The density of concrete in many respects is very high, which makes it an ideal building material for the construction of walls and ceilings. However, it is very difficult to install fasteners for shelves, chandeliers and other “hinged” interior parts. In this article we will look for a solution to this problem, and the dowel will help with this.
In the photo - a dowel for fastening elements on a concrete surface
Electric concrete mixer: recommendations for selection and operation
At any construction site, one of the main mechanisms is a concrete mixer . This is an integral part of the successful and efficient work of both professionals and amateurs who are just starting to engage in construction on their own. It is the volume of work performed that must be taken into account when purchasing a concrete mixer. Information on how to choose the right tool is contained in this article.
An electric concrete mixer is one of the main mechanisms at any construction site.
Concrete mixer: a machine that facilitates the construction process
A concrete mixer, or concrete mixer, is a special machine for construction work, which is designed for mixing concrete and other solutions used for pouring the foundation, making screeds or brickwork. The device will also be a good help in the process of gluing tiles and when performing other types of construction work.
A concrete mixer is a device for mixing concrete and other solutions.
Externally, a concrete mixer is an open container into the middle of which the components of concrete are poured, that is, cement, sand and water. A component such as gravel may also be present. The machine prepares the solution by stirring. Then it is poured into a separate container using a special mechanism.
The device greatly facilitates, optimizes and speeds up the work process on the construction site. Of course, you can order the solution or prepare it in a trough, stirring with a shovel, but it’s much easier to pour in the ingredients and just press the button. At the same time, not everyone knows which concrete mixer to choose. As a result, during the construction of a small house you can find bulky equipment running idle, or small concrete mixers on huge sites.
There is a wide range of such products on the modern market. At the same time, the models are distinguished by their long service life, ergonomic devices and ease of use. Having decided on the required volume, power and other parameters, you can easily choose the best option.
First of all, you should familiarize yourself with the variety of types of concrete mixers. Devices are classified according to the following criteria:
- according to the operating principle;
- drive type;
- tank capacity;
- power;
- type of food.
Concrete mixers are classified according to their operating principle, drive type and tank capacity.
On a note! The gravity concrete mixer is equipped with special emptying mechanisms, which allows you to simply and quickly remove the solution. In addition, the price of such mixers is significantly lower than the cost of forced-type machines, which mix the solution with fine components more efficiently.
Concrete smoothing tools
There are many trowels for concrete - they differ in type, properties, and functions. Before choosing a tool, you need to decide on the tasks it should perform and the approximate amount of work.
Channel trowel for correcting the surface of freshly laid concrete
Channel type trowels are used for high-quality smoothing and simple correction of the surface of newly poured concrete. The smoothing angle coordination is up to 30 degrees, the covering width is up to 3 meters, the rod length is a maximum of 6 meters.
The channel trowel may include a expansion joint former - a special toothed attachment that divides the surface of the poured mixture into cards (separate sections). Thus, expansion joints are created simultaneously with the final smoothing of the concrete mixture, which reduces the cost of work.
Channel smoothers for concrete are made of special stainless steel or aluminum alloys. The blades are made smooth, with a mirror surface; they must demonstrate a high level of corrosion resistance.
Scraper
The scraper trowel is used to effectively remove cement laitance, eliminate bumps, and fill depressions on the concrete surface. The tool also allows you to control the horizontal level of the floor. The tool is suitable for large areas. The width of the coating that is processed is up to 6 meters, the length of the handle is also 6 meters.
Thanks to the design features, you can smoothly reduce or increase the angle of inclination of the working blade due to easy rotation of the handle, which greatly simplifies the work process. The main advantages of a scraper trowel: a large assortment of blades, durability and structural strength, low weight due to the blade being made of aluminum alloy, a long handle, the ability to process large areas.
Manual rack and pinion
Hand-held concrete trowels are a good choice for small areas. The tool is made with rounded corners of the blade, the handle is attached directly to the working plane. The smoothers are made from aluminum alloys, the blades are mirrored, and the kit usually includes a cable reducer, thanks to which it is possible to change the angle of the blade (up to 60 degrees) when moving forward/backward.
The tool is equipped with telescopic handles, the length of which can reach 12 meters. Maximum processing quality and high productivity can be achieved by moving the device along a concrete screed in directions perpendicular to one another (left/right, forward/backward).
Trowels
Such smoothers are used to treat large areas. Paddle trowels are fully mechanized and can be petrol or electric (the most popular and in demand on the market).
