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 Fosroc® Conbextra Deep Pour Page 3 129 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) 30 1500 3000 40 2200 3000+ 50 3000 3000+ Application Instructions Preparation Foundation surface The substrate surface must be free from oil, grease or any loosely adherent 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. Particular care should be taken to blow out all bolt holes and pockets. Base plate It is essential that this is clean and free from oil, grease or scale. 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 minimum gap for pouring Conbextra Deep Pour is 25 mm. The formwork should be constructed to be leakproof as Conbextra Deep Pour is a free flowing grout. 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 the pre-soaking water. The unrestrained surface area of the grout 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 50 mm on the opposite side. There should be no gap at the flank sides. 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. It is essential that machine mixing capacity and labour availability is adequate to enable the grouting operation to be carried out continuously. This may require the use of a holding tank with provision for gentle agitation to maintain fluidity. The selected water content should be accurately measured into the mixer. Slowly add the total contents of the Conbextra Deep Pour bag, mix continuously for 5 minutes, ensuring a smooth, even consistency is obtained. Placing Place the grout within 15 minutes of mixing to gain the full benefit of the expansion process. Conbextra Deep Pour can be placed in thicknesses up to 500 mm in a single pour. Any bolt pockets must be grouted prior to grouting between the substrate and the base plate. Continuous grout flow is essential. Removable hopper: For larger pours the grout may be hand placed or pumped into a removable hopper (trough). Sufficient grout must be available prior to starting and the time taken to pour a batch must be regulated to the time taken to prepare the next one. The mixed grout should be poured only from one side of the void to eliminate the entrapment of air or surplus pre-soaking water. This is best achieved by pouring 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. Pumping Where large volumes have to be placed Conbextra Deep Pour may be pumped. A heavy duty diaphragm pump is recommended for this purpose. Screw feed and piston pumps may also be suitable. Maximum aggregate size for pumping is 5.0 mm. Ensure the selected punp is capable of pumping this size of aggregate.
Technical Dayta Sheet Compedium
To see the actual publication please follow the link above