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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 JOINT FILLERS WATERPROOFING WATERSTOPS ROOFING TIMBER FLOORING ALPHABETICAL INDEX Technical Data Sheet High performance, light-weight, very low shrinkage, patch repair mortar Uses For the reinstatement of large areas of concrete where low permeability characteristics, lowest drying shrinkage characteristics is required. Renderoc HB25 has been specifically engineered for vertical and overhead repair work where its lightweight nature makes it ideal. The mortar can also be used for small, localised patch repairs. Where higher compressive strengths are required as well as low permeability characteristics, Renderoc HB40, Renderoc HB70 or Renderoc LA55 should be used. Important Note 1: When Renderoc HB25 is used in conjunction with Impressed Current Cathodic Protection or Norcure Realkalisation and Desalination methods, the substrate bonding primer should be an OPC: Water slurry mixed at a 2:1 ratio. Polymer bonding agents should not be used. No steel primer should be applied. Please refer to Parchem for further advice. Important note 2: Renderoc HB25 is suitable for use with Galvashield XP incipient anode protection, with a resistivity <15,000 Ÿcm @ 28 days. Description Renderoc HB25 is supplied as a ready to use blend of dry powders , requiring only the site addition of clean water to produce a highly consistent, lightweight repair mortar. It is based on Portland cements, graded aggregates, lightweight fillers and chemical additives which provide a mortar with good handling characteristics while minimising water demand. The low water requirement ensures good strength gain and long-term durability. Technical Support Parchem offers a technical support package to specifiers, end-users and contractors, as well as on-site technical assistance. Advantages „ Maximum compatibility with concrete with a compressive March 2014 9 strength in the range 15 - 30 MPa „ Polymer-modification provides extremely low permeability to water, carbon dioxide and chlorides „ Exceptional system of shrinkage compensation provides long-term dimensional stability „ Lightweight formulation enables extra high-build - fewer cold joints „ Frequently obviates the need for formwork „ Can be applied quickly and efficiently by wet spraying „ One component, pre-bagged to overcome site-batched variations „ Contains no chloride admixtures „ Suitable for internal and external applications Design Criteria Renderoc HB25 exhibits a series of performance characteristics designed to achieve maximum compatibility with concrete with a compressive strength greater than 15 MPa. Renderoc HB25 has been specifically engineered for vertical and overhead repair work. It can be applied in sections up to 80 mm thickness in vertical locations and up to 60 mm thickness in overhead locations in a single application and without the use of formwork. Thicker sections can be achieved by the use of formwork or can be built up in layers. Deep pockets can sometimes be filled in a single application dependent on the configuration of the pocket and the volume of exposed reinforcing steel. Build can be dramatically increased by wet spraying. Typical achievable thicknesses are 175 - 250 mm vertically and 150 - 200 mm overhead, although this will depend on substrate profiles and the distribution of steel reinforcement. Consult your local Parchem sales office for further information. The material should not be applied at less than 10 mm thickness. Where higher compressive strengths are required, Renderoc HB40, Renderoc HB70 or Renderoc LA55 should be used. Specification Clause High-build concrete reinstatement mortar The reinstatement mortar shall be a single component polymer-modified, cement-based blend of powders to which only the site addition of clean water shall be permitted. It shall be manufactured to achieve maximum compatibility with reinforced concrete with a compressive strength greater than 15 MPa and as a consequence, shall exhibit the following characteristics when tested to the standards shown. Fosroc® Renderoc HB25


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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