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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 JOINT FILLERS WATERPROOFING WATERSTOPS ROOFING TIMBER FLOORING ALPHABETICAL INDEX Application Instructions Preparation Foundation surface The substrate surface must be free from oil, grease or any loosely adhered material. If the concrete surface is defective or has laitance, it must be cut back to a sound base. Bolt holes or fixing pockets must be blown clean of any dirt or debris. Pre-soaking Several hours prior to grouting, the area of cleaned foundation should be flooded with fresh water. Immediately before grouting takes place, any free water should be removed with particular care being taken to blow out all bolt holes and pockets. Base plate It is essential that this is clean and free from oil, grease, scale, paint or coating of any kind. Air pressure relief holes should be provided to allow venting of any isolated high spots. Levelling shims If these are to be removed after the grout has hardened, they should be treated with a thin layer of grease. Formwork The formwork should be constructed to be leakproof. This can be achieved by using foam rubber strip or construction silicone sealant beneath the constructed formwork and between joints. In some cases it is practical to use a sacrificial semi-dry sand and cement formwork. The formwork should include outlets for pre-soaking. This must be kept to a minimum. Generally the gap width between the perimeter formwork and the plate edge should not exceed 150 mm on the pouring side and 50mm on the opposite side. It is advisable where practical to have no gap at the flank sides. Mixing and Placing Mixing For best results a mechanically powered grout mixer should be used. When quantities up to 40 kg are used, a slow speed drill fitted with a high shear mixer with a minimum 1200W and between 300-650 rpm. The Protool MXP 1602 E mixer (product code: TT-621941) or equivalent is recommend with the Protool HS2 140 x 600 M14 Helical mixing paddle (product code: TT-614217) or equivalent. Larger quantities will require a high shear vane mixer. Do not use a colloidal impeller mixer. To enable the grouting operation to be carried out continuously, it is essential that sufficient mixing capacity and labour are available. The use of a grout holding tank with provision to gently agitate the grout may be required. Placing At 23oC place the grout within 20 minutes of mixing to gain full benefit of the expansion process. Conbextra C can be placed in thicknesses from 10 mm up to 100 mm in a single pour when used as an underplate grout. Where the grouting gap beneath the base plate exceeds the maximum thickness allowed, then the grout can filled / bulked out with Conbextra Grout Aggregate* to minimise exotherm heat build up. Alternatively Conbextra Deep pour is available for pours up to 500 mm thick. Filling/bulking out of the grout should not exceed a ratio of 1:1. Please refer to the Conbextra Grout Aggregate TDS for more guidance on bulking out of cement based grouts. Any bolt pockets must be grouted prior to grouting between the substrate and the base plate. Continuous grout flow is essential. Sufficient grout must be prepared before starting. The time taken to pour a batch must be regulated to the time to prepare the next one. Pouring should be from one side of the void to eliminate any air or pre-soaking water becoming trapped under the baseplate. It is advisable to pour the grout across the shortest distance of travel. The grout head must be maintained at all times so that a continuous grout front is achieved. Page 3 113 Fosroc® Conbextra C Consistency of mixed grout The flow distances given below in (mm) are intended as a guide. Actual flow distances will vary depending on site conditions: Gap Depth (mm) Flowable 100mm head (mm) Flowable 250mm head (mm) Fluid 100mm head (mm) Fluid 250mm head (mm) 10 320 1080 800 2200 20 850 2300 1700 2700 30 1350 2700 2700 2700+ 40 2000 2700+ 2700+ 2700+ 50 2700 2700+ 2700+ 2700+


Technical Dayta Sheet Compedium
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