Why are flexible connections needed? Types and installation of flexible connections for brickwork. Main characteristics of products

The Continent company offers flexible basalt bonds Galen plant. You can get acquainted with the prices for basalt bonds in price list In chapter ceramic blocks"related products for laying ceramic blocks." Galen Company is a leader domestic market for basalt-plastic building materials, which occupies more than 50% of the market composite connections Russia and the CIS. The plant is a successful manufacturer of flexible connections, facade dowels, reinforcement and mesh.
Flexible basalt connections - a necessary element during execution masonry work, providing a strong connection between brick walls - load-bearing and facade. Flexible basalt connections must have high strength and anchoring ability, and also be resistant to alkaline environments cement mortars and concrete, without reducing the thermal resistance of the wall and without disturbing the uniformity of its temperature field. The latter practically eliminates the use of metal flexible connections and construction meshes, because because of high thermal conductivity metals, they become “cold bridges”, which reduce the thermal resistance of the wall by about 10%. In addition, to ensure the alkali resistance of such bonds, they should be made of expensive alloy steel. This is primarily due to the appearance on the building materials market of flexible connections made of oriented (uniaxially reinforced) polymer composites, the thermal conductivity of which is, as a rule, 100 times lower than that of metals, and the level of deformation-strength indicators is even slightly higher than that of steel. Flexible basalt ties for masonry face brick are rods that are molded from a bundle of basalt fiber impregnated with an alkali-resistant epoxy binder and have a corrugated surface. Basalt fiber was selected as having the highest resistance in an alkaline cement environment. Below are the values of the level of strength retention of a 2 mm thick sample made of basalt fiber. Calculation of the predicted degree of damage to basalt-plastic in the alkaline environment of concrete using experimentally established values of the coefficients of diffusion and sorption of alkali in the named composite showed that even after 50 years of operation in moisture-saturated concrete, the thickness of the surface layer of the flexible basalt-plastic bond damaged by alkali will not exceed 11 microns, i.e. . the strength and rigidity of the connection will remain virtually unchanged.

Flexible Galen connections made of basalt plastic for brickwork(TU 5714 - 006 - 13101102 - 2009) with a diameter of 6 mm are produced according to TS 2352 - 08 in lengths: 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm and 600 mm. Typically used in three-layer brick walls With internal insulation and connect the supporting and facing layers together. The flexible connection is a round rod with sand thickenings at the ends, which act as an anchor when fixed in the mortar joints of the masonry. Sand coating ensures adhesion with mortar.
Specifications:
Breaking tensile stress - not less than 1000 MPa;
Breaking stress during bending - not less than 1000 MPa;
Tensile modulus of elasticity - 51000 MPa;
The pullout force from the M100 solution is not less than 4000 N;
Thermal conductivity - 0.46 W/M 0 C.
Marking - BPA-300-6-2P:
BPA - basalt-plastic reinforcement;
300 - connection length (mm);
6 - rod diameter (mm);
2P - 2 sand anchors.

The flexible connection length (L) for a wall with an air gap is selected as follows:
L=90 mm+T+40 mm+90(150)mm
where T is the thickness of the insulation layer, 40 mm is the size of the air gap, 90 mm is the minimum depth of embedding of the flexible connection in the facing layer, 90 mm is the minimum and 150 mm maximum depth embedding a flexible connection into a load-bearing wall.
For a wall without a ventilated gap: L=90 mm+T+90(150)mm.
Installation of flexible connections:
The number and location of flexible connections in multi-layer walls are determined at the stage of design and estimate documentation.
Installation of flexible connections with a diameter of 6 mm creating a ventilated gap, usually 1 square meter a blank wall requires 4 products. When insulating walls mineral wool slab The pitch of basalt-plastic flexible ties both vertically and horizontally is 500 mm. When insulating walls with polystyrene foam or polyurethane foam, the vertical spacing of the ties is equal to the height of the slab, but not more than 1000 mm, the horizontal spacing is 250 mm, but not less than the spacing at the rate of 4 pcs/sq.m.
Additionally, flexible connections are installed around the perimeter of the openings, near expansion joints, at the parapet in increments of 30 cm and in the corners of the building.
The minimum recommended depth for embedding the flexible Galen connection into the facing layer and into the load-bearing wall is 90 mm.
If the horizontal seams of the outer and inner layers in which the connections are mounted do not coincide, then in the inner layer the connections are placed in a vertical seam with careful sealing of the seam with cement-sand mortar.
The technology for installing flexible connections should exclude the possibility of their loosening. It is recommended to first install the thermal insulation layer and only then install flexible connections by laying them on the insulation board or piercing it through it. If the insulation is attached to previously installed flexible connections, it is necessary to wait for the setting time before installing it. mortar in the joints of the masonry in which the ties are installed.

