How can you cut a concrete foundation. Cutting concrete without dust: how to saw a corner grinder…

How can you cut a concrete foundation

Hello Nikolai. There are many ways, I will first tell you about how to split the block with a crane, and then several ways to cut the block manually.

Using special equipment

The construction site usually needs to cut the block to fill the gaps between the corners and the technological openings. The overflow is strictly prohibited by the as a pedorator, since with numerous strokes inside the concrete, numerous cracks are revealed that reduce the bearing capacity of the foundation.

According to existing SP 22 standards.13330 (foundations of buildings), SP 50-101 (design of bases/foundations) and standard PPR work plans in prefabricated tape foundations should be used exclusively whole FBS. The designer must make a layout diagram taking into account the size of reinforced concrete products, according to GOST 13579. In practice, the need to split the block occurs in 99%.

Currently, power tools and equipment for him, allowing to cut the foundation unit at one time and, even along the ring (an incision on each of the 4 sides) does not exist. Therefore, the following cutting FBS cut technology is more often used:

• The unit is installed on a rigid base (laid on the side of another FBS or roadless stove) in the standard way of slinging for two mounting loops;
• Then the block is hooked with one loop and lifted by a tap by 5. 10 cm;
• A roulette on the body of a concrete product marks the necessary length of a piece of FBS;
• In this place, metal rolling (corner by rib or steel scrap) is laid under the sole of the split element;

The problem of high.quality blocks is a diagonal split with an unpredictable result. Therefore, professionals donate time to ensure the accuracy of the cut:

After that, the FBS is guaranteed to break off along the line perpendicular to its long part.

Without special equipment

Even the lightest FBS block cannot be mounted manually, so the owner of the real estate under construction has to rent a crane. Therefore, the time of special equipment at the facility is critical, all possible operations are performed manually to reduce the construction budget. Therefore, two “folk” technologies are often used: a split with a wedge or wooden codes.

They allow you to prepare pieces of the desired length without the participation of the crane, however, it is necessary to pre.set blocks for splitting to a solid surface. The method of cracking with wedges has the form:

• On the line of the cut, 7. 10 deaf holes of the arbitrary diameter to a depth of 5. 7 cm are created;
• They simultaneously install wedges sharpened from scraps of metal rolling;
• alternately diving all the wedges created a single crack along the cut line and the concrete product is split into two pieces.

Folk technology for cracking a concrete beam with wedges.

Another option requires more time, so it is used less often:

• holes are made on three available facets (top and two side sides), but already with a diameter of 10. 20 mm;
• They score wooden crap from dry boards;
• Then it is abundantly moistened with water to expand wood, which splits FBS.

In construction stores, you can find (very rarely) unexplored mixture with the ability of self-expanding HC-1M. It is poured into deaf holes, after which, it becomes an impromptu wedge, split, not only concrete, but also any breeds of natural stone, for which this substance was invented.

In place of the chip, there were traces of the holes in which the iv-1m liquid was flooded.

Important! The last two ways is easier to purse several pieces from one FBS. However, you will have to take them for installation with a special capture, which not every crane operator has.

Thus, one FBS into pieces of the required length can be divided in several ways. The choice depends on the construction budget, the number of auxiliary workers and weather factors.

In what ways can you break or saw a concrete block with your own hands?

During construction, situations arise when it is necessary to cut the material for its further use as intended. At first glance it seems that cutting a concrete block is easy, but this is not so.

Compared to foam concrete, aerated concrete and other porous and lightweight materials, the concrete block is very strong and rarely lends itself to light cut.

Before proceeding to the section, it is recommended to familiarize yourself with how to do it better.

When it may be required to cut or cut?

Concrete blocks are produced in standard sizes and the building materials market rarely concentrates attention on selling something not standard.

In the construction process, the master understands that it is required to find such a block that could finish the masonry in a certain place, while the standard material here will not work. In such a situation, you have to resort to a cut of block concrete material.

If concrete blocks of non.standard size are necessary in large quantities, then it is better to cast them yourself using homemade forms. You can also order non-standard blocks from the manufacturer, but this will cost more.

Often, the builder may need half or a quarter from a whole concrete unit. Then it is necessary to make a cut.

Similar situations often happen when pouring a strip foundation, when all blocks should be of the same size, and when it is completed, several elements are not enough for its arrangement. The same situation may arise during the construction of the building according to the established project, when the wall thickness is already clearly spelled out and it is impossible to retreat from the values.

Often, when laying the corners, it is not possible to correctly enter the concrete block and the cracks between the stones remain. Many builders fill them with fragments of the material, which is also not completely true. In this case, it is recommended to pay attention to the tools and methods that can quickly and easily cut the concrete block material.

