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GROUT TIES Product
Grout ties are fixed into masonry walls with a high strength polymer modified grout. The deep trough of the helix provides an excellent key between the stainless steel reinforcing rod and the cement based grout.
Grout ties are fixed into masonry walls with high strength cement based grout. The high fin profile of the helix provides an excellent key between the stainless steel reinforcing tie and polymer modified grout.
The strength and integrity of separating masonry layers can be restored using the ties that are fully grouted into deeply drilled boreholes using thixotropic, cementitious grout.
Grout ties are used to reinforce thick or rubble filled walls, reconnect external walls with internal partitions, stabilize parapets and pin masonry arch layers in buildings, bridges and tunnels.
To install the ties 14-18mm diameter clearance holes are drilled into the masonry to a depth that is at least 25mm longer than the tie. Holes are thoroughly washed out with clean water. WHO-60 polymer modified grout is pumped to each hole, filling the bore and any voids. Stainless steel helical tie bars are wound into the unset grout, displacing it tightly into voids. Once set, the high strength grout interlocks with the peaks and troughs of the helix to bond the grout ties to the masonry.
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Description
International Manufacturer of Precision Engineered Helical Bars, Wall Ties & Fixings
Grout ties are fixed into masonry walls with a high strength polymer modified grout. The deep trough of the helix provides an excellent key between the stainless steel reinforcing rod and the cement based grout.
Grout ties are fixed into masonry walls with high strength cement based grout. The high fin profile of the helix provides an excellent key between the stainless steel reinforcing tie and polymer modified grout.
The strength and integrity of separating masonry layers can be restored using the ties that are fully grouted into deeply drilled boreholes using thixotropic, cementitious grout.
Grout ties are used to reinforce thick or rubble filled walls, reconnect external walls with internal partitions, stabilize parapets and pin masonry arch layers in buildings, bridges and tunnels.
To install the ties 14-18mm diameter clearance holes are drilled into the masonry to a depth that is at least 25mm longer than the tie. Holes are thoroughly washed out with clean water. WHO-60 polymer modified grout is pumped to each hole, filling the bore and any voids. Stainless steel helical tie bars are wound into the unset grout, displacing it tightly into voids. Once set, the high strength grout interlocks with the peaks and troughs of the helix to bond the grout ties to the masonry.
PRODUCT SPECIFICATION
Thor Helical grout ties are available in AISI304 grade Austenitic Stainless Steel. The ties are supplied in the following standard sizes
- Lengths: 0.5m, 0.75m and 1.0m
- Diameter: 8mm and 9mm
BS EN 845-1:2013 National Annex NA states that the bars need to provide an equivalent performance to the prescriptive 30mm x 5mm lateral restraint straps and the tension straps should have a declared tensile load capacity of at least 8kN
TYPICAL PERFORMANCE LOADS (taken from CE Mark Testing)
| Tie Size | Tension Load |
|---|---|
| 8mm Diameter | 11.06kN |
| 9mm Diameter | 11.50kN |
Load with 400mm tie-length bonded to brickwork with WHO-60 grout
TYPICAL MECHANICAL PROPERTIES OF THOR HELICAL GROUT TIES
| Product Attributes | 8mm Tie Bar | 9mm Tie Bar |
|---|---|---|
| CSA | 13mm2 | 16mm2 |
| 0.2% Proof Stress | >790N/mm2 | >850N/mm2 |
| Ultimate Tensile Strength* | 1025-1225N/mm2 | 1025-1225N/mm2 |
| Mean Tensile Capacity # | 14kN | 17kN |
* Ultimate Tensile Strength is measured within a calibrated tolerance of +/- 2% # Mean Tensile Capacity is an indicative value derived from CSA x Mean UTS
TYPICAL PROPERTIES – WHO-60 Grout
| Physical Properties | Strength |
|---|---|
| Compressive Strength – 7 days | 35N/mm² |
| Compressive – 28 days | 55N/mm² |
| Tensile Strength – 28 days | 5N/mm² |
| Flexural Strength – 28 days | 12N/mm² |
| Young’s modulus (fully cured) | 13kN/mm² |
This video demonstrates the helical bars being used to create deep brick beams to span a window opening. The stainless steel helical reinforcing bars are bonded with WHO-60 polymer modified grout into cut slots cut into masonry. It offers a quick, simple and durable solution for strengthening and stabalising damaged masonry structures
CE Mark Declaration of Performance Helical Bars (PDF)
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