Masonry restoration mortar rkr 4. Restoration (ablation) of old brick walls. Injection of cracks and large cavities

The concept of ablation brickwork includes a whole range of measures aimed at preparing for.

Constructive solidity brick walls is violated for several reasons, the main of which is the general draft of the building.

This includes assessing the quality of masonry, removing old and crumbling materials, cleaning the surface, preparing mortars, filling the resulting voids. But the restoration of brick walls is quite within the power of not only a professional. It is often inappropriate to demolish a building, in one of the walls of which a flaw is suddenly revealed, a crack has gone or bricks have fallen out, forming a hole. This happens under any conditions, even if all experimental scientific recommendations are followed.

Reasons for the destruction of brick walls

The structural integrity of brick walls is violated for several reasons, the main of which is the general draft of the building. A year or two after the completion of construction, the building will still shrink and the restoration of the wall will be required in any case. The pressure of the masonry on the foundation causes the inevitable deformation of the latter, which leads to a defect in the basement. And then the crack goes along the entire height of the brick walls. The influence of atmospheric precipitation can also be added here. In addition to cracks, wall deflection can occur. This happens due to the strong pressure of the vaults and ceilings. In this case, you should find out the cause of the deformation, and only then decide whether to restore the wall or demolish it by building new object taking into account all the errors. Let's talk in more detail about the restoration. First of all, it is necessary to assess the quality of the masonry, make a visual inspection of the joints, and determine the condition of the bricks and masonry composition. In other words, it is calibrated.

Restoration of brickwork

Methods for restoring brickwork

A fine chisel and hammer are used to remove cracked mortar from masonry.

The cheapest, traditional and rather reliable method is counter-drilling. Holes are made at a certain level in a checkerboard pattern or with a chain at specified distances. If the wall is thick, then they are drilled from both sides towards each other. Then they are filled with a hydrophobic material in a creamy or liquid form. To restore the statics of the masonry, the holes are filled with a mineral suspension.

Another way is to partially disassemble the brick walls. The necessary section of the wall is disassembled, waterproofing is laid, the masonry is restored, the work is transferred further. Disadvantages: overspending of material and high cost.

Microwave drying of the masonry may be an alternative method that restoration may require. A microwave field is created in the masonry by an autonomous electrical system. It converts the water into steam, which evaporates through the capillaries. Multipole electrodes are introduced into the ground and the wall, and a current is supplied to them. This method is very quickly reproducible, but does not work if there is groundwater.

A stiff brush should be used to remove mortar residues and cement dust.

Finally, the most expensive is the sawing method. Everything is simple here: they cut through the masonry horizontally, fill the cut with waterproofing material (tapes), the gaps - with special suspensions that restore the statics of the masonry. This is the essence of the restoration using this method. Often, when using this method, an incompatibility arises between the components of the suspensions and the old solution, as a result of which delamination of the compositions occurs. This is perhaps the only, but rather significant, drawback of the saw method.

Lab tests

Laboratory analyzes are one of the essential stages of professional restoration.

Substances are taken from various points of the masonry and analyzed for the content of nitrates, sulfates, salts and moisture. When visually inspecting the capillaries, moisture can not always be detected. For laboratory analysis, a fence is made in the masonry at three (minimum) points, the percentage is measured and the results are compared. If too much capillary moisture is found, cut-off is done.

The content of salts (sulfates and nitrates) is estimated in a similar way. If it is found that there are many of them, a set of measures is taken to prevent the occurrence of the harmful effects of these compounds on the brick. In addition to surface cleaning, cupping is also carried out - the salts are converted into an insoluble state. This method consists in a special chemical treatment, as a result of which the hygroscopic swelling of salts stops, which prevents them from reaching the brick surface, thus stopping the destructive effect of harmful chemical compounds.

Filling of joints and cracks with mortar is carried out by means of a trowel and a float.