Selecting a power trowel by drive type:
- Electric single-rotor machines - the diameter of the working disk is from 600 to 1200 millimeters, the unit is suitable for indoor use, when processing areas of complex shape, etc. The kit includes: gearbox, electric motor, dolly wheels, handle, packet switch, disk.
- Gasoline - relevant for treating open areas; indoors require a high-quality ventilation system. The machines can be manual (controlled by a handle, can process areas of different configurations), self-propelled (two-rotor, controlled autonomously using hydraulics).
Classification of concrete mixers: photos of different types of machines
Before choosing a concrete mixer, you need to get at least a general idea of the variety of devices. In the last century, a huge number of products were invented for a variety of purposes. The most popular are mobile mechanisms with a small capacity - up to 300 liters.
The main feature that underlies the classification of devices is the principle of operation. This group includes two types of concrete mixers:
- forced type;
- gravitational type.
Forced action devices are equipped with a stationary drum and a mechanism operating on the principle of a mixer. Thus, the ingredients are mixed in the drum. It should be noted that, despite the high-quality preparation of the solution, there are a number of disadvantages, among which are the following:
The operating principle of concrete mixers can be forced or gravitational.
- the difficulty of removing the resulting mixture, although some manufacturers have found a way out of this situation by equipping the concrete mixer with a mechanism for unloading the solution;
- the size of the fractions to be mixed is small, so gravel cannot be added to such devices, and especially large pieces of crushed stone can even damage the machine.
Considering the listed disadvantages, it would be more correct to call this type of concrete mixers mortar mixers.
The gravity concrete mixer is perhaps the most popular among its “brothers”. Consider the design of a concrete mixer. It is a drum that rotates around its own axis, resulting in a high-quality finished mixture. To avoid the influence of the solution on centrifugal forces, the drum is equipped with special blades. According to reviews, a concrete mixer with a gravity mechanism mixes much worse, but construction components of various sizes can be added to such a device.
Characteristics, dimensions
Concrete dowel – dimensions (range of values):
- The diameter of the threaded part is 2.5-7.5 mm.
- Length – 30-200 mm.
The parameters are strictly regulated by GOST standards. At the same time, for effective use in specific conditions, it is necessary to know the following number of technical characteristics of hardware:
- Total length.
- Thread diameter.
- The diameter of the rod without the threaded part.
- Thread pitch.
- Cap dimensions.
- Slot dimensions and geometry.
- Maximum load.
An example of the technical characteristics of a concrete screw Source porta-chel.ru
Choosing the best concrete mixer by drive type: electric, gasoline and diesel devices
Depending on the type of drive, concrete mixers are divided into:
- to electric;
- gasoline;
- diesel
Depending on the type of drive, concrete mixers are divided into electric, gasoline and diesel.
The most popular among this group are electric concrete mixers. In addition, they are less expensive. Such devices are equipped with an electric motor and can be connected to a 220 or 360 V power supply. This factor must be taken into account if only a 220 V power supply is available. The motor on such machines usually has a power of up to 1 kW, which is especially beneficial in terms of electricity consumption.
Gasoline driven concrete mixers are equipped with an internal combustion engine. As a rule, this is a two-stroke engine, and before refueling, engine oil must be added to the fuel. Such a device will be required if you have to work on construction without access to the power grid. First, the gasoline engine is started, then mixing is performed. It is problematic to work with such a machine indoors, as toxic exhaust gases will be released.
On a note! In terms of savings, electric concrete mixers are the most profitable, since gasoline and diesel fuel are much more expensive than electricity. In addition, the electric concrete mixer does not emit smoke, so it can be installed indoors.
A concrete mixer with a diesel engine is more economical in terms of fuel consumption compared to a gasoline mechanism. It should be noted that it is problematic to start a diesel engine in the cold, which precludes the operation of such a device in winter. In addition, equipment with a diesel engine weighs significantly more than a concrete mixer with a small electric motor.
The most popular are electric concrete mixers.
How to drill a wall with a crown
We take a standard diameter of 70 mm, because we are going to drill holes for sockets. The tool should be checked again; there should be no traces of soldering or welding on the crown. If there are any, it will simply be impossible to work, since this is a factory defect. As a tool, we will use the most common hammer drill, with an SDS plus shank.
It is advisable to use a hammer drill with a power of up to 800 watts inclusive; more powerful ones will exert very high pressure on the crown when drilling. And keeping the hammer drill evenly pressed against the wall is very difficult.