At the moment, by experimental experiments, several methods of cutting a concrete block have been established. This includes a manual method where you can use an angular grinder, wedges, codes, as well as a method in which specialized technology is used. Each of the methods requires a detailed consideration.

Manual method

The use of the manual method of sawing involves the absence of automated equipment, the master will have to cut the block with his own hands.

It is impossible to break or split even the most lightweight concrete block. The material has a good margin of strength, so you can not do without the use of auxiliary tools.

The manual method is chosen when the entrance of special equipment to the site is impossible due to obstacles. This technique is also suitable if it is necessary to cut a small amount of block material and call the team of workers with equipment costly and does not make sense.

Creaming a corner grinder

The first and most relevant method is working with a corner grinder. It is known that with the help of this tool you can easily cut foam concrete, aerated concrete and other light materials.

But whether the corner grinder will cope with the concrete block? To do this, you need to choose a powerful power tool. it must be completely serviceable.

Before starting work, it is recommended to take care of personal protective equipment.

It is worth buying a gas mask or a respirator in advance, you can use building gloves. The use of glasses will be a mandatory point: fine dust from concrete will fly in all directions and may be in the eye.

You need to choose a good cutting disk for a corner grinder. Since concrete is considered a strong material, it is difficult to work with it. For the saw, it is better to use a diamond disk. They are segmented, continuous and combined.

The segment is not suitable for such a durable material, and is continuous heated during the cut and it should be watered with water. It is better to purchase a combined diamond disk for a concrete unit cut.

It is important to find out if there are reinforced rods in the concrete block. If the cutter of the disk stumbles on them during operation, a failure may occur. Therefore, it is better to choose turbocharged discs if the thickness of the block is more than 10 cm.

When all the tools are ready, you can start work:

• Marking. Before making a cut, it is necessary to make a line of the line where the cut will pass. It is better to do this with a contrasting marker, so that even with glasses the master can be seen for a trimmer. So that the trimmer fishing line is perfectly even, along it you can put a wooden block.
• Incision. After turning on the corner grinder, it is necessary to make a cut with a depth of 0.5-1 cm.
• Cut. After that, the bar is removed and begin to carry out a cutting disk deeper. So far, it is not possible to completely cut the concrete block. If the tool is heated a lot, it is necessary to make stops and breaks for several minutes. Most likely, the cutting disk will also heat up: it can be periodically watered with cold water with a thin stream.

The advantage of this method is speed and minimum of effort, as well as the ability to cut even those blocks inside which there are reinforcement from metal.

The split with wedges

You can cut a foundation or wall block made of concrete using a split with wedges.

This method allows you not to hire specialized equipment and do it on your own, while saving money.

But there are disadvantages. the method is less accurate, and if technology is not observed, the unit is split diagonally.

In this case, the concrete block will become unsuitable for the goals of the master and will have to use another raw material.

To split with wedges, you need to prepare:

At the first stage, builders make markings, and it is necessary to do it along all the faces of the construction unit, regardless of its thickness. The marking should be clear, so it is best to use a ruler or a special long square.

Further, the peorator is taken for business: with this electrical tool, it is necessary to drill 7-10 holes along the marked line. You can only mark it on the side that is available, if possible, you can mark all sides.

What tools are required?

Stenore machines

Units of this type are an excellent tool for cutting concrete structures. The machine is equipped with mounting and rails to move the saw, so it perform a large amount of work without rest. In addition, the use of such a mechanism has the following advantages:

• increase in the depth of the opening to 7.5 cm;
• performing complex work in large volume;
• low level of vibration and noise;
• the possibility of fixing the machine;
• Diamond cutting of reinforced concrete as soon as possible.

When cutting on such a machine, training courses take place and provide access to the 380 W network.

Manual equipment

Common among builders, a tool with a large size range.

Corner grinder for cutting concrete of this type has interchangeable discs, which are attached to the unit using a screw device. The construction market presents a wide selection of equipment of various sizes and capacities. The depth of the cut opening reaches 13 cm. The hand cutter is easy to move from place to place and cut in hard.to.reach places. The disadvantages of such an apparatus include the application of great efforts on the part of the workers, which reduces the volume and time of the continuous process.

Cutting with a rope

Such equipment is most often used at large construction projects, as it has a high cost. The cutting device is a rope with diamond spraying, which cuts concrete in any direction. Using this equipment, concrete is most often dismantled on bridges, berths, columns or other large objects. The advantage of the cable cutter is power from a hydraulic or electric drive, which makes it possible to use the unit in places without access of electricity. The depth of the holes that the diamond rope makes reaches half a meter.

The work of a corner grinder

Depending on the type of material, the worker selects the appropriate cutting circle.