With significant "salinity", very light porous compounds are used, which are applied to the masonry. They "pull" the salt onto themselves, after which the plaster is knocked off and thrown away. Then laboratory tests are made again and, depending on the result, either everything is repeated, or the work proceeds to the next stage. If, according to the project, the wall is to be plastered, then a mixture of sanitizing plaster and plaster that accumulates salt is used as the final layer.

Injection of cracks and large cavities

If cavities or large cracks are present in the masonry and its urgent restoration is required, then injection is carried out with epoxy, polyurethane or mineral compounds. This method is one of the most effective of those used to repair brick walls. As a result, the masonry is impregnated with a special solution that does not allow moisture to pass through. The most suitable for this are organosilicon mixtures: silosanes, ethylsiloxanes, methylsiloxanes. White spirit or kerosene are used as solvents. It all depends on the state of the masonry, humidity and load in the place where the crack was formed. The crack must be plugged, packers inserted into it and injected under pressure. Injectable formulations are fluid rather than viscous, and they easily penetrate even the smallest cracks. But there is always the danger of stratification of the solution in the thickness of the wall, and then only the most liquid component will get into the depth of the masonry, and the base, the task of which is to strengthen the masonry, will remain on top. To prevent this from happening, fine sand is added to the composition.

Potholes, chips, loss of brick and suture material

Strengthening the weak sections of the wall by replacing the masonry is used when there is significant damage.

In some cases, it is necessary to keep very old, ancient materials intact. Most often, this situation arises when working with historical masonry and is called the preservation of historical substance. Here, already during a visual examination, it is important to identify all the weakened places. The strength of the material is determined in a laboratory. If necessary (with insufficient strength), the masonry is strengthened with compounds containing silicon. The brick is restored with restoration solutions, and sutures are used for the seams. They must match the sample in strength, grain size and color, this is determined in laboratories. Without laboratory tests, the restoration will be of lower quality.

Mortars used for masonry masonry

Suture and restoration solutions are of three types:

• solutions based on trail and lime;
• cement mortars;
• acrylic solutions.

Their use depends on how strong the masonry is and what technical conditions are presented to a specific object. Very rarely, polyurethane or epoxy resins are used to restore brick walls. Historical lime "passerine tubers" mixed with local sand or cementum is used in the restoration of objects dating back to the 15th century. If it happens that bricks and joints in historical masonry are different in color, then color imitation is allowed for reliability. Various colored glazes based on reversible dyes are used here.

Wall reinforcement scheme by injection: 1 - crack; 2 - injection holes; 3 - branch pipes; 4 - cement solution; 5 - fastening solution.

In general, restoration is a set of measures aimed at preventing subsequent destruction. Professional restoration of brick walls requires the use of all the achievements of modern science.

Modern technologies are guaranteed to ensure the ability of materials not to react to moisture for 10-20 years. Liquid or creamy water repellents based on silane-siloxane are used as preservatives. Less commonly, silicone products are used, even less often - silicones. The most effective are creamy water repellents. They promote the penetration of active substances to the greatest depth and provide more reliable protection.

How to repair brickwork yourself?

First, you need a special set of tools and solutions, namely:

• perforator
• drill;
• hammer;
• chisel;
• jointing;
• Master OK;
• metal brush;
• building dye, additive;
• cement mortar.

Phased restoration of brick walls

To observe the expansion of cracks in brick walls, gypsum (a) and plate (b) beacons are used.

Only when you have firmly strengthened and fixed the wall, you can proceed directly to the repair, that is, to the restoration. Using a drill with a special nozzle, cut the bricks to be removed and all their adjacent seams. With a hammer and a chisel, knock down the joints around the perimeter of the damaged brick, break its fragments and remove them. At the same time, try not to damage whole bricks nearby. Restoration at this stage requires the preservation of their integrity. These bricks should be carefully cleaned from the old mortar, having previously moistened with water from a hose or using a damp sponge.