Brick construction has always been and to this day remains highly popular, thanks to the unique properties of brick as a building material. But the advantages of brickwork - such as excellent thermal insulation, reliability and a very long service life - can be negated if flexible connections that are not suitable for the task are used in construction.

Experts recommend abandoning metal reinforcement in favor of basalt flexible ties for masonry - an innovative development that allows you to get rid of “cold bridges”, ensure the strength of structures and make construction more economical.

Basalt flexible ties for brickwork

What is composite flexible link?

This is a rod that has round section and thickened at the ends: these zones allow you to securely fix the reinforcement in the masonry, provide good adhesion To masonry mortar and protect the reinforcement from corrosion. The air gap is provided by a plastic retainer with a latch.

How to choose the right composite flexible connection?

The length of the product, designated L, is selected taking into account the presence/absence of an air gap. In the first case, the calculation is made according to the formula: L = 90mm+T+40mm+90(150)mm (designation T is the thickness of the insulating layer, 40mm is the air gap indicator, 90/150mm is the minimum and maximum depth to which basalt connections are embedded in wall). If a ventilated gap is not provided, the length is L=90mm+T+90(150)mm.

Prices for basalt connections of BPA reinforcement for brickwork

Name of product	Price including VAT RUB/pcs
Name of product	Retail
BPA- 250-6-2P	9,12
BPA- 300-6-2P	10,80
BPA- 350-6-2P	12,60
BPA- 400-6-2P	14,28
Retainer	2,90

Flexible connections for masonry differ

have an extremely low thermal conductivity coefficient (in contrast to highly thermally conductive metal);
characterized by significantly lower mass;
are not susceptible to corrosion and are resistant to alkaline environments;
are produced with high level quality, confirmed by a full set of technical documentation and relevant certificates.

Flexible basalt connections: technical characteristics

Certificate of Conformity of the Gosstroy of Russia No. ROSS RU.SL55.N00042
Certificate fire safety SSPB.RU.UP001.N00259, issued by “POZHTEST” FGU VNIIPO EMERCOM of Russia
Sanitary and epidemiological conclusion No. 21.01.04.571.P.000141.06.02.
Recommended for use by the State Construction Committee of Russia

UNIKMA offers BEVER fastening elements:

For a brick base

Flexible tie-anchor ZV-Welle

Material:
spacer-connecting element made of stainless steel and polyamide sleeve (included in the kit).

external corner

Installation:

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
13000	ZV-Welle 4.0 x 160	4.0 x 135	up to 25
13010	ZV-Welle 4.0 x 180	4.0 x 155	up to 45
13020	ZV-Welle 4.0 x 210 *	4.0 x 185	up to 75
13030	ZV-Welle 4.0 x 250	4.0 x 225	up to 115
13040	ZV-Welle 4.0 x 275	4.0 x 250	up to 140
13050	ZV-Welle 4.0 x 300	4.0 x 275	up to 165
13060	ZV-Welle 4.0 x 320	4.0 x 295	up to 185
13070	ZV-Welle 4.0 x 350	4.0 x 325	up to 215
13075	ZV-Welle 4.0 x 375	4.0 x 350	up to 240
13080	ZV-Welle 4.0 x 400	4.0 x 375	up to 265

Flexible anchor DA-Welle

Material:
spacer-connecting element made of stainless steel and dowel sleeve 6x50 (not included).

