What tools are required?
Machines of this type are an excellent tool for cutting concrete structures. The machine is equipped with a mount and rails to move the saw, so it performs a large amount of work without resting. In addition, the use of such a mechanism has such advantages:
- increasing the depth of penetration up to 7.5 cm;
- execution of complex works in a large volume;
- low vibration and noise level;
- the possibility of fixation of the machine;
- diamond cutting of reinforced concrete in the shortest possible time.
When cutting with such a machine, there are training courses and access to the 380 Watt line.
angle grinder for cutting concrete of this type has interchangeable discs, which are attached to the unit with a screw device. On the construction market there is a wide range of equipment of different sizes and capacities. The depth of the cutout reaches 13 cm. The handheld cutter is easy to move from place to place and to cut in hard-to-reach places. The disadvantages of this machine include the application of great effort from the workers, which reduces the volume and time of the uninterrupted process.
Cutting with a wire
Such equipment is most often used on large construction objects, because it has a high cost. The cutting device is a diamond wire, which cuts the concrete in any direction. This equipment is most often used to dismantle concrete on bridges, piers, columns or other large objects. The advantage of the wire saw is that it is powered by a hydraulic or electric drive, which makes it possible to use the unit in places without access to electricity. The depth of holes made with the diamond wire reaches up to half a meter.
Working with an angle grinder
The tool is popular and necessary in every household. Concrete angle grinder cuts the material to a depth of 15 cm, and with access to both sides of the structure, the thickness of the wall, which it cuts, increases by 2 times. The device is quite mobile, so it enables access even to hard-to-reach areas. When cutting reinforced concrete structures it is better to choose a saw without teeth, because they cling to the metal and the cutting element will be damaged. Toothed discs are also suitable for normal concrete.
Such a device is designed for cutting joints on a horizontal plane. Professional equipment also has disadvantages. First of all, it is the high cost of tools and labor. The device is equipped with a motor and a cutting element, which, with the help of wheels, can easily move on the floor. Depending on the thickness of the slabs, these 2 types of joint cutters are used:
Cutting with a diamond saw
Diamond cutting of concrete is often carried out on sites where there is no access to electricity. In such cases, a chainsaw is suitable. The saw is easy to use and makes cuts at right angles. Appearance is similar to a chainsaw for wood, but the chain is distinguished by the complexity of the bars, which are equipped with grooves for water. It allows you to make cuts without dust. Ease of operation allows you to use the equipment without special training, so the saw for cutting concrete of this type is used in the construction with their own hands.
Diamond cutting in concrete
Cutting of floor slabs, niches and foundations with a gasoline cutter, electric cutter, wire cutter or wall saw.
NO DUST OR DIRT
The use of technology with water avoids the possibility of dust
No need to cut fixtures gas-welding, which is not every site smooth and even cuts
A large order flow and well-functioning logistics system allow us to keep the cost of diamond drilling at a low level.
What is diamond cutting?
Diamond cutting is working in concrete with special tools, the working heads of which are reinforced with technical diamonds. Even monolithic slabs can be cut with this extremely hard material. And this method has a number of significant advantages over others.
First of all, diamond cutting is fast and accurate. Another advantage is its cleanliness and environmental friendliness of work: dust is either absent or much less than with other methods. Diamond cutting is indispensable when creating apertures of complex shape, it is the quietest type of mechanical treatment of reinforced concrete. And the affordability is not the last argument in its favor.
But the main advantage of diamond cutting. it has no shock and vibration action on the power frame of the building. Such cutting doesn’t damage concrete surface, but it is not only important. In the structure of the load-bearing structure do not appear stresses and microcracks, which are very harmful to it. As studies have shown, slab micro-damage caused by percussion tools, reduced the strength and reliability of the structure up to 30%!
You can learn a lot of interesting and useful things about diamond cutting by watching the following
How to saw concrete without dust
When you use an angle grinder to cut concrete, you are inevitably faced with huge puffs of dust that the cutting tool creates. Thick mineral dust not only interferes with the labor process, but also can pose a threat to the master. Of course, you need to use protective goggles, but even in this case, dust is a serious problem, which should be got rid of. In the article, the master plumber will tell you how to angle grinder saw concrete without dust.
Concrete is a tough material, so it is quite difficult to work with it. To perform cutting, most often use an angle grinder (angle grinder). This tool is more commonly known as an “angle grinder”.
