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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Supplied as a ready to use dry powder
• The addition of a controlled amount of clean water produces a free-flowing grout
• Low water requirement ensures high early strength and long-term durability
• Conbextra HF is a blend of Portland cements, graded fillers and chemical additives
• Filler grading produces a highly flowable grout which will not segregate or bleed
• Non-shrink
• Highly flowable
• High early age strength
• Chloride free
• Suitable for pumping
• Yield: Approximate yield per 25 kg bag for different consistencies is 13.25L (Flowable/Fluid)
• Fire Classification: Class A1 Non-Combustible
• Conbextra HF is non-flammable
• Please refer to the Product Data Sheet for full details of:
  • Properties
  • Specification Clause
  • Standard Compliance
  • Mixing
  • Application Instructions
  • Curing
  • Anchoring Applications
  • Estimating
  • Cleaning
  • Storage
  • Health and Safety

Application Notes

• For a minimum of 2 hours prior to grouting, the area of cleaned foundation should be flooded with fresh water
• Immediately before grouting takes place, any free water should be removed
• Particular care should be taken to blow out all bolt holes and pockets
• Where water soaking is impossible contact  our Technical Department on 0113 2455450 (option 2) or send a message to [email protected] for advice
• 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 beneath the constructed formwork and between joints
• For mixing quantities up to 50 kg a 1150 watt, 280 to 640 rpm, 110 volt drill, fitted with an MR3 Mixing Paddle is suitable.
• For best results a mechanically powered grout mixer should be used. Larger quantities will require a high shear vane mixer. Do not use a colloidal impeller mixer.
• Place the grout within 20 minutes of mixing to gain the full benefit of the expansion process
• Conbextra HF can be placed in thicknesses up to 100 mm in a single pour
• For thicker sections use Conbextra TS grout

Please see the Product Data Sheet for detailed information.

Limitations

Low Temperature Working:

• When the air or contact surface temperatures are 5°C or below on a falling thermometer, warm water (30°C to 40°C) is recommended to accelerate strength development
• Substrates should be free from ice
• 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 materials should then be adopted, specifically protecting the grout from freezing in the first 24 hours after placing

High Temperature Working:

• At ambient 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

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.