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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 ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL INDEX 26 Technical Data Sheet High performance, free flowing, low alkali, micro-concrete reinstatement mortar Uses Renderoc LA55 is ideal for the reinstatement of large, structural sections of concrete as well as for many smaller locations where difficulties of access make hand or trowelapplied mortars impractical. The highly fluid nature of Renderoc LA55 obviates the need for compaction and vibration even where access to the repair zone is restricted or where reinforcement is congested. It is suitable for use where excellent chloride and carbon dioxide resistance is required or for repairs to concrete affected by alkali-silica reaction (ASR). Renderoc LA55 is alkaline in nature and will protect embedded steel reinforcement. The resistivity of Renderoc LA55 make it suitable for electro-chemical repairs. Important Note 1: When Renderoc LA55 is used in conjunction with Impressed Current Cathodic Protection or Norcure Realkalisation and Desalination methods, the substrate bonding primer should be water or an OPC: Water slurry mixed at a 2:1 ratio. No steel primer should be applied. Please refer to Parchem for further advice. Important note 2: Renderoc LA55 is suitable for use with Galvashield XP incipient anode protection, with a resistivity <15,000 Ÿ cm @ 28 days. Description Renderoc LA55 is supplied as a ready to use blend of dry powders which require only the site addition of clean water to produce a free-flowing, shrinkage compensated, microconcrete suitable for large volume repairs at a nominal thickness in excess of 50 mm. The material is based on Portland Cement, graded aggregates and additives, which minimises water demand, promotes high fluidity, ensures fast strength gain and long-term durability. A unique system controls plastic and long-term drying shrinkage. The aggregate grading is designed to aid uniform mixing and to eliminate segregation under pumping pressures. It’s low alkali content minimises the risk of alkali–silica reaction. The hardened product exhibits excellent thermal compatibility and very low water permeability. Maximum aggregate size is 5 mm. Technical Support Parchem offers a technical support service to specifiers, end-users and contractors, as well as on-site technical assistance. Advantages „ Maximum compatibility with concrete compressive strength, 30-60 MPa „ Unique dual expansion system offers an extremely high level of control of plastic and long-term drying shrinkage „ Low alkali content minimises risk of alkali-silica reaction „ Excellent bond to concrete substrates without independent primer „ Very low permeability provides excellent protection against carbon dioxide and chlorides „ Exceptional flow allows pumping or pouring into restricted locations „ Self-compacting nature eliminates honeycombing and displaces air without vibration „ Suitable for electro-chemical repairs „ Pre-bagged to overcome site-batched variations - only the site addition of clean water is required „ Contains no chloride admixtures „ Potable water approved - complies to AS/NZS 4020:2005 Design Criteria Renderoc LA55 is designed for large volume repairs typically in excess of 50 mm deep. The product can be applied in sections generally between 50 mm - 200 mm thick. Greater thicknesses may be achievable dependent on the configuration of the repair, location and volume of exposed reinforcing steel. Long narrow repairs should be avoided where possible and pours arranged to achieve a length:minimum thickness ratio, of not more than 20:1. Under conditions of high temperature and rapid drying or when very small sections are being constructed this ratio should be reduced. Longer lengths may be achievable, again dependent on configuration, steel position and density, ambient temperature, humidity and other environmental considerations. Consult your local Parchem sales office for further information. Specification Clause The fluid repair system (micro-concrete) shall be Renderoc LA55, a single-component, low-alkali cement-based blend of powders to which only the site-addition of clean water shall be permitted. The micro-concrete shall exhibit a 3 day compressive strength of 30 MPa and a 28 day strength of 60 MPa and shall exhibit the following characteristics when tested to the standards shown. Fosroc® Renderoc LA55 March 2014


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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