A diamond disc is used as the nozzle. Depending on the design features, they are divided into several varieties:
The first option is a solid base with a segmented edge. Such a wheel is low cost, but not too suitable for work with strong materials. We must also take into account that it is only used for dry cutting. A solid disc has a continuous diamond edge, which prevents chipping during cutting. Such a nozzle heats up quickly, so it must be cooled with a continuous stream of water. Combination or turbo diamond discs are universal. It withstands maximum loads, and is also suitable for cutting reinforced concrete.
Before you buy a nozzle of the right type, it is necessary to understand what material will have to work with. Reinforced concrete reinforced with metal bars that the cutter can bump into in the process. Therefore, if the supposed deepening of more than 10 cm, you should use a disc of high strength, that is turbine. Fresh concrete is more abrasive, over time the material hardens, its strength increases. This factor should also be taken into account when selecting a cutting wheel.
The disc segments are attached to the blade either by silver brazing or laser welding. The first one is best suited for wet cutting, the second one only for dry cutting. When choosing a suitable diamond wheel, you should also pay attention to its diameter, which must fit the parameters of the angle grinder. The speed of the disc is also an important criterion. It is better if it will be higher than the maximum possible value stated in the technical specifications “angle grinder”. This will ensure the optimum mode of operation.
Using water makes it possible to cut concrete with an angle grinder without dusting or overheating the tool. The technology allows you to solve several problems at once:
One way to keep the water flowing is to clamp the hose in such a way that the water gets onto the disc. If there is no water supply in the working area, you can involve an assistant in the process. He will use a primitive device from a plastic bottle to wet the wheel. At the same time, the liquid is wetting the place of the cut. It must be done carefully so that the water does not pour into the tool.
The method is not very applicable in multi-storey buildings, as there is a risk of flooding the neighbors from below.
How to make an adapter to the angle grinder to the construction vacuum cleaner to get rid of formed during the cutting “angle grinder” of small particles of material allow angle grinder with built-in vacuum cleaner. But what to do if the need arises to saw concrete with an ordinary tool without additional options? The easiest solution would be to buy a cover for the vacuum cleaner separately or make a device with your own hands.What will be needed: overhead loop, self-tapping screws on metal short, screw with nut M3, sewer pipe elbow 50 mm to 45 or 67 degrees, rubber reduction on the drain pipe 50 mm.
It is necessary to attach a small door hinge from below to the protective hood of the angle grinder. To do this, one hole is made in each hinge and guard.
Then they are screwed together with a screw and nut. It is important to try on the diamond disk right away, so it does not rub against the screw head. The hole on the hood of the angle grinder will not affect its work in the future, so it can be drilled without fear.
Screw the elbow to the second part of the hinge with 2 self-tapping metal screws. They are held well in the plastic. The bend is positioned with the socket with a sealing rubber in the direction of the trigger on the angle grinder. The knee and the hinge are mounted opposite the mowing line at the start of the bend.
Then you need to run the angle grinder and press the knee to the cutting disk, so it chose a slot under itself. When cutting mineral materials, all dust goes straight into the elbow without being sprayed to the sides. This adapter works best with a segmented diamond disk (with slots). A normal one-piece disc can give a little dust flying to the sides.
Then it is necessary to attach the vacuum cleaner to the elbow. For this purpose a rubber reducer is inserted in the socket. The inner diameter of the adapter is adjusted to the thickness of the tube of the vacuum cleaner.
Such adapter works as effectively as special expensive special-purpose hoods, but costs pennies. As the knee is screwed down with one screw, it can be moved if necessary, instead of removing it when it gets in the way of making a deep cut.
This tool is ideal for the 125 mm angle grinder. For a more massive tool, the design must be improved to not support the knee and hold the angle grinder with both hands. It is desirable to connect a vacuum cleaner to the angle grinder through a cyclone to prolong its life.
In the story. How to make a budget miter cutter
As a continuation of the topic, also see our review How to Choose a Grommet Cutter
Cutting concrete without noise and dust
We are often asked on the phone:. Laser cutting concrete. it’s for you? We need a laser without noise and dust to make an opening in the wall. And the answer is one thing: We have diamond cutting! This has not yet been invented for cutting penetrations in apartments. It is worth noting that diamond cutting is not silent! Silent diamond cutting of openings. Is a myth of some construction firms, invented for the success of an advertising campaign.
