Fosroc® (iss) Conbextra® HF w constructive solutions Highly fluid, dual shrinkage compensated, cementitious grout for gaps 10mm to 125mm thick Uses Conbextra HF is used for ree flow precision grouting in a wide range of applications including = Critical machine base plates, sole plates and columns = Pumped grouting applications = Grouting applications where pouring access is restricted Advantages = Excellent intial flow and flow retention Suitable for pumping or pouring Rapid strength gain facilitates efficient installation and operation of plant Standards Compliance [AS 1478.2.2005 Appendix E Early Volume Change AS 1478,2-2005 Table 4.1.2.2 Consistency Description Conbextra HF, dual shrinkage compensated (Class A/ Class C) cementitious non-shrink grout, is supplied as a ready to se dry powder, The addition ofa controlled amount of clean water produces @ free-flowing precision grout for gap thicknesses 10mm to 125mm. In addition the low water requirement ensures high early strength and long term durability Conbextra HF is a blend of portland coments, graded fillers land chemical additives which impart controlled expansion In both the plastic and hardened states. The filler grading minimises segregation and bleeding over 1 wide range of application consistencies, '& High ultimate strength and low permeability ensure Conbextra HF isnothazardousin accordance with Australian durability of the nardened grout Inventary of Industrial Chemicals. Contains <0.1% RCS. = Hydrogen-tree gaseous expansion Maximum aggregate size for pumping is 2.5mm. = Chlerige free RCS (Respirable Crystalline Silica) Hazard Free = Non-shrink - according to ASTM €1107:2020 Properties ‘Test Method ‘Standard Result ‘Compressive Strength ‘AS 1478,2:2005 | Consistency | WaterAddtion | 1Day | 7Days | 28 Days Sif 2E34 50 3 7 Plastic 3436 3 5 4 Flowable | 3.638 a 8 2 Flud 3E40 2 46 cl Flexural Strength (Modulus | AS 07217-2000 | 1 Day 32MPa of Rupture) 7 Days 95 MPa 28 Days 10.0MPa Indirect Tensile Strength | AS 1012102000 | 1 Day 25MPa 7 Days 45MPa 28 Days 4.7NPa Setting Time TAS 1012, 1851996, ‘5 hours nial set 7.5 hours final sot Fresh Wet Density 2200 kgin- depending on consistency used ‘Alka reactive particles | Rapid Morlar Bar Tost (RTA T363) Non-eactive Flow Characteritics AS 1478.2:2005 19:25 seconds (Flow Gone) ‘Minimum Thickness Maximum Thickness iomm 125mm Clarification ofproperty values: The typical properties given above are derived fromlaboratory testing, Compressive strengths stated above were measured using cube samples. Test results obtained will vary f carried out to an alternative standard fr sample dimensions are used. Note: Compressive strengths stated were measured at bottom end water, eg. the 28 day strength of 62MPa for flowable consistency was obtained at a waler addition of 3.6 itres water per 20kg bag of Conbextra HF. pr 2028 Page ?Fosroc® Conbextra® HF Tost Results to ASTM Specifical ion ©1107: 2020 Tost thea Standard Resa Flow Consisioney Sti c290 20780 ma Setting Time ‘AST 09882017 ta 00 ins hang Height a ary Age at : ve Final Setting Time ASTM €627:2056 0.40% 1 day +0.02% ane ok jit change ct artered rot | asa ciona0'8 oo 200% loist Cure 28 days 40.11%. aedeyibtmysinar | welt Tsay Benim? Compressive Strength ‘asta c108:20205 oan £25 Ninn? mays seen lites per 20k, Flow proper: 1s of mixed grout Note: All tests were carried out at 25°C & 2°C until the age ofthe test, All above test results are independent third party resulls. Copies of thase test resulls are available on request. The tests were carried out al a waler addition rate of 3.6 The flow distances given below in (mm) are intended as a guide. Actual flow distances will vary depending on site Foundation surface The substrate surface must be free from oll, grease or any loosely adherent material. Concrete lsitance shoulé be removed using low impact seabbling or with needle guns to the degree where aggregate is starting to show. Bolt holes or fixing pockets must be blown clean of any dirt fF debris. Bolt holes should also be roughen up using mechanical means. These may need to be grouted beforehand: Base plate / grout interface It is essential that this is clean and free from oll, grease, scale, paint or coating of any kind. Ar pressure relief holes should be provided to allow venting of any isolated high spots. \ al conditions: Gap Depth Flowable Flowable Fluid Fluid (emmy 100mm head 250mm head (mm) | 100mm head (mm) 250mm head {enn} (am) 10 360 77200 900 2500 20 950 2600 7900 ‘3000 Ey 7500 3000 3000 30007 2 2200 3000 3000+ 3000 50 3000 3000 z z Levelling shims If these are to be removed after the grout has hardened, they should be treated with a thin layer