Page 384

Technical Dayta Sheet Compedium

CONTENTS INDEX 372 Technical CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL Data Sheet Emer-Seal® Roadseal SL Very low modulus, self-smoothing, one component silicone joint sealant Uses Sealing sawn joints in: „ Asphalt roads & pavements „ Slot sealing of cable installations in asphalt and concrete pavements „ Abutment joints between concrete and asphalt pavements Advantages „ Ready to use „ Easy contractor application „ No mixing required „ Fast rate of cure „ Excellent adhesion to clean dry concrete and sawn asphalt „ Excellent weathering - UV and ozone resistant „ Dispensed from a bulk container by hand or air powered pump „ Large joint movement accommodation Description Roadseal SL is a very low modulus, self-smoothing, onepart, gun applied, silicone joint sealant designed to effectively seal joints in concrete and asphalt roads, runways, carparks and pavements. The extra low modulus characteristics of Roadseal SL allow it to accommodate large cyclic joint movements of plus 100% and minus 50% in both concrete and asphalt pavements, while not generating high tensile stresses in weak asphalt substrates. Roadseal SL is designed to be applied to joints between concrete pavements in order to prevent running water from undermining the pavement. Roadseal SL also serves to prevent stones from being deposited in the joints which would otherwise lock the joints and restrict the free thermal movement of adjacent pavement segments. Roadseal SL may be applied to the joints using a suitable sealant gun, and self-smooths after application thereby eliminating the need for tooling. This property makes Roadseal SL ideal as a slot sealant to encapsulate electrical signal and sensor cables which may be laid in sawn pavement joints. Design Criteria Roadseal SL is designed for use in sawn joints in both concrete and asphalt pavements. All moving joints must be designed so that the maximum movement capability of the sealant is not exceeded. In joints between concrete or asphalt pavements the minimum depth of the sealant bead must not be less than 7 mm. In all joints either a polyethylene bond breaker tape or backing rod must be used to ensure that the correct width to depth profile is achieved and to prevent the sealant from adhering to the base of the joint. The sealant should be applied so that the sealant surface is recessed about 3 mm below the pavement surface. Properties Data quoted are typical for these products, but do not constitute a specification. Form: “Self-smoothing liquid” Colour: Charcoal Grey Physical or chemical Change: December 2009 Page 1 Chemical cure, moisture activated Hardness (Shore A): 10 +/- 2 Application temperature: Minimum 5°C Service temperature: Minus 50°C - 150°C Tooling time @ 23°C : 20 minutes Tack free time @ 23°C: 45 - 60 minutes Movement accommodation factor: Plus 100% - minus 50% Elongation ASTM D412 : 900% Chemical resistance to occasional spillage: Resistant to dilute acids and alkalis. Not resistant to organic solvents Application Instructions Joint preparation All concrete or asphalt joints to which Roadseal SL is to be applied must be a minimum of 7 days old. All joint surfaces must be clean, dry and free from any concrete slurry, oil, dirt or loose material, form release or curing compounds. All joints in asphalt pavements must have clean, dry saw cut joint faces. Saw cut joints in concrete must be thoroughly cleaned of all concrete slurry by a high pressure water wash, followed by drying with high pressure compressed air. After air blasting the surface water away, the joints must be allowed to dry normally for an additional 16 hours. Where atmospheric conditions are not conducive to good drying e.g. low temperatures, high humidity or rain; Primer 10 or primer 13 should be used. Where previously sealed joints are to be re-sealed, mechanically remove all of the existing sealant prior to saw cutting the joint. Care should be taken not to melt any residual asphaltic sealant and spread it onto the joint faces with the hot saw blade. Before application of the Roadseal SL remove any wind blown debris from the joints with a blast of dry, oil free, compressed air. An approved closed cell polyethylene backer rod or bond breaker tape must be installed into the joint before sealant application. When placing the backer rod allow for a 3 mm set down of the sealant from the pavement surface. December 2009


Technical Dayta Sheet Compedium
To see the actual publication please follow the link above