Diamond cutting in concrete. is the mechanical impact of diamond discs (with diamond segments) on walls using a specialized professional tool, where there is no shock load. Thus, in diamond cutting there is no percussion noise, but there is some motor noise (noisy when working with gasoline cutters), noise of cutting disc (chain, rope, crown) when passing through the wall and reinforcement. Diamond cutting is conventionally divided into manual and machine cutting, which can be with water cooling or without cooling (dry cutting).
Manual cutting. this is cutting with a tool that is in the hands of the worker. Manual methods of cutting can include spline cutters, Partner cutters, gasoline cutters, chain saws and ring cutters. When diamond cutting with a hand tool, it is possible to cut walls up to 30 cm thick (with ring cutters and chain saws up to 50-60 cm). Handheld diamond cutting takes more effort than diamond cutting with a wall saw, but costs less. It is the preferred method in prefabricated houses and monolithic walls up to 24 cm. No need for permission to connect to 380 V, limited water supply, mobility. In a word. Quick diamond cutting of concrete in the right hands.
Machine cutting. is cut with professional tools, mounted on special stands or on mobile units. These are wall saws, drilling machines, floor saws, wire rope machines. Most machines operate from 380 V. In walls that are more than 30 cm thick, diamond cutting with wall saws is the first choice. It is more expensive, but allows you to perform complex work in the shortest possible time. Regardless of which method is used when cutting the opening, the work will be accompanied by noise from the impact drill in the preparatory work and the subsequent dismantling of the cut part (the exception of diamond cutting of the opening into parts). So in any case, if your neighbors are not deaf, they will hear you.
How and by what equipment is cut an aperture in the apartment??
Diamond cutting of apertures in the apartment in 80% of cases is performed with electric 220V hand-held cutters: Makita-Bosch, Partner, petrol cutters and other tools from well-known companies. To reduce dust and wear of the disk, cutting is carried out with minimal water supply from the water tank, the neighbors water is not pouring. Maximum depth of cut on one side 10-35 cm. The opening is cut through on both sides. The work is noisy, dusty, and dirty. Diamond cutting of apertures in load-bearing concrete walls costs from 5000 per 1 sq. km. м.
Here is a video, which shows how much water is used for diamond cutting of the opening with hand saws. You can also see how dirty the work is. In living quarters during diamond cutting water is used as a minimum, and where necessary, preparatory work against leaks is done. When cutting with a wall saw, there is considerably more water, and this can be clearly seen in the second video. Notice that the operator wears headphones. Diamond cutting is noisy, but it’s impactless. The thickness of the monolithic wall is 30 centimeters and it is impossible to make a window in 4 hours without a wall saw.
In a panel house, after cutting the contour of the opening or cutting the opening into 2 parts, we lower the slab on car tires, after which it is dismantled or cut into lifting parts.
Cutting an opening in a common hallway in a 20 cm high stairwell into two parts. The cut parts will be lowered on the tires (in fact, cutting the opening into 4 parts, where the top two parts are pulled out by hand)
Two parts are already cut out. Dismantling beginning.
Diamond cutting with a waterjet. Carved tire aperture. Subsequent diamond cutting into lifting parts.
For even less noisy demolition work, the opening can be cut in parts, increasing the cutting time and costs. Price depends on the number of pieces cut out. For a standard size 2.1 x 0.9 opening, six pieces are enough for a less noisy removal.
Cutting the opening in parts
Recently, customers often ask to cut a standard opening into 30×30 cm pieces, but do not take into account that the noise from diamond cutting is significantly stretched, the amount of water for cutting increases (not good for panel houses) and the cost of the opening becomes more expensive.
Based on our 20 years of experience in cutting openings, we believe that diamond cutting into reasonable parts should be used only in cases where there is no possibility to lower the cut parts, when the opening is wide or high, or there are other technical difficulties. We can just as well cut the opening into parts in triangles, bore it in circles and even cut it with asterisks, but why should we do that?? If diamond cutting allows you to make a standard opening of 2.1 x 0.9 in the 14-18 cm walls for 1.5-3 hours when cutting the opening into 2 parts. We don’t torture our neighbors like we do here.