Prepare the mortar by adding a bonding agent. Dye can also be added here, if necessary. Apply the mortar on all sides of the gaps from the removed bricks. The layer of mortar should be at least 2 cm. Then soak the bricks in water, grease with a solution on all contact sides and insert into the place of the removed ones. To install the bricks correctly, you need to tap on each trowel handle, then they will lie smoother, without distortions. During work, fill in the joints, form the seams with jointing, do not forget to wipe off the drips. After completing the repair work, remove the supports and other reinforcements.

As practice shows, restoration in the construction sector (especially detailed restoration) is one of the most urgent today.

The gray RKR 4 mixture is a special high-quality composition on a cement-lime basis with chemical additives and mineral fillers.

The mixture was developed with the participation of professionals engaged in construction and restoration for more than 40 years in many cities of our country. With its help, cultural monuments, temples and other historical sites were restored. The composition contains such components as cement, lime, sand, marble flour, special additives.

Designed for restoration and masonry work indoors and outdoors.
RKR 4 mortar has good adhesion to concrete and brick substrates, which must first be cleaned of dust, dirt, grease, oil. The surface of the base must be clean and necessarily rough (if necessary, make it rough). Contamination should be removed mechanically. During work in winter, the masonry material should be cleaned of ice and snow. Before applying the solution, the surface should be well moistened.

The solution is prepared as follows: the dry mixture of RKR4 is poured into a tank with clean water and stirred manually or mechanically (with a construction mixer, electric mixer) until a homogeneous mass without lumps is obtained. The prepared solution should be applied within 1.5 hours.
The vapor-permeable mineral solution has a strength of up to 10 MPa, the application temperature is from + 5 ° C to + 35 ° C. The size of the filler is not more than 1 mm and the density is 2 - 2.2 t / m3.

The average consumption of the mixture is from 20 to 25 kg per 1 m2 with a layer thickness of 10 mm.

The mixture is stored in its original packaging in a cool dry place - no more than 1 year.

Solution for restoration work Remmers Restaurierm? Rtel (Remmers Restauriermortel)

DESCRIPTION:
Mineral solution for restoring losses and carrying out restoration work.

SCOPE OF APPLICATION:
Restoration, replenishment of losses and restoration of the profile of mineral bases (natural stone, brick, concrete, artificial stone).
Reproduction of decorative building elements by ramming.

PRODUCT PROPERTIES:
Remmers Restaurierm? Rtel is a ready-to-use dry mixture of industrial production based on mineral raw materials (binder and fillers).
The physical parameters of the product meet the requirements for the lowest possible internal stress and physico-mechanical characteristics, optimized for substrates made of natural stone (compressive and peel strength, water transfer, etc.).
Restauriermörtel is a component of the Remmers Restauriermörtelsystem (with two levels of hardness, n = normal hardness, ref. 0742, 0746, 0749, w = reduced hardness, ref. 0786-0788) and thus meets the requirements set out in the manual for the conservation of stone (Prof. Snethlage / Snethlage).
The filler grain almost completely corresponds to the fine-grained sandstone fraction.
Modifications of the product with a smaller or larger filler are possible, depending on the specifics of the base.

SPECIFICATIONS:
Bulk density: approx. 1.7 kg / dm?
Compressive strength (28 days): normal hardness weich hardness Adhesive strength: after 28 days? 0.5 N / mm?
Elastic modulus (DIN 1048)
(hardness normal / weich): E? 11 * 10? or? 6 * 103 N / mm?
hardness normal approx. 15 * 10? N / mm?
weich hardness approx. 9 * 10? N / mm?
Volume shrinkage (DIN 52450): after 7 days approx. -0.3 mm / m after 28 days approx. -0.7 mm / m

