Fosroc - Renderoc HB70

Uses

For the reinstatement of localised patch repairs and larger areas where suitable reinforcement is incorporated. Renderoc HB70 is alkaline in nature and will protect embedded steel reinforcement. It is specifically designed for locations where high build and high compressive strengths are required or in locations where good abrasion resistance is necessary. The mortar is suitable where resistance is required to chlorides and carbon dioxide.

Important Note 1: Where compatibility with lower strength concrete is required, but low permeability and high-build characteristics are important, Renderoc HB25 or Renderoc HB40 should be used. When Renderoc HB70 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 HB70 is suitable for use with Galvashield XP incipient anode protection, with a resistivity <15,000 Ω cm @ 28 days.

Description

Renderoc HB70 is supplied as a ready to use blend of dry powders which requires only the site addition of clean water to produce a highly consistent, high strength repair mortar. The material is based on Portland cement, graded aggregates, special fillers and chemical additives and is polymer modified to provide a mortar with good handling characteristics, while minimising water demand. The hardened product exhibits excellent thermal compatibility with concrete and outstanding water repellent properties. The low water requirement ensures fast strength gain and long-term durability.

Advantages

• High strength and high abrasion resistance
• High build repairs
• Exceptional system of shrinkage compensation provides long-term dimensional stability
• Low permeability provides sound protection against carbon dioxide and chlorides
• Can be applied by the wet or dry spray process for fast, exceptionally high build repairs with enhanced

Characteristics

• Suitable for internal and external use
• Pre-bagged to overcome site-batched variations – only the site-addition of clean water required
• Contains no chloride admixtures
• Potable water approved - complies to AS/NZS 4020:2005
• Maximum compatibility with concrete of compressive strengths >45 MPa