Stitching cracked masonry
Embedding helical anchors in prepared slots or holes. The anchor type, length, cover and spacing are determined by the repair design.
HELICAL ANCHORS AND MASONRY REPAIR
AnkerBau
Mortar for embedding helical anchors in a system for strengthening cracked masonry structures. Suitable for manual and machine filling of prepared slots and holes.
| Intended use | Embedding helical anchors in masonry |
|---|---|
| Preparation | 3 l of water per 15 kg of dry mortar |
| Grain size | Up to 1.0 mm |
| Dry mix consumption | 1.80 kg per 1 l of mortar |
| Working time | 40 min at 25°C; 60 min at 7°C |
| Application temperature | Material, ambient and substrate temperature +5 to +30°C |
| Delivery method | Mortar pump or manual application |
Technical data
Read values together with the temperature, material state and test conditions.
| Compressive strength after 1 / 7 / 28 days | 10 / 30 / 40 MPa |
|---|---|
| Flexural strength after 1 / 7 / 28 days | 2.5 / 4.5 / 8.0 MPa |
| Pull-off adhesion after 28 days | 2.0 MPa to a concrete substrate |
| Grain size | Up to 1.0 mm |
| Mixing / resting / remixing | 3 min / approximately 2 min / approximately 1 min |
Mortar parameters and adhesion to concrete do not determine the load-bearing capacity of the complete anchorage in masonry. The quantity of 1,80 kg/l refers to the dry product; mixing water is added to make the fresh mix.
- Storage and shelf life
- Dry, cool place away from sunlight; 12 months in the original, unopened packaging.
Applications and selection criteria
First establish the repair objective, substrate condition, presence of water and joint movement.
Horizontal and vertical surfaces
Applications in general construction, industrial construction and historic building renovation. The condition and load-bearing capacity of the masonry must allow the system to transfer forces.
Application conditions and limitations
The mortar does not replace an assessment of the cause of cracking or a strengthening design. Dampen the substrate and remove excess water; do not install an anchor in a dirty, loose or unfilled slot. This is an embedding material, not a standalone injection material for flexible crack sealing.
How the material behaves
Dampened substrate without excess water; measured mixing water. A strengthening system designed to transfer forces; not an expansion joint filling.
1. Mortar
Dry product + water
2. Installation
Layer → anchor → full encapsulation
3. System
Force transfer according to the repair design
Preparation and application
Work sequence after assessing the structure and selecting the method. Full requirements are given in the product instructions.
Prepare slots or holes
Remove contaminants and dust. Dampen the anchorage location and remove excess water; repeat dampening for highly absorbent substrates.
Measure and mix the mortar
For 15 kg of dry product, use 3 l of water. Add the mortar to the water and mix at low speed for 3 min. Wait approximately 2 min, then mix again for approximately 1 min.
Install the anchor with full cover
Place the first layer without voids, install the anchor and apply the second layer. The TDS indicates that stabilising clips may be used.
Finish and protect the area
Smooth the joint; carry out subsequent work after setting, in accordance with the method. Clean tools with water and maintain the pump according to its instructions.
From selection to application
Choose the instructions for your task and calculate material quantities using clearly defined assumptions.
Product documentation
Data, application instructions and safety documents for the supplied material.
Preparing for safe work
Before use, read the current documentation for all supplied components. Select protective equipment, ventilation and cleaning methods appropriate to the material and equipment.
Discuss your project conditions
Prepare a description of the substrate, water, geometry and expected result. Let us select the material and delivery method.