APPLICATION:
A general prerequisite for working with Remmers Restauriermörtel is a load-bearing substrate (with a leveled / uniform hardness profile).
This can be achieved by masonry treatment or consolidation preservation, if necessary in conjunction with treatment with Remmers Antihygro (hygroscopic swelling inhibitor)
Restoration preparation:
On surfaces of cultural and historical value, where masonry processing of the bases will result in the loss of a historically unique surface or pattern, consolidation works of natural stone are used to prepare the base using the Remmers Kiesels? Ureestersystem (KSE) silicic acid ester system.
The exact technique is determined depending on the parameters of the object.
Masonry preparation
Make notches on the areas to be treated at an appropriate angle with a flat chisel or cutting wheel.
Remove damaged, destroyed areas of the surface to a sound base.
The edges should be as close to zero as possible. On highly protruding structural elements (cornices, etc.), a supportive reinforcement using plastic star dowels is required
or stainless steel wire. Fastening can be done with plastic dowels or with densely mixed Remmers Epoxy BH 100 resin (art. 0905).
Application of the restoration solution:
Prior to the application of Remmers Restauriermörtel, form the base with Remmers Grundiermörtel (art. 0643) in one or more coats, especially in the presence of deep defects.
Blow out the areas to be treated with compressed air, moisten thoroughly (it is best to do this also the day before work) and apply sludge / coating from Restauriermörtel mixed in a liquid consistency (approx. 1 l of water per 5 kg of dry mixture).
On the freshly applied sludge, immediately apply the Restauriermörtel solution in a plastic consistency (approx. 750 ml of water per 5 kg of solution) 1-2 mm above the profile of the adjacent areas of the stone.
It is imperative to observe the structure of the masonry seams.
After setting, wipe the solution with a spongy trowel or scrape off with a special wooden tool and after 3-4 hours (when the gryanulyat will pop out when finishing the cycles), adapt it to the original stone surface by stone processing.
Experience has shown that the restoration mortar should not be applied in a thick layer (max. 3 cm).
Application of the mortar in a thin layer on the edge areas can be simplified by adding Remmers Haftfest (art. 0220) to the mixing water (proportion 1: 4), this slightly slows down the cure, but increases the peel strength (adhesion strength).

OPERATING PROCEDURE:
An approximate procedure for performing restoration work on stone using Remmers Grundierm? Rtel and Restaurierm? Rtel products:
1. Mark the area to be treated with a hard pencil or diamond marking pin.
2. Make notches or perimeter cuts around the damaged areas for approx. to a depth of 0.3 cm.
3. Remove loose and damaged elements over the entire surface of the marked areas.
In the presence of deep defects or strongly protruding elements:
4. Drill holes approx. 8 mm in voids with a depth of more than 3 cm, as well as on the lower surfaces and drips of cornices and ledges along the perimeter at a distance of 5-8 cm.
5. Insert plastic dowels into the pre-drilled holes with compressed air.
6. Screw the stainless steel screws into the inserted dowels.
The distance from the base should be approx. 1 - 1.5 cm. (Brass screws are not resistant to corrosion. It is recommended to use V4A stainless steel screws in sizes 5/50 and 5/60.).
When using star-shaped anchors, points 5 and 6 are omitted.
7. Thoroughly clean dusty surfaces with a high pressure water jet.
8. Moisten the treated areas.
9. Sludge immediately with a Grundiermörtel liquid-plastic consistency.
10. Apply a Grundierm? Rtel primer mixture of a densely plastic consistency to freshly sludge areas, but not more than 2 cm in one working pass within 24 hours.
It is imperative to observe the structure of the masonry seams. For multi-layered applications, after the first coat has dried, roughen and moisturize before applying subsequent coats.
Reapply Grundierm? Rtel, first as a slurry, and then on a fresh layer - Grundierm? Rtel in a plastic consistency.
11. Scrape off the surface of the Grundierm? Rtel layer or the profile of the surface to be treated to a level of min. 3-5 mm below the level of the front surface 2-6 hours after application, depending on the atmospheric
impact (or when the grain starts to jump out).
12. After 24 hours, moisten the treated surface.
13. Apply the Restaurierm? Rtel product in a liquid consistency using the slurry method.
14. Apply Restauriermörtel mortar in a plastic consistency (similar to the application of the Grundiermörtel product, see points 9-11), apply 2 mm thick above the level of the front surface of the masonry.
15. Carefully tamp the applied Restaurierm? Rtel, then after a while after setting, wipe the solution with a spongy trowel or scrape off special tool to the desired level. Do not use metal tools!
16. Carefully pull out the set mortar and compact it in the edge areas.
17. Select a scraping tool / scraping tool based on the specifics of machining adjacent areas.
18. Treat the area where the mortar has been applied by adapting it to the surrounding surface (eg using a segmented saw blade for scraping) when the filler pops out and the surface resembles the original natural stone surface.
19. Carefully brush the repaired area with a soft brush.
20. Cleaning the area between natural stone and mortar from sludge residues by flushing or by sandblasting with a special gun.
21. In the next 14 days to carry out multiple wetting of all restored areas.
22. In 3-4 weeks after the restoration of the losses, it is possible to strengthen the entire weathered zone of natural stone with the help of Remmers stone fortifiers (depending on the conditions of the object).
23. Coloring and correction of the restored areas is carried out with the product Remmers Historic Lasur (art. 6476) (water-repellent touch-up) or by the method of silicate
coating (Bohringer technology).
24. For long-term protection against heavy rainfall and atmospheric agents dissolved in water, use Remmers impregnation.

