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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 Fosroc® Renderoc HB25 Properties Test method Standard Test result Compressive Strength AS 1478.2 – 2005 5 MPa @ 1 day INDEX 10 Page 2 19 MPa @ 7 days 23 MPa @ 28 days Modulus of elasticity in compression AS1012.17: 1997 1.10 x 104 MPa Chloride Diffusion Nordtest NT Build 443 2.29 x 10-12 m²/sec Flexural Strength AS1012.11 – 2000 4.2 MPa @ 28 days Tensile Strength AS1012.10 - 2000 1.8 MPa @ 28 days Setting Time AS1012.18 - 1996 Initial Set : 3 hours Final Set : 5.5 hours Fresh Wet Density 1400 kg/m³ Drying Shrinkage (25 x 25 x 285 prisms @ 27oC, 55 RH) AS 1478.2 - 2005 < 400 microstrains @ 7 days , 500 microstrains @ 28 days Alkali reactive particles RTA Rapid Mortar Bar Test RTA T363 <0.1% (Non-Reactive) Chemical Resistance The low permeability of Renderoc HB25 severely retards chemical attack in aggressive environments. The cured mortar is impermeable to acid gases, waterborne chloride ions and oxygen Build Characteristics achievable in a single layer Overhead Vertical Hand/Trowel up to 60mm up to 80mm Wet Spray 150-200mm 175-250mm Resistivity <15,000 ῼ cm Clarification of property values: The typical properties given above are derived from laboratory testing. Results derived from field applied. Samples may vary. Application Instructions Preparation Saw cut or cut back the extremities of the repair locations to a depth of at least 10 mm to avoid feather-edging and to provide a square edge. Break out the complete repair area to a minimum depth of 10 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 abrasive-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. Expose fully any corroded steel in the repair area and remove all loose scale and corrosion deposits. Steel should be cleaned to a bright condition paying particular attention to the back of exposed steel bars. Abrasive-blasting is recommended for this process. Where corrosion has occurred due to the presence of chlorides, the steel should be high-pressure washed with clean water immediately after abrasive-blasting to remove corrosion products from pits and imperfections within its surface. Reinforcing steel priming Apply one full coat of Nitoprime Zincrich and allow to dry before continuing. If any doubt exists about having achieved an unbroken coating, a second application should be made and allowed to dry before continuing. Note: If Renderoc HB25 is to be used in conjunction with Fosroc Galvashield XP’s, refer to the current Galvashield XP Technical Data Sheet for reinforcement steel priming information. Substrate priming The substrate should be thoroughly soaked with clean water and any excess removed prior to applying one coat of Nitobond HAR primer and scrubbing it well into the surface. Renderoc HB25 can be applied as soon as the primer becomes tacky. If the Nitobond HAR is too wet, overhead


Technical Dayta Sheet Compedium
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