Fosroc Conbextra HF

SKU
id25439
Non Hazardous
A high-flow, non-shrink, cementitious grout. Class R4.
Available in 25 Kg
From £26.40 £22.00
In stock
Only %1 left
Product Description

Fosroc Conbextra HF is a high-flow, non-shrink, cementitious grout conforming to the requirements of BSEN 1504 -3 Class R4 and BS EN 1504-6: Anchoring of reinforcing steel bar.

Best Uses

Fosroc Conbextra HF is used for free flow, non-shrink, cementitious grouting of gap thicknesses 10 to 100 mm. Its advantages include that it is non-shrink, highly flowable, chloride free and is suitable for pumping. Conbextra HF's recommended applications include:

  • Large stanchion baseplates
  • Joints between pre-cast concrete panels
  • Pumped grouting applications
  • Grouting applications where pouring access is restricted
  • Anchoring of reinforcing steel bars
  • Installation of tie bars

Application

Conbextra HF is supplied as a ready to use dry powder. The addition of a controlled amount of clean water produces a free flowing grout for gap thicknesses up to 100 mm. In addition, the low water requirement ensures high early strength and long-term durability. Conbextra HF is a blend of Portland cements, graded fillers and chemical additives. The filler grading produces a highly flowable grout which will not segregate or bleed.

Full application instructions can be found on the product data sheet.

Technical Details

Approvals

  • London Underground Approved: LUL APR No. 2190
  • Conbextra HF complies with LU Standard 1-085 ‘Fire Safety Performance of Materials’.
  • Conbextra HF complies with classification R4 according to BS EN 1504-3.
  • Conbextra HF complies with the requirements of BS EN 1504-6 : Anchoring of reinforced steel bar.
  • Conbextra HF conforms fully to U.S. Corps of Engineers Specification for non-shrink grout CRD-C621-82A and ASTM C1107-91 (Type C).

Technical Info

Components: Single Pack
Type: Cementitious Grout
Stock Colours: Grey
Tintable: No
Application Method: For best results a mechanically powered grout mixer should be used.
Theoretical Coverage: The approximate yield per 25 kg bag is 13.25 Litres Flowable and 13.5 Litres Fluid
Water Addition Per Bag: 4.5 Litres per 25 Kg bag Flowable and 4.8 Litres per 25 Kg bag Fluid
Compressive Strength:

EN 12190:1999. Class R4 > 45 MPa.

1 Day at 20°C = 22 MPa
7 Days at 20°C = 55 MPa
28 Days at 20°C = 70 MPa

Minimum Thickness: 10mm
Maximum Thickness: 100mm
Placing: Place the grout within 20 minutes of mixing to gain the full benefit of the expansion process.
Cleaner / Thinner: Conbextra HF should be removed from tools and equipment with clean water immediately after use. Cured material can be removed mechanically, or with Fosroc Acid Etch.
Shelf Life: 12 months if kept in a dry store in sealed bags. If stored in high temperature and high humidity locations the shelf life may be reduced to less than 6 months.
Packaging: Available in 25 Kg

For best results a mechanically powered grout mixer should be used.

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