Fosroc Conbextra HF
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.
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 |
| 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.