The tool is popular and necessary in each household. The corner grinder on concrete cuts material with a depth of 15 cm, and when accessing both sides of the structure, the thickness of the wall that it cuts increases by 2 times. The device is quite mobile, therefore it provides access even in hard.to.reach areas. When cutting reinforced concrete structures, it is better to choose a saw without cloves, as they cling to the metal, and the cutting element will be damaged. For ordinary concrete, gear discs are also suitable.

Schwonareschiki

A similar device is designed for cutting seams on a horizontal plane. Professional technology also has disadvantages. First of all, this is the high cost of tools and labor. The device is equipped with an engine and a cutting element, which with the help of wheels easily move along the floor. Depending on the thickness of the floors, such types of sutures are used:

Cutting with a diamond saw

The device has autonomous power and provides operation without dust.

Diamond cutting of concrete is often carried out at objects where there is no access to electricity. In such cases, benzores. The saw is easy to operate and makes the cuts at right angles. The appearance is similar to a wooden chain, but the chain is distinguished by the complexity of the tires that are equipped with water tubules. This allows you to perform cuts without dust. Ease of operation allows you to use equipment without special training, so a saw for cutting concrete of this type is used in the construction of it with your own hands.

How to cut?

To destroy large objects, hydraulic boards are used, which are attached to the arrow of the lifting crane. Dismantling is performed without shock vibrations, which provides a compressive ability of cutters.

The choice of tools is an important process when cutting concrete, so before that they study the object. An important role is played by the thickness of the wall, access to electricity and water. To cut concrete with a corner grinder, they correctly adhere to such recommendations:

• Big fraction of concrete filler slows cutting.
• Small units have low power, so they are not used for complex tasks.
• The choice of disk also depends on the age of concrete.
• When performing the repair, put a protective mask and gloves.
• Cutting concrete without noise and dust is carried out using units for wet cutting.
• To accelerate the cooling of the disk during a break, it is recommended to pull it out.

Brief conclusion

To carry out concrete cutting at home, manual corner grinding and chainsaws are perfect. If the construction volume is large, it is recommended to use professional equipment. If there is no way to buy such tools, they are rented. At the same time, they hire a specially trained employee, since such machines require the presence of the skills of using the unit.

Manual method (without the use of special equipment)

It is impossible to mount even the most lightweight FBS block manually, so the owner of the real estate under construction should use the crane. In this case, the stay of special equipment at the facility is limited, therefore, to reduce the construction budget, all operations should be performed manually. Thus, two “arched” technologies are often used:

Due to this, it is possible to create pieces of the required length without the use of a crane. However, it is required to put blocks for cracking on a solid surface in advance.

The method of cracking with wedges consists of several steps:

• From the cut, from seven to ten deaf holes of arbitrary diameter to a depth of 5 to 7 centimeters are made.
• They simultaneously install wedges sharpened from scraps of metal rolling.
• Due to the alternate immersion of the wedges, a single crack is created along the line of the edge, due to which the foundation block is split into two pieces.

The second option will take more time, so it is more rarely used:

• Making holes on three available faces (top and two side sides), however with a diameter of 10 to 20 millimeters.
• They clog wooden crap from dry boards.
• After that, they are abundantly moistened with water to expand the wood, which provides the split of the block.

Finally, in some cases, in construction stores you can find an unexplored mixture that is able to self.expand. It is poured into deaf holes, and then becomes an impromptu wedge. She is able to split not only concrete, but also any other breeds of natural stone.

The last two methods allow you to cut several pieces from one foundation block. Nevertheless, you will have to take them for installation using a special capture, which is a greater deficiency and far from every crane operator.

As you can see, there are several ways to divide the foundation blocks into parts. The choice of one or another option is dictated by the construction budget and the number of auxiliary workers.

How and how to cut concrete?

Concrete cutting. an operation that is widely used at any stages of construction, repair work. Different equipment for cutting concrete is used depending on the features of structures, the age of the material and the conditions of work. The variety of tools allows you to quickly solve any problems of cutting concrete, including when accurate neat figure cuts are required and it is necessary to minimize the amount of dust, construction waste.

Types of tools and characteristics

The necessary effectiveness is achieved by the use of diamond cutting technology. High.quality cutting is also carried out by the available lasers. Rail, mobile, portable and stationary tools belongs to types of technology in which diamond cuts. This equipment has electric, gasoline, diesel, pneumatic and hydraulic drives. Its working parts have various designs, diameters and types, however, the coating of various resistance includes diamonds. The depth of cutting, concrete strength and the presence of reinforcement in a specific design predetermine whether handmade technique will be used or a more powerful machine is needed. The resistance of the material warms up the cutting (drilling) parts, so they need to cool with water, air. The crumb of diamonds is attached to the cutting surface of the disks by attacking (for wet cutting) and welding it with a laser to the surface (for dry cutting).

Sutures

Electric carrier for standard concrete.

