Features and use of chemical anchors

In the construction sphere, various types of mounting elements are often used. Their range is constantly expanding. Manufacturers offer new types of fasteners annually. One of these includes a two-component chemical anchor (liquid dowel). In the market, he appeared recently, because of what has not yet managed to become popular among professional and home masters.

What it is?

Chemical anchor – fastener, including adhesive mass, internal thread bushing and reinforcement rod. Metal components are made of corrosion-resistant materials, such as stainless steel or galvanized steel.

They are manufactured in accordance with the GOST R 57787-2017 Regulation.

Such a fastener looks like an ordinary tube with glue with an incoming pin. The composition of the liquid mass includes:

  • Artificial resins made with polyesters, acrylic;
  • fillers;
  • Cumulator substances accelerating the process of polymerization of adhesive mixture.

The principle of operation of this fastener is simple – the hole done in the surface is filled with special glue, after which the reinforcement rod is inserted into it. When hardening glue, the metal rod is reliably fixed in the recess. Due to the unique characteristics of the adhesive composition, it does not expand during polymerization and works quickly – for its complete rejection at a temperature of 15-20 degrees, no more than 40 minutes will be required.

Advantages and disadvantages

Liquid dowels use almost all types of construction work.

One of their important advantages is to ensure the tightness of the compound with the material, the ability to withstand serious power loads.

Other benefits of such fasteners:

  • Easy installation – To secure a dowel from the master, the experience and special skills will not need;
  • the ability to work with most types of building materials;
  • Anchor is not subject to corrosive processes, it is resistant to the effects of various adverse external factors;
  • the possibility of fixing under water;
  • The durability of the connection is at least 50 years;
  • elimination of the occurrence of internal stress due to the same temperature expansion of the base and anchor;
  • High bearing capacity;
  • A large range of liquid dowels – there are products for both internal and external work (in such adhesive mixtures there are no components that allocate toxic evaporations).

Chemical anchors are not the perfect look of fasteners, because there are significant drawbacks for them. To the main ministry referred to the high cost of the material. If you compare with classic spacer dowels, the latter will cost several times cheaper.

The disadvantages also include:

  • Long polymerization of glue at low ambient temperatures, for example, the composition completely curses at 5 degrees only after 5-6 hours;
  • lack of polymerization at negative temperatures;
  • A short storage period – the composition in a closed packaging retains properties for 12 months;
  • The impossibility of storing the open tube – the adhesive mass should be used immediately after the disruption of the packing tightness.

Another significant minus is the impossibility of dismantling anchor at full glue mass polymerization.

Where are applied?

Chemical anchors are indispensable in situations when it is necessary to fix the funny items on building materials with a delicate structure. They are used for drywall, foam block, puzzle plates or for ceramic blocks. Glue mass easily penetrates the pores of building materials, and after harvesting, it reliably fixes the stud at the base.

Liquid dowels apply:

  • For the arrangement of roadside structures, for example, when installing protective anti-shield screens, supports for power lines and lighting posts;
  • For the finishing decoration of buildings with ventilated facades on the walls of cellular concrete blocks;
  • For the installation of volumetric and sweaty architectural objects – columns, stucco;
  • with the reconstruction of elevator mines;
  • when installing and restoration of various monuments;
  • when erecting water parks, decorative fountains and other water structures;
  • When installing advertising boards and other designs.

Chemical anchors are used in the construction sector to work with wood, hollow brick and other materials.

Review of species

Chemical anchors – two-component mixture. Its first component – glue mass, second – hardener. Materials are classified depending on the temperature of operation.

Manufacturers offer summer anchors intended for use at T 5 … 40 ° C, spring-autumn, in which polymerization occurs at T -10 ° … +40 ° C.

The winter liquid dowel is found on sale, capable of hardening at temperatures up to -25 degrees. In addition, chemical anchors are produced in 2 versions: an ampower and cartridge.

Ampulov

Contains an ampoule comprising 2 capsules – with glue and hardener. These 2 components need to be mixed before using a liquid dowel. When connecting glue and hardener, a homogeneous mass is obtained, convenient for use.

The main feature of ampoule chemical anchors – production under the determined size of the screw. To create 1 connections, 1 ampoule will need. Ease of use is due to the lack of need to track the filling of the hole, since the amount of the composition is accurately calculated by the manufacturer to install a concrete hairpin. In this case, the filling is made without nozzle.

