Stabilisation by needling
Reconstruction targets
Constructive reinforcement of the support structure/ improvement of the transversal tension capability of masonry constructions for the recovery of the fitness for use / conservation of static stability
Reconstruction procedures
Embedding of Ruberstein® Spiral Anchors using Ruberstein® Anchor Grout in bores in transversal direction resp. in direction of the effective transversal forces (needling)
Advantages of the Ruberstein® Spiral Anchor System
- Effective reinforcement with high bonding action in almost all wall materials
- Little invasion into the building structure; application possible even on sensitive surfaces
- Simple processing, no heavy machinery necessary
- Easy storage and transport
- Delivery on rolls - no material loss due to cutting scrap
Construction rules
- Anchor diameter preferably Ø 10 mm or Ø 12 mm, smaller diameters are possible depending on the application
- Anchor length according to static requirements, however ≥ 100 mm
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Number/arrangement of anchors ≥ 2,5 anchors per m², if not specified otherwise,
dhorizontal ≤ 900 mm, dvertical ≤ 450 mm
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Bore diameter depending on anchor diameter at least 12, 14, 16 or 20 mm
Material and accessories
Ruberstein® Spiral Anchors, type Standard (without tip)
Ruberstein® Anchor grout
Commercially available hammer drill
Mortar gun (with filling tube), if necessary pneumatic or spiral pump
Video stabilisation by needling
Processing
- Prepare a bore in the masonry
- Blow out the bore, moisten with water
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Cut the spiral anchor to length and prepare the anchor grout
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Press the anchor grout into the bore
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Turn in the spiral anchor straight into the fresh grout
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Close the wall surface with anchor grout, joint mortar or stone restauration mortar
Bore diameter d | ||||||
---|---|---|---|---|---|---|
12 mm | 14 mm | 16 mm | 18 mm | 20 mm | 22 mm | |
Consumption per m | 0,11 l | 0,15 l | 0,20 l | 0,25 l | 0,31 l | 0,38 l |
Yield per bucket (6 l) | ≈ 53 m | ≈ 39 m | ≈ 30 m | ≈ 24 m | ≈ 19 m | ≈ 16 m |
Consumption / yield of the Ruberstein® Anchor Grout (anchor volume neglected)
Main areas of application
- Reinforcement / stabilisation of natural stone walls and thick brick walls
- Crack needling (cross-wise) in thick wall constructions
- Stabilisation and load carrying capability increase of arched constructions
- Securing of decorative / design elements