How to saw concrete without dust
When you use an angle grinder to cut concrete, you are inevitably faced with huge puffs of dust, which creates a cutting tool. Thick mineral dust not only interferes with the work process, but can also pose a threat to the foreman. You have to wear safety glasses, of course, but even so, the dust is a serious problem that you have to get rid of. In this article, the master plumber will tell you how to angle grinder saw concrete without dust.
Concrete is a strong material, so it is quite difficult to work with it. To do the cutting, an angle grinder (angle grinder) is most commonly used. This tool is more commonly known as “angle grinder.
A diamond wheel is used as a cutting head. Depending on the design features, they are divided into several varieties:
The first option is a solid base with a segmented edge. Such a circle is low cost, but not very suitable for working with strong materials. You should also take into account that it is used only for dry cutting. The solid disc has a continuous diamond edge, which prevents chipping during operation. This accessory heats up quickly and must therefore be cooled with a continuous stream of water. Combination or turbo-diamond disc is universal. It can withstand maximum loads, and is even suitable for cutting reinforced concrete.
Before buying a tool of a required type it is necessary to understand the material to be worked with. Reinforced concrete is reinforced with metal bars that the cutter can bump into in the process. Therefore, if you intend to deepen more than 10 cm, you should use high-strength discs, i.e. turbine discs. 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.
The segments of the disc are attached to the blade either by silver brazing or laser welding. The first variant is more suitable for wet cutting, the second is used only for dry cutting. When selecting a suitable diamond wheel, attention must also be paid to its diameter, which must match the parameters of the angle grinder. The speed of the disc 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”. It will give you the best possible working conditions.
Using water allows you to cut concrete with an “angle grinder” without dust or overheating the tool. The technology allows you to solve several problems at the same time:
One way to get uninterrupted water flow is to attach a hose in such a way that the liquid gets on the wheel. If there is no running water in the work area, an assistant can be involved in the process. He uses a primitive device made of a plastic bottle to wet the wheel. At the same time, the liquid is wetting the place of the cut. This must be done carefully so that water does not get into the tool.
The method is not very applicable in high-rise 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 cleanerTo get rid of small particles of material formed in the process of cutting “angle grinder” allow angle grinder with built-in vacuum cleaner. But what to do if there is a need to saw concrete with an ordinary tool without additional options? The easiest solution is to buy the cleaner cover separately or make it yourself.What you will need: a hinge, 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 each is made in the hinge and shroud.
Drilling the ceiling without dust
Special compressor nozzles for dust-free drilling are put on the working tool (drill, drill bit or peorator) and collect fine particles of sand and cement. Professional craftsmen use factory-made devices with a compressor or a construction vacuum cleaner attachments. They do not allow debris fall to the floor in the process of processing the ceiling, as a result, after the operation the room is still clean.
The easiest, affordable option to carry out work without dust. is wetting. That is, the surface with which you will have to work. brick, concrete, and so on, before the work must be moistened. And there is no need to use something large, bulky, professional. an ordinary sprayer will do for this purpose. In its absence. a plastic bottle with holes made in the lid. Such a device used to water flowers, getting a kind of a watering can. Or even a child’s water gun.
The essence of the method is that it is necessary to produce a sprinkling immediately before the work, so that the dust gets wet and can not fly away. And since man naturally has two hands, he will definitely need a helper. After all, he will work with an angle grinder. Therefore, a tandem of two people for this job is ideal. The only inconvenience: instead of dust there will be a dirty slurry. It is worth remembering.
Wet-cutting technology on concrete
Using water allows you to cut concrete “angle grinder” without dust and overheating the tool. The technology allows you to solve several problems at once:
One way to ensure a continuous supply of water is to attach the hose in such a way that the liquid falls on the disc. If there is no water supply in the working area, an assistant can be involved in the process. He will use a primitive device made of a plastic bottle to wet the disc. At the same time, the liquid moistens the place of the cut. It must be done carefully so that water does not pour into the tool.
The method is not very applicable in high-rise buildings, as there is a risk of flooding the neighbors from below.
Important to know
Modern manufacturers offer a variety of models of equipment, so it’s easy to find a particular model of equipment (as well as companies or specialists who quickly and efficiently perform the work). But there are some details to keep in mind.
- Wall saws are not used in multi-storey houses of panel type because of the risk of flooding the lower floors with water. Also not suitable machine to work in confined spaces, when you need to perform a small amount of cutting.
- To reduce noise, you can cut openings in parts (a minimum of 6 parts). The price of work in such a case increases and depends on the number of pieces to be cut out.
- All openings / apertures in supporting structures are made only by certified companies and in strict compliance with the rules.
- Legalization of hatches / openings in load-bearing walls requires an application to the state authorities with the provision of a full package of documents.
