction Optimal swelling properties SikaSwell S-2 Sika Services AG Construction SikaSwell S-2 adheres perfectly to irregular substrates SikaSwell S-2 compensates for irregularities of the hardened concrete surface assuring watertightness Sika Services AG Construction SikaSwell S-2 starts to act before swelling Rubber profile Water can pass ! SikaSwell S-2 Water doesn’t pass ! •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 ! Sika Services AG Construction SikaSwell S-2 can also be applied on vertical surfaces Tixotrophic For easier application cut the nozzle in aprox. 45o angle Sika Services AG Construction Application considerations SikaSwell S-2 has to be applied at the center of the construction element Sika Services AG Construction Application considerations Application in the centre of the concrete section. Minimum cover on both sides : Non Reinforced concrete Reinforced concrete Sika Services AG Construction With a triangular shape Better resistance of fresh profile to wet concrete pouring H2 O Lower sensitivity to extrusion irregularities H2 O Sika Services AG Construction Packaging Two types of packaging are available Unipac Yellow foil Carton Box containing 20 unipacs x 600 cc 4 triangular nozzles 1 cutter 300 ml cartridge 12 cartridges per carton box 12 nozzles Sika Services AG Construction Triangular nozzle (Unipac) Unipac packaging includes triangular shaped nozzles Cartridges have normal nozzle Sika Services AG Construction Profile dimensioning The size of the triangle of SikaSwell S-2 depends on the thickness of the concrete section Concrete thickness Side of triangular section (mm) 20 - 30 15*15*15 30 - 50 20*20*20 20 mm 20 mm 20 mm 15 mm 15 mm 15 mm Bigger or smaller sections can be used depending on jobsite conditions (surface roughness, size of aggregates etc.)) Sika Services AG Construction Size and nozzle sections By Cutting nozzles at different lengths , different sections can be obtained Nozzle size (mm) section (mm2) theoretical length* (m) 15x15x15 98 6.20 20x20x20 173 3.50 Length that can be applied from each unipac 25 mm 25 mm 25 mm 20 mm 20 mm 20 mm 15 mm 15 mm 15 mm * The effective consumption from a 600 ml unipac can be lower than the calculated value depending on the irregularities of the concrete surface ! Sika Services AG Construction Cartridge nozzle cutting 15 * 15 *15 mm 20 * 20 *20 mm 15 (20) mm 15 (20) mm 15 (20) mm Sika Services AG Construction Size and nozzle sections (cartridges) Nozzle size (mm) section (mm2) theoretical length* (m) 15x15x15 98 3.10 20x20x20 173 1.80 Length that can be applied from each cartridge * The effective consumption from a 300 ml cartridge can be lower than the theoretical value depending on irregularities of the concrete surface ! Sika Services AG Construction How to apply SikaSwell S-2 ? Sika Services AG Construction How to apply SikaSwell S-2 ? Very easy ! Sika Services AG Construction Apply over the hardened concrete like an ordinary sealant ! Sika Services AG Construction •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. Sika Services AG Construction 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. Sika Services AG Construction Is SikaSwell S-2 affected by rain after application? 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 Sika Services AG Construction 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 Sika Services AG Construction SikaSwell S-2 Versatile Easy and fast application Low application cost Suitable for site batched or precast concrete Sika Services AG Construction Other SikaSwell solution for watertight construction joints SikaSwell P Swellable profiles Sika Services AG Construction SikaSwell P Sika Services AG Construction SikaSwell P Different types available! 2003 2005 2010 20 20 20 3 5 10 2010H 20 10 2507H 25 7 Sika Services AG Construction SikaSwell solutions for watertight construction joints ! Sika Services AG