Installation:

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
13200	DA-Welle 3 x 160	3.0 x 135	up to 35
13210	DA-Welle 3 x 180	3.0 x 155	up to 55
13220	DA-Welle 3 x 210	3.0 x 185	up to 85
13240	DA-Welle 3 x 250	3.0 x 225	up to 125
13250	DA-Welle 3 x 275	3.0 x 250	up to 150
13260	DA-Welle 3 x 300	3.0 x 275	up to 175
13300	DA-Welle 4 x 160	4.0 x 135	up to 35
13310	DA-Welle 4 x 180	4.0 x 155	up to 55
13320	DA-Welle 4 x 210	4.0 x 185	up to 85
13340	DA-Welle 4 x 250	4.0 x 225	up to 125
13350	DA-Welle 4 x 275	4.0 x 250	up to 150
13360	DA-Welle 4 x 300	4.0 x 275	up to 175
13370	DA-Welle 4 x 350	4.0 x 325	up to 225
13380	DA-Welle 4 x 400	4.0 x 375	up to 275

For installation in masonry joints

Flexible Well-L connection

Material:
stainless steel element.

Installation:

load-bearing wall

facing masonry

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
10600	Well-L 3.0 x 225	3.0 x 200	up to 100
10610	Well-L 3.0 x 250	3.0 x 225	up to 125
10620	Well-L 3.0 x 275	3.0 x 250	up to 150
10630	Well-L 3.0 x 300	3.0 x 275	up to 175
10640	Well-L 3.0 x 340	3.0 x 315	up to 215
10650	Well-L 4.0 x 225	4.0 x 200	up to 100
10660	Well-L 4.0 x 250	4.0 x 225	up to 125
10670	Well-L 4.0 x 275	4.0 x 250	up to 150
10680	Well-L 4.0 x 300	4.0 x 275	up to 175
10690	Well-L 4.0 x 340	4.0 x 315	up to 215

Flexible Multi connection

Material:
stainless steel element.

Installation:

load-bearing masonry

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
11451	Multi 250*	250	up to 100
11461	Multi 280	280	up to 130
11471	Multi 300	300	up to 150
11481	Multi 320	320	up to 170

Flexible Multi-Plus communication

Material:
stainless steel element.

Installation:

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
13490	Multi Plus 280	280	up to 130
13500	Multi Plus 300	300	up to 150
13510	Multi Plus 320	320	up to 170
13520	Multi Plus 340	340	up to 190
13530	Multi Plus 360	360	up to 210

Flexible DUO connection

Material:
the element is made of stainless steel and consists of two parts - a flat perforated tape and a wire with a bend at the end on one side and an S-shape on the other

Installation:

In assortment:

vendor code	Name	Dimensions, mm	Gap, mm
15010	DUO 113	113	up to 60
15020	DUO 133	133	up to 80
15030	DUO 153	153	up to 100
15040	DUO 173	173	up to 120
15050	DUO 193	193	up to 140
15060	DUO 213	213	up to 150

In construction, the quality of fasteners is no less important than the ones used Construction Materials. Therefore, the Slavdom company offers its customers only proven fastening systems. This section offers a wide range of stainless steel anchors BEVER, basalt plastic (Galen) and fiberglass (Biysk), and reinforcement for brickwork.

Among these products, flexible connections for brickwork and concrete are available. Also from the Slavdom company you can purchase fastenings for solid, porous and wooden base, flexible connections for insulation of monolithic foundations, concrete and thermoblocks. Our qualified managers are always ready to advise on products and answer all your questions.
According to European construction standards, the use of fastening elements is no longer an additional accompanying material, and the reinforcement of brickwork is the norm. At correct use anchors give the load-bearing wall extra strength, providing reinforcement for brick walls.

What are the advantages of reinforcement?

Unfortunately, more and more often we hear in the news that “brickwork” or part of the wall has collapsed. Moreover, sometimes we see such cases with newly built houses. All this is connected either with an attempt to save money cash on reinforcing brickwork, or with little market awareness of products that help strengthen brickwork.