of groase. Formwork The formwork should be constructed to be leakproof as Conbextra HF is a free flowing grout. This can be achieved by using foam rubber strip or silicone sealant beneath the constructed formwork and between joints. The formwork should include outlets for draining 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 150mm on the pouring side and 50mm on the opposite side, There should be no gap atthe flank sides. Page 2Fosroc® Conbextra® HF soaking PPre-sosking the formed grouting area with clean waterhelps to ensure good adhesion of the grout a the interface of the concrete foundation andimproves the flow ofthe grout during the installation, The area should be filled with clean water for a minimum 2 hours before the grouting takes place, Immediately before grouting takes place, any free water should be removed by draining or vacuum. Particular care should be taken to blow out any bolt holes and pockets. Mixing A forced-action mixer is essential. Mix for 3to 5 minutes at a slow speed (400/500:pm) in a suitably sized drum using ‘appropriate equipment such as a 120/140mm helical mixing adda fitted to a heavy-duty 1800W mixer. The selected water content should be accurately measured Into the mixing bucket. While mixing, slowly add the total contents of the Conbextra HF bag, mix continuously for a ‘minimum of 3 minutes, (upto 5 minutes) to ensurea smooth even consistency is obtained. Aways add the powder to the Required Lives ofwater | Yield -Itres of Consistency | added per 20kg bag | mixed material Su 28-34 104 Paste 338 107 Flowatle 338 108 Largar quantities wil require a high shear vane mixer. Do ‘not use a colloidal impeller mixer. It is essential that machine mixing capacity and labour avallaniliy Is adequate to enable grouting operation to be carried out continuously. This may require the use of a holding tank with provision for gentle agitation to maintain ‘uid, Place the grout within 15 minutes of mixing to gain the full benefit of the expansion process. Conbextra HF can be placed in thicknesses from 10mm up to 125mm 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 filed / bulked out with Conbextra Grout Aggregate" tominimise exothermheatbuild up. Alternatively Conbextra Deep Pour is available for pours up to 500mm thick. \ al Flingfbulking out ofthe grout should not exceed a ratio of 1 part Conbextra Grout Aggregate to 2 parts Conbextra HF (by weight), Please refer to the Conbextra Grout Aggregate TDS for more guidance on bulking out of cement based sprouts. Any bolt pockets must be grouted prior to grouting between the substrate and the base plate. Continuous grout flow is essential 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, Continual grout pour must be ensured The mixed grout should be poured only from one side of the void 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 HF may bepumped, Aneavy duty diaphragm pump is recommended for this purpose. Screw feed and piston pumps may also be suitable. Maximum aggregate is 2.5mm. Ensure pump is capable of pumping this size aggregate, Curing (On completion of the grouting operation, exposed areas should be thoroughly cured. This snould be done by the use fof Concure A99 curing membrane or wet hessian. Cleaning Conbextra HF should be removed from tools and equipment with clean water immediately after use. Cured material can be removed mechanically. Limitations Low temperature working When the air or contact surface temperatures are 5°C or below on a falling thermometer, warm water (30-40°C) is recommended to accelerate strength development. For ambient temperatures below 10°C the grout consistency should be flowable and the formwork should be maintained In place for at least 36 hours. Normal precautions for winter working with cementitious materals should then be adopted High temperature working Atambient temperatures above 35°C the mixed grout should be stored in the shade. Cool water (below 20°C) should be Used for mixing the grout Page 3Fosroc® Conbextra® HF Supply Conbextra HF is supplied in 20kg moisture resistant plastic bags. Contexira HF 20kg) FO501080-20KG Yiel Consistency 120 kg bag (AS 1478.2-2005 Table (Litres of mixed 44.2.2) material) Si Toa ives Paste 07 tres Flowable 10.8 res Fs ToS wes Storage Conbextra HF has a shel Ife of 36 months from date of ‘manufacture i kept in the original, unopened bags. Refer tothe manufacture date indicated on the packaging. Do not use ifthere are lumps in the product, ora loss of workabilly (requiring more water to be added) is experienced, si elspa ure NE Phares, Foner marae nse ‘ABW 60060951 58 A constructive solutions {ethan tans Grrl” et) Page 4 ern aa Sanaa ae