The sutures cutter are usually used to form sawdust in the concrete in a horizontal plane (road, runway and landing stripes, etc.). Cutting depth can be up to 60 cm. The design consists of a supporting frame and a drive unit associated through a belt transmission with a cutting tool, which has a function of regulating the depth of cut. The technology of wet cutting is implemented by supplying water from the tank to the place of work, but there are modifications without it. Electric carrier is manual or self.propelled. The latter (it uses a gasoline drive). is much more powerful, used in conditions of high humidity and in the absence of electric gas. Self.propelled diesel equipment is the most overall, and is designed for prolonged continuous use. The power of the devices and the speed of rotation of the diamond disks allow you to cut both non.targeted and reinforced material.

Stenore machines

The anger.cutting machine carries out the exact cutting of concrete walls, blocks in all planes, both in the air and under water. It has a low level of noise and high performance. Such a cutter makes a cut up to 0.9 m deep. Its design is based on a strong frame on which a transmission and a segmented cutting disc are installed. The equipment moves along the guide rail (mounted on the wall) and has a smooth speed controller. Spent material and excess heat from the disk removes running water supplied at a speed of 10 l/min. A device that sucks and diverts used water from the cutting area can also be installed. Electric models operate on a three.phase network, in powerful equipment, oil stations connected to hydraulics are used.

Laser equipment

Concrete laser cutting has become available not so long ago. Such a tool for cutting concrete allows you to cut, cut off, cut a massif of partitions and walls up to 70 mm thick. Powerful gas-discharge CO2-lasers in mobile (portable) design, deployment time-tens of minutes are already used. Devices capacity. from 0.1 to 45 kW. The seams have a width of 0.05. 1 mm at the speed of the laser head up to 1 meter per minute. Laser technique is beneficial to the possibility of economical formation of complex cuts of absolutely any shape with minimal errors, including inaccessible places. The seams have an ideal surface, the laser does not deform the structures of the walls (local high.temperature effect), does not create noise, has several operating modes.

Hand tools

There is equipment that allows you to cut concrete with your own hands. Corner grinder help cutting in dry and wet modes, which involves the use of appropriate types and modifications of disks (turbotalmas, endless, segmented) with a diameter of 0.2. 0.8 m. Such a tool requires cooling with water (air). For cutting to a depth of more than 0.1 and up to 0.16 meters, an electric, pneumatic or hydraulic cutter is already necessary. a disc saw. The cutter can have a gasoline drive, which makes it more powerful, but creates exhaust gases. Hydraulic technique has the greatest performance and durability. With a mass of about 8 kg, it makes cuts up to 26 cm deep. Instrumental preparation of holes is carried out by peorators using a diamond crown. With similar powerful tools with their own hands, holes are drilled with a diameter up to 45 cm (carbide crown). You can also cut off fragments of walls with a chainsaw in concrete. It will provide filigree cut the desired shape. A manual saw has a cutter cooled by water, which is formed by a metal chain with spraying (diamond). Such a saw is effectively used when working with non.reinforced or poorly reinforced material. A drive that provides the depth of cutting of the joints up to 50 cm can be with a gasoline engine or eat from the mains.

Cutting with a rope

Sharp large.sized walls, structures are also engaged in equipment, an active element of which is a rope with uniformly distributed segments from grains of diamonds. Such a tool can cover up to 10 m2 of the area of ​​the future cut. The product includes a power plant cutting a metal cable, a pulley (creates movement) and removal rollers (form the shape of a sawdrop). The installation drive is powered by a three.phase network or is a hydraulic. Before starting work, the hole of the desired diameter is drilled in the design, the rope is pulled into it. Closed cable contour joins the pulley. The supplied water releases the working area from the developed material and cools the tool.

Effective methods for destroying concrete

It is advisable to beat off a manually not thick foundation made of concrete, stone or brick. The main secret when dismantling is to get into a construction seam. But if you need to recapture the concrete block, it is better to pre.drill several holes around the perimeter using a peorator. Professionals warn that the described method will require a lot of effort and time. However, this is one of the cheapest and simplest ways.

• excavator with a set of hydraulic attachment equipment, a car crane;
• hydraulic wedge;
• ultrasonic emitter;
• Drill with diamond harsh.

The rental of equipment will allow you to cope many times faster with strong views of the foundation: reinforced and pile. The material can not only be gathered, but get the right geometric forms that can be used in the future for the construction of a fence or laying a new foundation. Diamond tools deserve special attention. Used to cut the surface of any thickness and strength, and in order to destroy a large piece of concrete structure, a drill with a diamond rope is used.