And the weight of the lowered plate is much less than the weight of building mixes stored in one room to repair the apartment!
To reduce the shock noise diamond cutting of the opening is used
In most cases, in monolithic walls up to 22 cm standard size opening is cut on both sides into two parts. Lowered on tires. And to reduce the cost dismantled on lifting parts. Diamond cutting of openings in solid walls costs 10% more than in panel walls.
Double armature left over from cut opening in monolithic
We cut openings in monolithic walls of 24-30 cm with a wall saw, in this case you need 380 V. Cutting apertures in such walls only with water, water collection by vacuum cleaner 10% of cutting cost. Where we do not use diamond cutting with wall saws:. In most series of panel houses to avoid flooding the neighbors with water. Diamond disc is cooled by running water at the rate of 4-10 liters per minute, and in order to avoid leaks downstairs, it is necessary to take some additional measures and provide waterproofing of floors and joints in rooms with limited space. in case of small amount of work Openings in hard-to-reach places, spherical shape, in monolithic walls more than 1 meter thick we perform diamond drilling. Price is negotiable.
Spherical opening in the floor made by diamond drilling
The technology of making an opening in a brick wall is slightly different: first, a slot is cut on both sides under the lintel, entered the channel at 25 cm on each side wider than the opening and tightened with bolts. And only after that you can start to diamond cut the opening.
Diamond cutting of a wall only on contour of an aperture
The contour of the opening is cut with diamond discs to a maximum disc depth of 12-35 cm on one side, and then the remaining part is removed with a jackhammer.
Reinforced pre-wall opening in a load-bearing brick wall
Diamond cutting in bricks by hand carver to a depth of cut of 40 cm
Openings in the ceiling can be cut with a wall saw or a floor saw. On video diamond cutting a ceiling aperture with a wall saw into parts of 300 kg.
Is it possible to work on the diamond cutting of the opening without the permission from the Moscow Housing Inspectorate??
It is possible to cut the opening without a permit. The contract for performance of works we do not conclude and necessary documents we do not give out. All responsibility lies with the owner of the premises. We can both just cut through the opening and reinforce it. Reinforcement of openings in these cases we make an angle or channel in accordance with the typical projects of Moscow Research Institute of Steel and Alloys. It is possible to make standard reinforcement of the opening according to the projects of another author of the house. But without a technical conclusion to guess 100% in advance what should be strengthening in this case can not be, we can only give a recommendation based on our 20 years of experience.
How long does it take to make a standard opening with reinforcement??
A standard 2.10 x 0.9 m opening in concrete walls up to 20 cm with standard channel reinforcement is made in 1-2 workdays. Diamond cutting of openings in concrete walls up to 22 cm is performed by handheld cutters. Cut of the opening takes 1.5-3 hours.
Do you make only strengthening, if there is already a cut opening?
Yes, we do reinforce existing openings and we are often asked to do just one reinforcement without cutting the opening. There are cases where the opening made a “long time ago” without amplification and there is a prescription moszhilinspektsiya amplify opening according to the project. Sometimes, when the customer has made his own forces to make an opening, but to complete the coordination of alterations requires SRO and acts of hidden works to strengthen the opening. Performing strengthening of the opening, we give the necessary documents to complete the approval of redevelopment (in the presence of the project). In any case, the reinforcement of openings. is our profile.
How much fits in one garbage can?
The maximum volume for one container is a factory sanitary cabine (without plaster, screed and tiles) and a standard 14 cm hole in the concrete wall (sanitary cabine-3300 kg, hole. 700 kg). If breaking another 8 cm concrete partition 8-10 sq.м. or a different size opening, the debris will not fit in one container.
Loaded container after breaking a plaster cubicle and cut an opening in a 13 cm wall.
When the container is loaded with concrete or brick (heavy debris), the container is loaded halfway up the “waterline” (the machine is unable to lift the container) and if there is no light debris that is loaded on top, the container is considered full. It is worth noting that we do not specialize in garbage disposal. Our specialty. diamond cutting, diamond drilling, reinforcing openings and reinforcing load-bearing walls.
How to order?
To place an order for construction work or consultation you can call:
8(499) 394-42-61 8 (926) 152-42-71 8 (925) 771-56-42
No inspection required for standard work. In case of complex or non-standard works preliminary inspection in the presence of a project is free of charge. Consultation on performance of works is paid 3000 up to 10 km from MKAD (possibility or impossibility of departure of the expert is defined by availability of free time).