Ampoule fastener is recommended to use for the foundations located horizontally. With the introduction of the means in the vertical designs of glue mass will be rapidly dragging down.

Cartridges

These materials are available in 2 variations – in a tube or in 2 cartridges. In the first case, glue and hardener in one container are separated using the inner partition. When pressing a tube of 2 composition simultaneously enter the mixer tip.

It provides a specialized nozzle, providing homogeneous mixing of glue and hardener adhesive.

Chemical cartridge ampoules come in the following types.

  1. Universal. Such formulations are easy to use, because they do not require accurate calculation of the amount of composition for one mount.
  2. Intended for fastening metal hardware in the concrete basis. These mixtures have a thick consistency. Their composition includes corrosion and dextricular inhibitors.

The shortcomings of cartridge liquid dowels include the impossibility of controlling the completeness of the filling of the holes, as well as the need to calculate the flow rate of the hole.

Due to excellent performance and technical specifications, chemical anchors of European trademarks are used by special demand. Imagine the rating of popular manufacturers.

  • Tytan Professional. The company belongs to SELENA HOLDENGU. Under this brand, universal liquid dowels are available (EV-I, EV-W). Compositions are made on the basis of polyester resins. Anchor EV-W – winter means for low temperatures capable of polymerized at T to -18 degrees. Both of these material are allowed to be used when assessing weighty structures, for different repair and restoration activities.

  • Sormat – Finnish manufacturer, Offering liquid dowels in cylinders with different volume. Disposable nozzles are provided for the mixture. Adhesive weight is made of polyester resin consisting of 2 components. Products are intended for fastening structures with medium severity in building materials with a hollow and cellular structure.

  • “Moment”. This is a brand name of the German concern Henkel. The company’s production facilities are located in many countries, including in Russia. Synthetic dowels “moment” are recommended to use for the installation of heavy structures in porous materials. Products of this brand gained particular popularity due to fast polymerization and high compound strength. There are no styrene in such adhesive compositions, due to which they can be used during internal work.

  • Fischer – German manufacturer, Offering ampully chemical anchors (RM and FHP) and cartridge variations (FIS V 360S and FIS V S 150 C). Cartridges will require a building gun.

  • Tox. Another German brand producing ampoule and cartridge anchors. Products have gained popularity at the expense of rapid grasp, ensure reliable connection, working with porous materials.

  • It is worth noting the products of the Hilti brand. Chemical anchors of this manufacturer are permissible to apply in areas of seismic activity, as well as under water. They can be used at temperature mode from -18 to +40 degrees. The manufacturer offers products under the holes of 8 … 30 mm in diameter, so that they can be used when mounting the basis of reinforcement rods.

How to choose?

Most of the universal liquid dowels presented on the market. However, there are several criteria that should be considered when choosing a material. The first thing to consider is the type of foundation. This information is indicated in the manufacturer’s instructions on the package.

Buying adhesive mixture, it is important to see the date of production, since the product storage period is 1 year. After 12 months, the material loses its properties and specifications.

Chemical anchors should be selected in accordance with Temperature regime, in which they will be used. With incorrect selection of adhesive mass may not be able to.

How to use it?

Installing the stud into adhesive mass is not difficult, however, when implementing this task, several important conditions must be performed. Mounting begins with the holes in the base. For this, the perforator with a drill is used (its diameter must be larger than the metal stud in about 2-3 times).

The next stage is a thorough cleaning of the obtained opening from dust and dirt. If you neglect this work, the adhesion of glue and material will not be so reliable. To remove dust from the hole, you can use the vacuum cleaner.

Following actions.

  1. Insert into the hole of the mesh sleeve (Its use must when working with cellular materials and hollow bricks). It needs to be installed before the introduction of adhesive mass. The use of a mesh sleeve contributes to a uniform distribution of the composition along the length of the hole and in all its parties.
  2. To fill the shpure qualitatively, you should use a special dispenser. Mass should fill the entire volume of the hole.
  3. Inserting studs manually. With the length of the product more than 50 cm it is advisable to use a special conductor that supplies a pressure rod. When exploiting amphel liquid dowels, the hairpin must be clamped into the cartridge drill and enter the fastener when the equipment is working on medium turnover.

After inserting an anchor bolt into the hole, the composition is harvested. Mostly glue dries for half an hour. Check the perpendicularity of the metal rod need immediately after it is installed in Shpur. After a few minutes, due to the polymerization of the composition, the stiletto position will not be able to change.

About how to mount a chemical anchor, look next.

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