The use of chemical compositions

You will need: finely dispersed powders of brands NRV-80, HP 10. The powders dissolve in water mixed in the proportion indicated by the manufacturer, and poured into previously drilled holes to the edges, after a while the concrete is easily broken. A significant advantage is the fact that the use of funds is effective under cramped conditions, there is also no noise when dismantling, and garbage is not formed. The active substances of this chemical when contacting water increase several times, which leads to the destruction of the foundation. Often, when using this method, the chemical breaks the concrete itself during the day, without the use of additional materials: scrap, sledgehammer.

A solution prepared from this powder without noise and dust will destroy the desired structure.

If the wall temperature is high, then the water added to the powder should be colder.

How to cut a concrete block

During the construction process, the question often arises: how to cut a concrete block? At first glance, this task seems impossible, but from our material you will learn about the methods of cutting and tools.

Usually, concrete blocks are produced in standard sizes, excluding features for each specific consumer. Therefore, the problem of adjusting sizes is very relevant.

The work of scrap in this case will not give the necessary accuracy. cutting is more preferable using special tools and machines. Of course, such work is better not to be done in the room, but in the open air.

Firstly, you will not have a problem with transporting heavy and overall material, and secondly, concrete dust in a closed space can harm your health.

For cutting concrete blocks, you can use a stone.cutting saw (by concrete) or a cutting machine with a table and a saw with a diameter of 350 mm.

Stationary machines for cutting stone have the following characteristics: cut depth-65-130 mm; cut length-500-850 mm; shaft rotation frequency-1000-2800 revolutions per minute; cutting angle-up to 45 degrees; machine for cutting concretecom The convenience of cutting concrete blocks includes: an accurate swinging head, side and corner stops, a rubberized table, a water pump, mudguards. The weight of the machines reaches 50-300 kg.Concrete chain saws are used in hard.to.reach places. They are much lighter and mobile than machine tools.The technical parameters of these tools are as follows: engine power-up to 4 kW; rotation frequency-2700 revolutions per minute; cut depth-150 mm; saw weight varies within 10-12 kg.Case on stone look like ordinary hacksaws. The difference lies in the glued teeth, which have large sizes (1.2 inch).

For this purpose, both machines and chain saws are used:- to prevent dust sticking on concrete blocks, moisten the saw canvas;- draw a fishing line for a trimmer cut with chalk;- make a cut;- then rinse and clean the dirt and clean the dirt and clean the mud and clean it slum deposition from the front surface of the blocks;- before laying, give the concrete block to dry.

Do.it.yourself column foundation. technology, instructions

A columnar foundation of concrete blocks is a rapidly built design that is perfect if it is planned to build a light one.story building. Many choose this particular option, due to the fact that for the construction of the support it is not necessary to spend a lot of efforts, as well as material means.

Consider the types of blocks, their purpose, as well as the procedure for performing work. Information is useful to those who intend to independently build a house on the basis of a columnar foundation from blocks, or want to control the process on the construction site and keep abreast of how all work is performed.

Scope of materials

Mostly use this technology in private construction. It is worth noting that the foundation of this plan does not differ in high bearing capacity, its life is limited. Therefore, if there are plans to build a building that will serve your great.grandchildren, it is better not to resort to such solutions.

If the soil is not abutable, then in this case you can build a column foundation from blocks for building a bath, everyday life, or one.story, light house. The size of the blocks in each case is determined individually.

If it is planned to build in the region with boulder, rocky, gravel soils, then in this case the bearing characteristics of the FBS (foundation block of the wall) will be quite enough to build a house from foam concrete, log house.

Please note: the foundation of concrete blocks is not intended for the improvement of basements. If this nuance matters, in this case, it is better to revise other foundation options.

The optimal depth of blocking blocks is 1 meter. It is worth noting right away that the performance of work at a depth of one meter is a laborious, energy.consuming process that does not justify itself.

It is undesirable to use a column foundation consisting of blocks, in the following cases:

• If it is planned to build heavy construction (using reinforced concrete or brick).
• On moisture.saturated, clay soils. They are unreliable.
• On unstable soils. This is due to the fact that the pillars do not have high resistance to displacement loads.
• If the construction site has changes in a height of 1 meter (the soil must be previously leveled).

Block base: Features

Consider what factors a strong.column foundation made of concrete blocks may be interested in:

• If the work is performed by an experienced, qualified specialist, then you can build the base within a few days. Undoubtedly, this is a significant advantage, since this is how it can be significantly reduced by the time of work.
• If it is planned not the global volume of construction work and/or budget size is limited. this is the most optimal option. Work is performed as simple as possible, easier not to find the method. Therefore, many are happy to use this technique if it is necessary to build a light structure of wooden (for example) materials within a couple of days. Roughly speaking, you will have to spend approximately 3 thousand if the column foundation from the blocks is made with your own hands.

If summarized, then the given option is as simple as possible, budget, does not require large time.