INSTRUCTIONS
Control the setting of the product, especially in the warm season.
In the first 4 days, wet at least 2 times a day to avoid drying out of the solution.
Effective method it is also the covering of the restored areas with damp burlap.
Then (after an appropriate technological break) the surface color adaptation can be carried out with Remmers Siliconfarbe or Remmers Historic Schlömmlasur (art. 6471).
For preventive protection of the stone, upon completion of the work, hydrophobize the entire object with Remmers impregnations.
Whenever ordering a non-standard version of the product, along with the article number, the shade number, as well as the desired strength level ("weich" or "normal") and grain size must be indicated.
When providing samples from the object, the color is determined by the manufacturer at the factory.
If the sample has several pronounced shades or has an iridescent color, it is necessary to clearly indicate the desired shade of the product.
Always carry out a test application of the product!
Product from different batches may have slight color variations!
For large areas, only use material from one batch, otherwise mix products from different batches.

WORK TOOL, CLEANING:
Wide swing brush, trowel, trowel, sponge trowel, scraper, stone tool, high pressure washer, compressor, etc.
Clean equipment and tools fresh with water.

RANGE:
Specialist. colors (with the possibility of imparting hydrophobic properties):
art. 0742 normal, max. grain 0.2 mm
art. 0746 normal, max. grain 0.5 mm
art. 0749 normal, max. grain 2.0 mm
art. 0786 weich, max. grain 0.2 mm
art. 0787 weich, max. grain 0.5 mm
art. 0788 weich, max. grain 2.0 mm
standard colors, medium grain (0.5 mm), no hydrophobic properties:
art. 0748 mittelgrau, MF 100586
art. 0750 altwei ?, MF 100003
art. 0751 gelbocker, MF 100011
art. 0752 rotbraun, MF 100015
art. 0753 t? Rkisgrau, MF 100017
art. 0754 Baumb. Sandstein, MF 100019
art. 0755 gelbgr? N, MF 100029
art.0756 beige, MF100030
art. 0757 ziegelrot, MF 100034
art. 0758 hellbeige, MF 100089
art. 0759 anthrazit, MF 100094
art. 0760 mergel, MF 100124
art. 0761 hellgelb, MF 100202
art. 0762 buntsandstein, MF 100214
art. 0763 ziegelorange, MF 100235
art. 0764 creme, MF 100248
art. 0765 grau, MF 100001
art. 0766 hellgrau, MF 100002
art. 0767 Cottaer Sandstein, MF 100169
art. 0768 grauwei ?, MF 100194