Cutting concrete without dust is a demanding task that can only be accomplished to a limited extent. It is very difficult to get rid of dust completely, but it is possible to significantly reduce its amount through the right choice of equipment and attachments, cutting method, as well as the use of a construction vacuum cleaner and the creation of special devices for collecting dust.
Is there any technology of cutting concrete without noise and dust
Thinking about what to cut the concrete, you need to take care about reducing the amount of dust, which inevitably appears during the process of work. In some cases it is impossible to do anything and you have to work in difficult conditions, but in others it is quite realistic to remove the dust. The most important thing is to follow safety procedures and use proven methods.
Cutting concrete is a purposeful mechanical impact on the monolith with rotating parts of the tool. Cutting is not accompanied by impact noise, but always involves noise from the tool drive motor and the work of its moving parts, which cut a groove in the stone or cut through rebar, cut into pieces, etc.д.
Different methods of cutting concrete. manual, machine, wet and dry. are used. The first two results from the type of tool you have chosen. The wet method uses water on the cutting piece and on the concrete surface itself, the dry method uses no water. Regardless of the cutting method chosen, the amount of dust that accompanies the process is always quite large.
The most common methods of cutting concrete:
- Diamond cutting of partitions and walls with hand tools (angle grinder and others).
- Diamond cutting with a stationary wall saw.
- Diamond cutting with wire cutters.
- Use for wire cutting.
If you use a hand-held tool (most often an angle grinder), you can connect a construction vacuum cleaner to it, which will suck up almost all of the dust from the cutting process. If it is not possible to connect the tool to a vacuum cleaner, everything can be done with your own hands.
What you will need to make an adapter for a construction vacuum cleaner:
- Drainage branch of polypropylene with a diameter of 50 millimeters, under 45 degrees.
- Reinforced tape (it is more reliable).
- High quality masking tape.
The process of making a vacuum cleaner nozzle for dust extraction:
- Place the angle grinder as steadily as possible on the table or floor so that it lies up with the disc parallel to the plane of the base.
- Take the branch with pliers or a clamp, turn on the angle grinder and “cut” the pipe along the body, 3 centimeters under the cover of the tool.
- Screw the outlet to the angle grinder body with reinforced adhesive tape very tightly (a few centimeters) to the saw blade. The nozzle must be securely fastened so that it is fixed in place.
- Put putty tape on the open side of the shell, thus connecting it with the outlet. Then you can connect a construction vacuum cleaner and remove the dust during work.
Such system of the tool design changes does not presuppose any modifications, but before using it, it is desirable to consult the representative of the manufacturer regarding the possibility of making revisions.
Cutting concrete with a hand tool
Not all hand tools are suitable for grass trimmers and lawnmowers, because of the strength of the material. Most often an angle grinder (aka angle grinder, angle grinder) is used for this purpose. For cutting concrete use a special attachment in the form of a diamond wheel, which can be solid, segmented, combined.
Types of diamond wheels for angle grinder with which you can cut concrete:
- Continuous. is made with a continuous diamond cutting edge, so there are no chips in the work. The nozzle heats up periodically, so it requires constant cooling with a jet of water.
- Segmented disk. the base is solid, the edge is segmented. Circle is inexpensive, but it quickly wears out from durable materials. It is used exclusively for cutting by dry method.
- Combination (aka turbo-diamond) disc is regarded as a universal disc, able to withstand maximum loads, even reinforced concrete can be cut with it.
The nozzles are chosen according to the material that is going to be sawn, as well as taking into account the type of work, conditions. Concrete with indentations of more than 10 centimeters can only be cut with discs of higher strength (turbine discs). All disc segments are attached to the blade by laser welding or silver soldering. The first can only be used for dry cutting, the second for wet cutting.
The wheel must be made with an inner diameter corresponding to the diameter of the angle grinder. Disk speed is also important, preferably higher than the speed of the angle grinder. Depending on the chosen type of cutting and the correct selection of the tool, the volume of dust that appears during the work can be different.
For example, if you cut long enough concrete with an insufficiently strong and ineffective tool with nozzles, the dust will be very much, but the result is minimal. You can reduce the amount of dust by using the wet cutting method. water does not overheat the tool and prevents the emergence of dust. This allows the work to be completed more quickly and extends the life of the diamond head.
Water supply can be arranged in different ways. from spraying concrete with a spray gun periodically during the execution of works to fixing the hose to the tool so that the liquid flows in a continuous stream on the drive.
Make a convenient nozzle from an ordinary plastic canister. Also need a cutter, a container of the required size, the nozzle which matches the diameter of the hose vacuum cleaner.
Next, seating holes must be made on both sides to allow the disc to easily change direction. A cut of a suitable size is made under the wheel, and for the installation of the torch, another hole is cut. Carefully connect the hose to the neck of the canister, then fasten the adapter ring with a clamp. Angle grinder is sent to the hood, all elements are securely connected. Cover the opening that is not used.
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