Important: if you decide to create a block base yourself, it will be much easier to make it if there are already practical skills in working with a brick or cinder block.

Construction: current information

To build the base, as a rule, use monolithic stones. The most optimal option is to buy ready.made material cast on a vibroan. It has an acceptable cost, so this decision will not make gaps in the general budget.

Blocks with dimensions 20×20 and 40 cm long are most often used. This is due to the following factors:

• Since the block is small, it has a small mass. Depending on which filler in the material, one unit can weigh within 30-32 kg. Thanks to this, you can not use special equipment. The moment is important for people who are interested in the independent installation of the foundation.
• Protection on vibropresses are made. As a result, the block is cast, which means that it will have high strength.

It can be safely called these proportions successful. without any problems, you can fold a column of the base, as well as leve a plane, while you will not need to cut the top of the support.

Important: When buying building materials, it is advisable to check each block with a template. This is due to the fact that there are prefabricated parties on sale (they are made on different forms), therefore, the size may differ.

Concrete blocks: varieties

As intended, building materials can be divided into two groups:

• Pillow. They are used to lay the lower row of the base. Of course, it is better to buy ready.made materials from a trusted manufacturer. All the strength of the structure will depend on the strength of the pillow unit. Since they are expanded below, the support area increases, therefore, the bearing capacity of the foundation also increases.
• Wall. They have the form of a parallelepiped. The cross section of the product forms a rectangle. They are usually used to form a building base, but in some cases they are also used to create support pillars.

Reviews of people who were engaged in the arrangement of the base say that with the correct performance of work using wall and pillow blocks, you can ultimately get a strong, durable foundation.

It is worth noting that not all varieties of blocks in the construction of the base can be used. For example, arbolite materials are not suitable, since they have a very small bearing capacity.

Expanded clay concrete is a material that absorbs moisture very well. If you decide to use this particular material, in this case you should think about high.quality and reliable waterproofing.

The sequence of work

Consider step by step in what order all work needs to be done. Information will be relevant both for people who have decided to build the foundation on their own, and for those who seek to know everything about the correct arrangement of the basis for light buildings.

Features of work with corner grinding

Corner grinder for cutting concrete is an indispensable tool, but it can cause injuries. This requires when working with equipment to comply with operating rules.

• Work should be carried out only in sober form and with good health;
• Before starting work, it is recommended to prepare such devices and protective equipment:

• Face mask or glasses to prevent hit in the face, and especially in the eyes of sparks;
• Vacuum cleaner or respirator;
• Gloves, better dense or glow from genuine leather;
• Protective clothes that cover all parts of the body;
• Nozzles that allow the use of the instructions for the equipment;
• Headphones.

• A casing that is installed between the tool and the person.

All these items will protect the worker when cutting concrete.

The choice of equipment

Correctly selected equipment. the key to high.quality and long.term operation of the tool. When acquiring it, it is necessary to pay attention to such basic parameters as: power and diameter of the cutting circle.

Tip: often buyers are afraid to purchase high.power models. But this is absolutely wrong! It should be borne in mind that a car with slight power can jam disks. the device does not have enough strength to pull it out.

For beginners, you should purchase a tool with such characteristics:

Equipment with such technical characteristics may well saw iron. If the selected model is suitable for technical characteristics, but it is inconvenient to use it during work, it is worth giving preference to another option.

Types of tools for cutting concrete

For cutting concrete, diamond circles are used, their main sizes:

• The outer diameter of the disks, within 100. 600 mm;
• Thickness, within 0.4. 3.5 mm;
• The diameter of the landing hole is more than 15 mm, the diameter of 22.23 mm is considered optimal.

Diamond circles differ in other indicators.

The last two characteristics are the main ones in the classification of the tool.

The table contains diamond discs of different configurations of the working edges:

Based on the technology of applying spraying, circles are distinguished:

• With an attack in which there is a silver solder, they are used only for wet processing of a concrete surface;
• With laser welding. These are the most durable and durable discs that withstand dry cutting. Such a diamond disk for concrete for corner grinders is most often used for cutting reinforced concrete;
• With special compounds coated, which are then exposed to high temperatures. These are universal discs with averaged characteristics.

Circles also differ in the degree of concentration of spraying, which in high.quality tools reaches more than 30%, and abrasive crumbs are distributed throughout the volume of cloves and grooves. With this performance, the resource of the circle service is significantly increased, when it grows, new layers for cutting the material are opened.

Tip: when choosing a circle for cutting concrete, you should take into account all the above characteristics of the tool.

Determination of the type of concrete

Before cutting the angular grinding of concrete, you need to determine its type. The choice of the type of diamond disk depends on this.

