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Technical Dayta Sheet Compedium

CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL SewperCoat® Wet Spray High performance mortar with superior biogenic corrosion resistance Description SewperCoat® Wet Spray is a mortar designed to provide exceptional resistance to the biogenic corrosion environment found in sanitary sewers. The unique biogenic corrosion resistance of SewperCoat® Wet Spray is due to its 100% calcium aluminate composition, i.e. the combination of calcium aluminate cement and calcium aluminate aggregates. SewperCoat® Wet Spray can be utilized to rehabilitate sewer infrastructures that have been damaged over years by biogenic corrosion. SewperCoat® Wet Spray can also be utilized to provide a protection lining to new infrastructures that will be exposed to biogenic corrosion conditions. SewperCoat® Wet Spray is a cementitious mortar, fully compatible with the moist environment found in sewers. Advantages The unique properties of SewperCoat® Wet Spray result from the chemical and mineral phases formed during the hydration process. SewperCoat® is unique when compared to other materials such as ordinary portland cement (OPC) concrete, epoxies, poly-vinyl chloride (PVC) or polyethelene because of its ability to inhibit bacterial activity which drastically reduces the production of sulphuric acid. Key advantages of the SewperCoat® Wet Spray are as follows: „ Inhibits bacterial activity „ Neutralizes sulfuric acid „ Readily adheres to damp concrete „ Easy Monolithic installation „ Provides Long Term corrosion protection „ Contains no VOC’s INDEX 46 Technical Data Sheet Chemical composition of main constituents January 2012 Page 1 Substances Typical % by Weight Al2O3 39-44 CaO 35-40 SiO2 2-7 Fe2O3 9-15 Properties Compressive Strength (MPa) (AS 1478.2 - 2005) 6 hours >20MPa 24 hours >40MPa 28 days >70MPa Modulus of Rupture (Flexural Strength) (MPa) (AS 1012.11 - 2000): 24 hours >4.5MPa 28 days >8.5MPa Indirect Tensile strength (AS 1012.10 - 2000): 28 days >3.5MPa Dimensional Change (Drying shrinkage) (AS 1478.2 - 2005): 56 days <600 microstrains Application Instructions Preparation Clean the surface and remove any dust, unsound or contaminated material, plaster, oil, paint, grease, corrosion deposits or algae. Where breaking out is not required, roughen the surface and remove any laitance by light scabbling or grit-blasting. The substrate should be thoroughly saturated with clean water prior to the spray application of the SewperCoat® Wet Spray. Under no circumstances shall the material be applied in an area where running water exists. Application In the wet spray process, the mortar is batched and mixed prior to being pumped along suitable hoses to the discharge nozzle. High velocity air is introduced at the nozzle to disperse the mortar and propel it into position. The impact of the mortar ensures excellent contact with the substrate and good compaction. As the material is batch mixed prior to pumping, the water content can be accurately controlled, ensuring a consistent product is applied to the substrate. The spraying technique employed for each job will depend on the nature of the work and the materials used. Wherever possible, it is recommended that trials are performed with the material and equipment on elements which exhibit the same features as the job to ensure the spraying technique January 2012


Technical Dayta Sheet Compedium
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