We offer anchors that are used to strengthen brickwork made of basalt-plastic (the so-called basalt-plastic reinforcement), fiberglass and stainless steel. It is very important that flexible connections made from these materials are used. As an example: as a result of corrosion of ferrous metal, a partial collapse of the building occurs within a few years after using it as a flexible connection. Since the 60s in the UK, only drive-in and nest-in anchors made of stainless materials have been used.

All anchors have been tested in accordance with GOST requirements. Anchors allow you to reinforce brick, wood, and block reinforcement (including reinforcement of aerated concrete and foam concrete).

Facing brick - the most durable and reliable finishing material of all used in construction.

At the same time, it cannot be used as the main material, which creates certain difficulties when laying it on an insulated wall with the formation of a ventilation gap.

There is a need for a mechanical connection of the facing layer, otherwise there will simply be a free-standing half-brick wall.

If construction is carried out without external insulation, the outer layer is bandaged with interlocking bricks, periodically laid through a certain number of rows.

The situation with an insulated wall is more complicated.

The layer of material completely cuts off the inner and outer parts of the walls, creating difficulties in bonding.

The design of the bundle in such cases is a rod passing through the insulation into the wall, the other end of which is laid between the rows of cladding.

Previously, to connect the facing layer and the wall they used either metal mesh, or (most often) an anchor made of thin reinforcement. This technique had a negative property - since it only heats up or cools down outer layer, then its dimensions are subject to constant changes.

This leads to constant movement of the rods, gradually loosening the sockets and reducing the strength of the fastening. Ultimately, the bundle simply lost its mechanical qualities, since the rods did not stay in the wall.

The solution to the problem was flexible connections with some elasticity. They are capable of changing the direction vector of the rod without destroying the strength of the fill. An anchor-type fastening is made into the wall - when screwed, the rod increases in diameter and is firmly fixed in the socket.

The second end is laid between the rows, connecting the layers. In addition, to seal the insulation material, there is a special plastic washer that presses the insulation to the wall. It does not allow the material to lag behind the wall, eliminating sliding or other deformation.

This type of connection reacts to movements of the outer facing layer with some displacement without weakening the rigidity of the connection with both layers - the main wall and the cladding, which greatly increases the service life and solves the problems of rigid connections.

The material used for making flexible connections is stainless steel or more new development— composite polymer materials:

Basalt plastic.
Fiberglass.

Possessing optimal properties, these materials do not change their properties at all during their entire service life and provide high-quality connection of three-layer wall structures. The rods have an external coating of sand with thickenings at the ends, which significantly enhances adhesion to the sand-cement mixture.

Polymer materials do not create cold bridges, promoting more efficient heat conservation and increasing the service life of wall materials.

Technical characteristics of anchors

Polymer flexible bonds have the following operating parameters::

Full resistance to alkaline effects of cement mortars.
Small specific gravity, no load on the structure.
They do not create radio interference and are magnetically inert.
No cold bridges.
Rod diameter - 6 mm.
Length - 200-600 mm, are produced in 10 mm increments.
Durability - 100 years(calculated).
Coefficient of thermal conductivity - 0.48 W/(m K).
Operating temperature limits - from -60 to +93.
Breaking tensile force - 21500 N.
Modulus of elasticity (min) — 50000 mP A.
Flexural strength - 1500 mPa.
Breakout force - 9970 N.
Minimum immersion depth of the anchor part - 90 mm.

NOTE!

polymer flexible bonds are available by different manufacturers using their own technological processing methods and raw material compositions. That's why specifications may differ to some extent from those given, which does not change general properties anchors and does not reduce their performance.

Main types and markings of flexible connections

Flexible connections may vary by type of use:

For perpendicularly adjacent interior walls. They have the form of a perforated strip, attached in a bent state to the load-bearing wall and laid in the inter-row spaces of the masonry of the adjacent wall. They are made primarily of stainless steel, since the specific nature of internal operation does not threaten the formation of cold bridges.
For three-layer walls with insulation and an outer cladding layer. These are the anchor rods in question from polymer materials with sand applied coating.

Marking of flexible connections fully reflects the parameters of the rod:

BPA - 300-6-2P

where BPA is basalt-sand reinforcement.
300 is the length of the anchor rod.
6 - diameter.
2P - 2 sand anchors.