CONSUMPTION:
Standard colors (depending on the application):
OK. 1.8 kg per liter of filling volume spec. colors (depending on application and hardness):
normal: approx. 1.8 kg / l filling volume
weich: approx. 1.3 kg per liter filling volume
Specialist. product variants (depending on composition and application): approx. 1.3-1.8 kg per liter of filling volume

STORAGE CONDITIONS:
Store in original sealed packaging in a dry place on wooden pallets. Shelf life is not less than 12 months

PACKING:
Paper bag 30 kg

The gray RKR 4 mixture is a special high-quality composition on a cement-lime basis with chemical additives and mineral fillers.

The mixture was developed with the participation of professionals engaged in construction and restoration for more than 40 years in many cities of our country. With its help, cultural monuments, temples and other historical sites were restored. The composition contains such components as cement, lime, sand, marble flour, special additives.

Designed for restoration and masonry work indoors and outdoors.
RKR 4 mortar has good adhesion to concrete and brick substrates, which must first be cleaned of dust, dirt, grease, oil. The surface of the base must be clean and necessarily rough (if necessary, make it rough). Contamination should be removed mechanically. During work in winter, the masonry material should be cleaned of ice and snow. Before applying the solution, the surface should be well moistened.

The solution is prepared as follows: the dry mixture of RKR4 is poured into a tank with clean water and stirred manually or mechanically (with a construction mixer, electric mixer) until a homogeneous mass without lumps is obtained. The prepared solution should be applied within 1.5 hours.
The vapor-permeable mineral solution has a strength of up to 10 MPa, the application temperature is from + 5 ° C to + 35 ° C. The size of the filler is not more than 1 mm and the density is 2 - 2.2 t / m3.

The average consumption of the mixture is from 20 to 25 kg per 1 m2 with a layer thickness of 10 mm.

The mixture is stored in its original packaging in a cool dry place - no more than 1 year.