• At a cut depth of about 100 mm and deeper, a metal lattice or reinforcing cage can be located. For these purposes there are special discs;
• It is necessary to take into account the change in the structure of the material. Fresh concrete is more abrasive, and the old has great hardness. Because of this, diamond circles for fresh and old materials should be different;
• There are different concrete reinforcement schemes;
• If there is an opportunity, it is worth studying in more detail the structure of the material, this will allow you to purchase the most suitable circle for cutting. Materials such as basalt or quartz will quickly dull the edges of the tool. In this case, diamond segments are selected with tied soft material, while new diamonds will become faster to “open”;
• The speed of the filler affects the speed of cutting. the larger it is, the more slowly the work.

With household processing, manual tools for cutting concrete are most often used. As a rule, the masters adapt to the problem to solve the usual corner grinder (angular grinding machine). In order for the tool to give the expected effect, it is necessary to use nozzles that can violate the structure of solid stone:

How and what is better to cut. the main methods

At the moment, by experimental experiments, several methods of cutting a concrete block have been established. This includes a manual method where you can use an angular grinder, wedges, codes, as well as a method in which specialized technology is used. Each of the methods requires a detailed consideration.

Manual method

The use of the manual method of sawing involves the absence of automated equipment, the master will have to cut the block with his own hands.

To do this, use it:

It is impossible to break or split even the most lightweight concrete block. The material has a good margin of strength, so you can not do without the use of auxiliary tools.

The manual method is chosen when the entrance of special equipment to the site is impossible due to obstacles. This technique is also suitable if it is necessary to cut a small amount of block material and call the team of workers with equipment costly and does not make sense.

Creaming a corner grinder

The first and most relevant method is working with a corner grinder. It is known that with the help of this tool you can easily cut foam concrete, aerated concrete and other light materials. But whether the corner grinder will cope with the concrete block? To do this, you need to choose a powerful power tool. it must be completely serviceable.

Before starting work, it is recommended to take care of personal protective equipment.

It is worth buying a gas mask or a respirator in advance, you can use building gloves. The use of glasses will be a mandatory point: fine dust from concrete will fly in all directions and may be in the eye.

You need to choose a good cutting disk for a corner grinder. Since concrete is considered a strong material, it is difficult to work with it. For the saw, it is better to use a diamond disk. They are segmented, continuous and combined.

The segment is not suitable for such a durable material, and is continuous heated during the cut and it should be watered with water. It is better to purchase a combined diamond disk for a concrete unit cut.

It is important to find out if there are reinforced rods in the concrete block. If the cutter of the disk stumbles on them during operation, a failure may occur. Therefore, it is better to choose turbocharged discs if the thickness of the block is more than 10 cm.

When all the tools are ready, you can start work:

• Marking. Before making a cut, it is necessary to make a line of the line where the cut will pass. It is better to do this with a contrasting marker, so that even with glasses the master can be seen for a trimmer. So that the trimmer fishing line is perfectly even, along it you can put a wooden block.
• Incision. After turning on the corner grinder, it is necessary to make a cut with a depth of 0.5-1 cm.
• Cut. After that, the bar is removed and begin to carry out a cutting disk deeper. So far, it is not possible to completely cut the concrete block. If the tool is heated a lot, it is necessary to make stops and breaks for several minutes. Most likely, the cutting disk will also heat up: it can be periodically watered with cold water with a thin stream.

The advantage of this method is speed and minimum of effort, as well as the ability to cut even those blocks inside which there are reinforcement from metal.

Cutting concrete. 8 Ways to cut concrete

The need for concrete cutting can occur in almost any construction. It can be both a small home change in the configuration of openings, and a large.scale construction of bridges and tunnels. For this purpose, a wide variety of tools of different ways and power of the tool is used.

Concrete cutting is one of the main stages of creating door and window openings in the wall.

Any cutting of concrete is inextricably linked with operations such as:

All of them can act as an addition or part of the main technological process. In this case, I distinguish between two main methods of cutting: a) dry; b) wet.

The last method is the most technologically correct. When it is used at the place of friction of the tool and material, a stream of water is served, the tasks of which: a) cool the cutting component; b) upset dust; c) increase cutting efficiency; d) allow to continuously conduct work and increase their safety.

However, there is no possibility of supplying water due to its absence. There are frequent cases when water can cause damage to the tool. For these reasons, cutting “on dry” may be applied. It is somewhat different in that work needs to be carried out with interruptions, allowing the cutting elements to cool. High dustiness forces the use of either dusting devices or interrupt the process to longer ones than it is necessary to cool the tools. Since in closed rooms due to dust there will simply not be visible the cutting place and there is a risk of error when performing work.

When performing dry cutting, it is allowed to immerse the edge of the cutting disk to a small depth, since the large lateral friction warms the tool and can cause its failure. To perform deep cuts, you need to make several lateral recesses and gradually expand them to get a free channel to access the point of influence on concrete.