Sometimes the marking directly indicates the type of material of the load-bearing walls for which the anchor is intended, for example:

SPA -250-6-aerated concrete.

SPA - fiberglass fittings.
250 is the length of the rod.
6 - diameter.
Aerated concrete is a load-bearing wall material. The indication of the material usually indicates the presence of a plastic sleeve at one end, installed like a dowel into a load-bearing wall. Aerated concrete - quite soft material, and conventional installation methods are not suitable for it.

Installation technology

Before you start installing flexible connections (which means before you start facing the house with bricks), you should decide on their size and quantity.

The size is determined by adding the thickness of the insulation with the size of the ventilation gap plus double the filling depth, for example:

L = 90 + T + 40 + 90= 220 + T

where L is the length of the anchor.
T is the thickness of the insulation.
90 and 40 are the depth of anchoring (filling) and the size of the ventilation gap, respectively. With an insulation thickness of 50 mm, anchors 270 mm long will be required.

Installation of flexible connections is carried out according to a certain scheme. The maximum distance between anchors is 60 cm horizontally and 50 cm vertically. In practice, they are installed more often; on average, 1 m2 of wall requires 5 pieces of flexible connections for aerated concrete and 4 pieces. for brick load-bearing walls.

The number of elements can be found in project documentation, but if you don’t have access to it (for example, at the time of purchase), you can simply calculate the area of the walls and purchase the material with some reserve.

The procedure for installing flexible connections in aerated concrete walls is as follows::

By established scheme the centers of the holes are marked, corresponding in height to the row spacing facing bricks.
Using a drill or drill bit from a hammer drill with a diameter of 10 mm, make a hole with a depth of at least 90 mm (usually 100 mm).
Dust from the hole should be removed using a special blower supplied with the set of flexible fittings along with a key for screwing in the anchors.
The anchor is inserted into the hole along the entire length of the sleeve and screwed with a special key until it stops.
The insulation is pressed using a plastic retaining washer.
The free end of the flexible connection is laid between the rows of facing bricks.
Around door or window openings, at parapets and expansion joints, as well as at the corners of the building, additional flexible connections are installed in increments of 300 mm. The distance to the opening vertically is 160 mm, horizontally - 120 mm.

Installation of insulation can be done before laying flexible connections or after that.

In the first case, it becomes possible to more firmly connect the anchor to the wall and seal the holes with mortar. At the same time, installation of insulation is complicated by the need to pierce the material with rods protruding from the wall, which can cause distortion or the formation of cracks.

The second option is simpler, but requires careful selection of a drill to install the anchors into the wall as tightly as possible, since sealing the connection with mortar in this case is very problematic.

When constructing walls with non-vapor-permeable insulation (foam plastic, polyurethane foam) with simultaneous cladding, the recommended sequence of actions changes:

A flexible connection is established.
The outer facing layer is erected to the height of installation of the next anchor.
Insulation is being installed.
The main wall is being laid.
The next anchor is installed.
The process then continues in the same order.

This technique is used due to the absence of a ventilation gap, which allows you to simultaneously build all layers of the wall.

If flexible connections are installed in walls with a ventilation gap, it is also recommended to carry out the masonry ahead of the facing layer:

A connection is established.
The outer wall is built up to the level of the next anchor.
An internal wall is built up to the level of the next anchor.
Insulation is installed between them.
A flexible connection is laid, the insulation is pressed against the load-bearing wall using a locking washer.
The process repeats again.

This option is only suitable for simultaneous construction of walls and cladding, when finishing finished house you should use the very first option.

Useful video

In this video you will learn what flexible connections are:

Conclusion

Polymer flexible bonds are the most convenient option connection of load-bearing wall structures with cladding. The absence of corrosion and fatigue stresses of the material makes the service life as long as possible.

The low thermal conductivity of polymer rods completely eliminates the formation of cold bridges, sweating and destruction of sections of the wall. The elasticity of the anchors allows you to maintain the strength of the adhesion of the rods and prevents them from loosening and falling out of their sockets.

Alkali resistance makes polymer flexible bonds completely immune to cement-sand mortars, keeping the material in working condition for the entire service life.

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