Remmers Restauriermortel.
(formerly Funcosil Restauriermortel)
Article 0748-0769, 0789.
Technical description.
Ready-to-use, factory-made dry mix.
Astringents and additives are exclusively based on mineral raw materials.
Scope of application:
Remmers Restauriermortel is perfect for restoring damaged sandstone masonry and architectural elements, figures, balusters, etc. When using the casting method, use the Remmers Restauriermortel Gf product (article 0588-0590). Remmers Restauriermortel can also be used for the restoration of brickwork. As a rule, the shades of sandstone and brick found in practice in various colors can be selected in the factory in accordance with the selected sample. Thanks to the various processing techniques of Remmers Restauriermortel, as well as the consistency of the mixture used, it is possible to carry out work on the restoration of facing concrete and the installation of cornices.
It can also be used for sealing joints. When filling narrow joints type SVV. For machine processing, take 12 ml Remmers Michol for 30 kg of dry mix.
Product properties:
Remmers Restauriermortel is a ready-to-use, factory-made dry mix (binders and additives) based on mineral raw materials. The physical characteristics of the product correspond to the requirement of the lowest possible internal stress, the product possesses the physical and mechanical properties necessary for bases made of natural stone (compressive strength and adhesion strength, water absorption, etc.).
Remmers Restauriermortel is part of the Remmers Restauriermortelsystem (with two strength levels; n = normal strength, article 0769, w = low, reduced strength, article 0789) and thus meets the requirements of Professor Snetlage's stone conservation principle.
The grain size of the additives in most cases corresponds to fine-grained sandstone. Various modifications (coarse and fine grain) are possible, depending on the specifics of the base.
Corn:
petty<0,2 мм;< />
the average<0,5 мм;< />
large<2,0 мм.< />
Bulk weight:
approx. 1.7kg / l
in 28 days<13Н />
Compressive strength: after 28 days<8Н/>
Compressive strength (low-w): after 28 days> 1N / mm2
Bond strength: 103 N / mm2
Elastic modulus (Young's modulus) according to DIN1048 (n / w): after 7 days approx. -0.3mm / m
Shrinkage deformation DIN52450: after 28 days approx. -0.7mm / m
Colors:
0750 white
0751 ocker - protection
0752 rotbraun - red-brown
0753 turkisgrau- turquoise gray
0754 baumb sandstein - sandstone
0755 gelbgrun - yellow-green
0756 beige - beige
0757 ziegelrot - red brick
0758 hellbeige - light beige
0759 anthrazit - anthracite
0760 mergel
0761 hellgelb - light yellow
0762 buntsandstein - variegated sandstone
0763 ziegelorange - orange brick
0764 creme - cream
0765 grau- gray
0766 hellgrau - light gray
0769 sonder farbton - other shades
Recycling:
The basis for working with Remmers Restauriermortel is a base that has a bearing capacity (stabilization of the strength of the base over the entire surface). This can be achieved by pre-trimming the stone and reinforcing impregnation, if necessary in combination with Remmers Antihygro treatment.
During restoration:
Surfaces of historical importance, for which preliminary chipping of the base may lead to the loss of the pattern, if necessary, should be prepared by using a natural stone impregnation with Remmers stone strengthener. The exact sequence of actions depends on the specifics of the object.
Substrate preparation - stone cutting:
In the areas of the surface to which Remmers Restauriermortel is to be applied, a flat chisel or cut-off wheel is cut or notched at an appropriate angle. Damaged, destroyed surfaces must be smoothed down to intact stone. Edges should not be scraped to zero. Only for strongly protruding building elements, such as cornices, etc., should be pre-reinforced with reinforcement in the form of a plastic or steel dowel with a star-shaped head. Reinforcement can also be done with plastic dowels fixed with Remmers BH-100.
Application of the Restauriermortel restoration mixture:
Before applying Remmers Restauriermortel, especially for deep voids, one or more coats of Remmers Grundiermortel primer must be applied first. Areas intended for re-placement must be pre-blown with compressed air, moistened well (it is advisable to do this the day before) and slurried with Remmers Restauriermortel in a liquid consistency (approx. 1 l of water per 5 kg of mixture). On the freshly sludge surface, immediately apply Remmers Restauriermortel with a plastic consistency (approx. 750 ml of water per 5 kg of mix) 1-2 mm higher than the existing masonry.
Stone processing must be carried out according to the markings. Slightly set Remmers Restauriermortel mortar should be treated with a sponge rubber disc or a special wooden tool and after 3-4 hours the surface should be hewn to the “natural stone effect”. Experience has shown that it is best to apply Remmers Restauriermortel in layers with a maximum thickness of 3 cm.
Thin-layer application on the edge of damaged areas can be facilitated if necessary by adding Remmers Haftemulsion to the barrier water (ratio 1: 4); the hardening time is thus increased and the bond strength is increased.
Sequence of working steps:
An example of a workflow for a stone chipping restoration using Remmers Grundiermortel and Remmers Restauriermortel:
1. Draw a rectangle around the gaps with a hard pencil or diamond scribe on the stone.
2. Make corner cuts or cuts around the damaged area to a depth of approximately 0.3 cm.
3.Remove loose and damaged elements over the entire surface of the damaged areas indicated by notches.
In the presence of deep voids or strongly protruding building elements:
4. Drill holes approximately 8 mm deep in voids more than 3 cm deep, as well as on the lower surfaces and drip edges of eaves and ledges along the perimeter at a distance of 5-8 cm.
5.Insert the plastic dowels into the drilled holes previously blown with compressed air.
6. Screw the corrosion-resistant screws into the inserted dowels. The distance from the base should be approx. 1 - 1.5 cm. (Brass screws are not resistant to corrosion. It is recommended to use V4A stainless steel screws in sizes 5/50 and 5/60.) When using star-head dowels, points 5 and 6 are omitted.
7. Thorough cleaning of dusty surfaces should be carried out using high-pressure water-jet devices.
8. Moisten damaged areas. Sludge immediately with Remmers Grundiermortelschlamme, a liquid-plastic consistency.
9.Apply Remmers Grundiermortel primer mixture of dense plastic consistency into freshly sludge cavities, but not more than 2 cm in one working pass within 24 hours.
Processing must be carried out according to the marking of the stone. In multi-layer application, after the first layer has completely dried, treat it to a rough state and moisten. Re-slurry with a layer of Remmers Grundiermortel of a liquid-plastic consistency and reapply a second coat of Remmers Grundiermortel of a liquid-plastic consistency.
10. Approximately 2-6 hours after application or depending on weather conditions, when the granulate comes out, treat the surface covered with Remmers Grundiermortel so that the protruding elements are 3-5 mm below the front surface. 11.After 24 hours, wet the areas to be repaired.
12. Slurry with Remmers Restauriermorte in a liquid consistency.
13.Apply Remmers Restauriermortel with a dense consistency (as described for the Remmers Grundiermortel mixture in points 9 - 10), approx. 2 mm above the front surface.
14. Carefully compact the applied layer of Remmers Restauriermortel using a sponge rubber disc or a special wooden tool. Do not use a metal trowel!
15.Wipe off the applied layer with careful movements and seal around the edges.
16. Install a scraper or scraper for the appropriate surface treatment around the voids.
17.Treat the areas covered with the mixture in accordance with the texture of the entire surface of the masonry, for example, using a saw blade with stepped teeth to create a pattern in the form of grooves, etc., depending on weather conditions, when fine granulate comes out and thereby creates an external sandstone effect.
18.Gently brush over the restored area with a soft brush.
19.Clean the joints between the natural stone and the restoration mixture from sludge residues using water or a sandblasting gun.
20. Repeatedly wet all restored areas over the next 14 days.
21. 3-4 weeks after the restoration of the masonry, it is possible to strengthen the entire damaged masonry made of natural stone using the Remmers Steinfestiger product (depending on the specifics of the object).
22. If necessary, it is possible to adjust the restored area in color and texture using the Remmers Historic Lasur product (water-repellent glaze) or using the silicate-chalk technique (System Bohringer).
23. Apply long-term protection against rainfall and harmful atmospheric agents dissolved in water using Remmers impregnating products.
Instructions:
The seizure must be monitored especially carefully during the warm season. It is necessary to wet the restored surface at least 2 times a day for the first four days to avoid drying out of the mixture. Good results are obtained by a proven method - covering the restored areas with damp burlap.
Then (observe technological breaks) color matching can be done using Remmers Siliconfarbe or Remmers Historic Schlammlasur / Remmers Historic Lasur. As a preventive protection of the masonry, at the end of the work, the entire building is hydrophobised with Remmers Impragniermittel products.
Along with the article, each order must contain data on the desired strength and grain size, as shown in the example:
Strength: N
Grain: 0.5
Color: 069
The color number can also be specified, or the color can be factory-matched according to the sent sample. Always send a sample!
Tool, cleaning:
Wide brush, trowels, trowel, sponge rubber disc, scraper, stone trimmer, high pressure water jet for cleaning, compressors, etc.
Clean the tool immediately after use with water.
Safety, environmental safety, waste disposal:
More detailed information regarding safety during transport, storage and use, as well as information on disposal and environmental safety, can be found in the current safety data sheet.
Delivery form, consumption, storage conditions:
Delivery form:
Paper bag 30 kg
Product consumption:
Approx. 1.8 kg of mixture per 1 liter of voids (n) or approx. 1.3kg (w)
Consumption depends on the thickness of the applied layer.
Product storage:
In unopened original packaging, in a dry place - at least 1 year.