Features of the collection of tools for cutting concrete

Starting to cut concrete, it is necessary to carefully study it from all sides. What you need to pay attention to for the correct selection of the tool?

First, on the structure of the material. Old concrete is much stronger than young. Age can be determined by the appearance of the entire structure or product.

Secondly, on the composition of concrete. The most important component of any concrete is its filler. It can be expanded clay, granite, sandstone and other materials. The stronger the filler, the higher its component with the total mass of concrete, the more difficult it is to cut concrete. You should also pay attention to the granularity of the sand. Small washed sand makes the structure of all material denser. On the contrary, large sand from rocky breeds is cut easier. All this is possible to determine visually, the lead with a pick or drill a piece of concrete from the main monolith.

Thirdly, for the thickness and location of the material. The flooded screed and the wall are cut by various devices, although they can have the same density and thickness of concrete. In this case, small sections of cuts can be performed with a manual tool. Large, where it is necessary to perform work not only in large volume, but also with a significant degree of accuracy, are carried out by special professional equipment.

Differences in concrete cutting by type of tool used

Concrete cutting has differences in the type of equipment used in this case, the choice of which will depend on many factors, the main of which are listed above.

Hand cutters

Most of the operations are carried out by a manual tool, which is popularly called “corner grinder”. Its correct name is an angular grinding machine or an abbreviated angular grinder. They are produced by various capacities and under the different sizes of nozzles that are attached to them using a screw thread. To cut concrete use:

And also differ along the edge of the cutting edge, which can have even and with transverse cuts, which contribute to the cooling of the disk during operation. The denser the concrete, the smaller the grain of diamond needs to be chosen, and preference to cuts with cutouts, but which is not recommended to be used when cutting reinforced concrete, as the recesses can cling to the metal rods of the reinforcement, which may lead to an employee’s injury.

The advantages of manual cutting include high maneuverability of operations, the simplicity of their implementation in small volumes.

The disadvantages are that with sufficient volumes, the worker can quickly get tired. The accuracy of manual execution of the process can be achieved only in small areas. The need to take into account the human factor does not make it possible to perform round.the.hour and continuous multi.hour work. The factor of harmfulness for the health of the Contractor also plays.

Therefore, if work is carried out by professional organizations, it is advisable to perform them using special machines.

Stenore machines

The use of these mechanisms is used to perform work on cutting openings, deep stroke and separation of thick layers of concrete. Devices for wall cutting are similar to the corner grinder, only large. In their design, such mechanisms have, in addition to the cutting unit, devices for attaching the entire structure to the wall.

The machine is attached to the surface that will cut on the rails. On them she will move back and forth during the entire process. Disks for such mechanisms are used by the size of more than 25 cm in diameter.

Asterase car. The cutting part moves along a special guide.

Water is supplied to the cut site through the hose system.

Advantages of using such machines: a) saving money and time; b) a small noise level; c) high power; d) small noise of work; e) relative cleanliness of the process; f) small vibration, which is important for the further integrity of the surface; g) reliable mount to the surface.

The disadvantages can sometimes be attributed to a fairly high price of such equipment, as a result of which, not always available accessibility.

Strengthening the opening

After cutting the opening or expanding it, it is necessary to strengthen the walls with additional metal structure. There are such types of strengthening the openings:

• One.row. strengthening is performed using a channel. A P-shaped frame around the opening is performed. In such designs, different types of channels and methods of attachment to the wall can be used. Places where the channel does not adjoin the wall is filled with a solution.
• Corner. finishing the corners on both sides of the wall is carried out, the corners are fastened together with hairpins, metal plates. Such designs are most often used.
• Combined. a channel and corners are used to strengthen.

Coordination of openings in the bearing walls

The device or expansion of the opening should take place in accordance with all norms, with the permission of the relevant authorities. When a redevelopment decision is made, different indicators are taken into account:

• the floor on which the redevelopment is carried out (the higher the floor, the less the load on the wall);
• year of building a house;
• the width of the opening and its placement (joints of the plates, distance to the outer walls);
• The condition of the walls in the room.

The redevelopment can be carried out by organizations with permission to perform such work. Recently, people are increasingly making buildings redevelopment, expanding old openings in the walls, and equip new. Diamond cutting. leader of the dismantling robot. With the help of cutting elements, concrete more than 60 cm thick is cut. Hydrobrase cutting method is the most environmentally friendly and safe.Oxygen-cocked drilling is effective, but requires certain preparation and skills, there is a risk of burn.

Depending on the thickness of the walls, the desired result, everyone can choose the right cutting method. But it is important to remember that the changes in the supporting walls must be calculated and agreed in the appropriate authorities, the openings are strengthened.