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32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf

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 INDEX 50 Technical Data SewperCoat® Flowable Sheet High performance, high strength, microconcrete reinstatement mortar with superior biogenic corrosion resistance, for form and pour applications Description SewperCoat® Flowable is a mortar designed to provide exceptional resistance to the biogenic corrosion environment found in sanitary sewers. The unique biogenic corrosion resistance of SewperCoat® Flowable is due to its 100% calcium aluminate composition, i.e. the combination of calcium aluminate cement and calcium aluminate aggregates. SewperCoat® Flowable can be utilized to rehabilitate sewer infrastructures that have been damaged over years by biogenic corrosion. SewperCoat® Flowable is a cementitious mortar fully compatible with the moist environment found in sewers. SewperCoat® Flowable is supplied as a ready to use dry powder which requires only the site addition of clean water to produce a pourable, shrinkage compensated, micro-concrete suitable for large volume repairs at a nominal thickness in excess of 20 mm. Advantages SewperCoat® Flowable is ideal for the reinstatement of large, structural sections of concrete as well as for many smaller locations where difficulties of access make hand or trowel-applied mortars impractical. The flowable nature of SewperCoat® Flowable obviates the need for compaction and vibration even where access to the repair zone is restricted or where reinforcement is congested. „ Inhibits bacterial activity „ Neutralizes sulphuric acid „ Readily adheres to damp concrete „ Easy Monolithic installation „ Provides Long Term corrosion protection „ Contains no VOC’s Chemical composition of main constituents Substances Typical % by Weight Al2O3 40-43 CaO 36-38 SiO2 5-7 Fe2O3 10-14 Properties Compressive Strength (MPa) (AS 1478.2 - 2005) 6 hours >20MPa 24 hours >35MPa 28 days >75MPa Modulus of Rupture (Flexural Strength) (MPa) (AS 1012.11 - 2000): 24 hours >6.5MPa 28 days >8.5MPa Indirect Tensile strength (AS 1012.10 - 2000): 28 days >5MPa Dimensional Change (Drying shrinkage) (AS 1478.2 - 2005): 56 days <600 microstrains Application Instructions Preparation The unrestrained surface area of the repair must be kept to a minimum. The formwork should be rigid and tight to prevent loss of material and have properly sealed faces to ensure that no water is absorbed from the repair material. The formwork should include drainage outlets for presoaking and, if beneath a soffit, provision for air-venting. Provision must also be made for suitable access points to pour or pump the mixed micro-concrete into place. Saw cut or cut back the extremities of the repair locations to a depth of at least 20 mm to avoid feather-edging and to provide a square edge. Break out the complete repair area to a minimum depth of 20 mm up to the sawn edge. 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. Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser. The effectiveness of decontamination should then be assessed by a pull-off test. November 2013


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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