Concrete anchors

Dowels do not hold in every ground. Depending on the composition of the substrate, there are different solutions. One possibility is to cast in the anchor, ie the use of an injection anchor. Below you will find instructions for setting in anchors.

The use of injection anchors for setting in concrete

There are a variety of situations that may prevail if you want to attach a dowel in the floor, wall or ceiling. For example, the use of dowels in old buildings. Even ripped dowels are such a case. The professional setting in of the anchor is then a good option. It can be used in the following underground:

  • Underground (wall) with cavity tiles
  • Subsoil with too large a borehole, in which a conventional dowel finds no support

Construction of injection plugs

An injection anchor consists of three components:

  • the anchor sleeve
  • the threaded anchor
  • the injection

The anchor sleeve equates to the anchor, the threaded anchor with the screw and the injection is nothing more than a liquid synthetic resin mortar. Depending on the manufacturer, this usually cures completely within an hour. So, if you want to set several dowels, you need to be aware of how fast you can work. It seems better, always first to put each anchor individually and anchor.

This is how you proceed to embed a dowel

Concrete anchors in underground with cavities

First of all, we will explain how to embed a dowel in a subsoil with certain cavities, such as those found in brick cavities. When setting in concrete in a full surface, you proceed a little differently.

For brick hollow walls you should use a special brick drill bit. This has a sharp cutting edge, as it is not available on standard stone drills. Make sure that the cutting edge is really sharp.

For drilling, never set your drill to "impact drilling". As a result, the individual bricks could break out in large unshaped parts. But you need imperatively drilled holes.

Now the anchor sleeve is pushed into the borehole. Subsequently, the synthetic resin mortar is injected. Follow the instructions given in the manufacturer's instructions. Also note its special features and the curing times. Then push the threaded anchor into the hole, center it and allow the resin to harden.

Concrete anchors in full surface

For a full surface, for example solid brick or aerated concrete (aerated concrete), you do not necessarily need the anchor sleeve. Instead, the resin mortar is injected directly into the wellbore. Then insert the thread anchor and let the mortar harden completely.

Tips & Tricks

Concrete anchors or injection anchors are a great professional aid for safely securing very heavy items such as wall cabinets, prongs or sinks. Bear in mind, however, the payloads of the injection anchors used as well as the particularities of the subsurface. This can result in the interaction quickly significantly lower load capacity.

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