Within Moscow, minimum debris loading and reinforcing openings are not included in this cost. For the execution of the order at a convenient time for you, it is desirable to contact 3-5 working days in advance.
Also, to calculate the cost of work, you can send a project to e-mail email@example.com WhatsApp 89257715642, 89261524271, giving the address of the object.
WARNING! We have no other sites, But on many sites, the subjects of which are: redevelopment of apartments, diamond cutting, reinforcing openings, cutting concrete and drilling holes. Photos of works made by Slom Service, as well as information from the website slom-servis.ru.
Concrete is a tough material, so working with it is quite difficult. To perform cutting, most often use an angle grinder (angle grinder). This tool is more commonly known as an angle grinder.
Diamond wheel is used as an attachment. Depending on the design features, they are divided into several varieties:
Does Concrete Turn to Dust in a Vacuum Chamber? Concrete Without Oxygen Experiment
The first option is a solid base with a segmented edge. This circle has a low cost, but not too suitable for working with strong materials. Also note that it is only suitable for dry cutting. The solid disc has a continuous diamond edge, which prevents chipping during cutting. Such a nozzle heats up quickly, so it must be cooled by a continuous stream of water.
The combination or turbo diamond disc is universal. It can withstand maximum loads and is even suitable for cutting reinforced concrete.
Before you buy a nozzle of the required type, you must understand what material you have to work with. Concrete reinforced by metal bars that the cutter might encounter in the process. Therefore, if the intended deepening of more than 10 cm, should use a disc of high strength, that is turbocharged. Fresh concrete is more abrasive, over time the material hardens, its strength increases. This factor must also be taken into account when selecting a cutting wheel.
Blade segments are attached to the blade either by silver brazing or laser welding. The first option is more suitable for wet, the second is used only for dry cutting. When selecting a suitable diamond wheel, you should also pay attention to its diameter, which must fit the parameters of the angle grinder. Speed of the blade is also an important criterion. It is better if it is higher than the maximum possible index, stated in the technical characteristics of the “angle grinder”. This ensures an optimum cutting performance.
Collecting dust while cutting
A compromise solution was the idea of collecting dust at the exit of the cut. This is what is implemented in hand-held cutters with disc diameters of up to 350 mm. Depending on the manufacturer, there are models with built-in dust extraction systems (spigots, folding shrouds), and variants in the form of additional devices. Despite the use of a vacuum cleaner, which not only collects the finest dust, but also creates an additional flow of air, the use of laser-soldered discs for dry cutting of reinforced concrete is mandatory. Otherwise, the segments are more likely to slide at the moment of passage of the reinforcement due to the melting of the silver solder, which has a transition temperature of 680 to 750 degrees Celsius, into the liquid state.
Thus, using additional devices in the form of adapters or special enclosures, powerful twin-turbine (total power of 2200 watts) vacuum cleaner made it possible to conduct dry diamond cutting of solid building materials with a disc without dust. The stumbling block, however, is the shallow depth of up to 240 mm when approached from both sides. This is not always sufficient, e. g., for cutting apertures in furnished rooms.
It is worth noting that the dry cutting of concrete walls and floors by steno-cutting machines is not performed. The reason is that both hydraulic and electric machines use water for cooling. The first for cooling the oil and/or motor, the second for cooling the high-frequency converter and the drive itself.
It is possible, of course, to turn to technology of dry diamond drilling and execute aperture by stitching, but the cost of such works will hardly suit the customer, as well as necessity to bring the perimeter of aperture to straight surfaces.
Concrete cutting and drilling technology
Concrete cutting is performed in various construction jobs, depending on this the appropriate tool is chosen.
When performing repairs, it is often necessary to cut the concrete, for example, in order to run utilities.
Cutting can be performed for cable laying, for removal of window opening (for joining with a loggia), if any part of concrete structure needs to be dismantled during re-planning of the room. The cutting technology itself is not very complicated, but requires some knowledge and skills, as well as physical strength.
Important to know!
To legalize openings and hatches in the bearing walls, you will need to submit to the state authorities of Russia, the following documents: the contract for the work, a copy of a permit SRO, act of hidden works, an extract from the journal of the work, the state act, drawn up in the prescribed manner by the contractor.