We will work exclusively in drilling mode, and not in impact mode. This small nuance must be clarified, otherwise it can easily lead to breakdown. The room in which the repair work will be carried out will be very dusty, and for this you need to buy a spray bottle to humidify the room itself, and not the crown. It is also worth considering the fact that when working with a powerful hammer drill, small fragments will fly in all directions, sometimes they are very sharp, here you need to buy personal eye protection, and take care of work clothes that will cover your arms and legs. Glasses will allow you not only to protect your eyes from unwanted injuries and damage, but also to completely control the entire process, rather than letting the work take its course.
Electric concrete mixer: gravity type mechanism design
Having decided on the type of device (gravity-type electric concrete mixer), you can proceed to choosing a specific concrete mixer model. In this case, it is necessary to pay attention to some parameters.
Construction of a concrete mixer. Here you should consider the ease of use and the ability of the device to perform certain tasks. The volume of the tank plays a decisive role. The choice depends on the amount of solution. A concrete mixer with a capacity of up to 100 liters is suitable for small construction sites, for example, when you need to pour the foundation with a concrete mixer yourself or if you need to build a gazebo. To build a house, you should choose mechanisms with a capacity of 100 to 150 liters, which are designed to prepare 60 or even 100 liters of solution at a time. Products with a tank volume of over 150 liters are professional machines.
The type of electric drive, which determines both the design itself and the type of electric motor installed on the concrete mixer. There are gear and girth drives.
The gearbox for the concrete mixer is located at the bottom of the product along with the engine, which from below ensures the rotation of the drum itself. Such devices are reliable, but they must be handled very carefully, since their cost significantly exceeds the price of crown equipment.
The drive type of the concrete mixer can be geared or crown driven.
The principle of operation of a crown concrete mixer is that, through a belt drive, the engine drives the crown, which rotates the drum itself. In such mechanisms, the belt drive quite often breaks, the crown fails, and other malfunctions may also occur. It should be noted that spare parts for such concrete mixers are inexpensive and you can replace them yourself.
Device, purpose
A dowel is essentially a screw for concrete. It is made of high-strength steel alloy with subsequent application of an anti-corrosion coating. It can appear white or silver, or yellow or black. At the same time, the difference between the color modifications of the surface in terms of resistance to rust is insignificant. The head of such a screw is often made in the shape of a countersunk cone with a flat base.
They can be supplemented with notches for better retention in the material. On the outside of the base there is a recess in the shape of a star or a cross for inserting a screwdriver bit or screwdriver. The threaded part is made asymmetrical, and is also equipped with special protruding segments along its entire length.
This allows you to strengthen the adhesion of the dowel to the mass of material when screwing. Along with the increased step frequency, this makes it possible to use the fastener both in standard concrete and in modified concrete with reduced density, and for better fixation of the material of the object being fastened.
Fastening a wooden block to a dowel in concrete Source ytimg.com
Note! Initially, the dowel is intended for fastening various objects to concrete. However, the specifics of the device make it possible to use it also for any type of brick. This is due to the peculiarity of the threaded part, in particular, the unevenness of its distribution.
Engine for a concrete mixer: power and operating mode
Gravity-type concrete mixers are usually equipped with an asynchronous electric motor with a squirrel-cage rotor, which provides the necessary torque. Many criteria depend on the type of transmission.
On a note! In a concrete mixer with a volume of 130 liters, you cannot prepare 130 liters of solution at a time: the maximum amount is 100 liters. This is explained by the fact that the filling of the tank with solution should not exceed 85%.
In a belt driven concrete mixer, starting the engine is simplified due to the slipping of the belts. For a concrete mixer equipped with a toothed belt drive, the starting process is much more complicated. The most difficult start-up is typical for geared concrete mixers.
An asynchronous electric motor is most often installed on electric concrete mixers.
When choosing engine power, these features must be taken into account. For mechanisms with a belt drive and a volume of up to 100 liters, a 500 W motor is suitable. Concrete mixers with a capacity of up to 150 liters are equipped with a 700 W motor. Larger devices must be equipped with an electric motor with a power of 1000 watts or more.
The power supply also plays a big role in choosing a concrete mixer. Devices that are connected to a three-phase network can withstand overloads much better and are characterized by excellent starting torque. Therefore, almost all concrete mixers with a volume of over 250 liters are equipped with a three-phase motor.
Motor power is an important, but not the main condition for the successful operation of the tool. For example, if an electric concrete mixer is equipped with a non-original engine or is made by hand, then you need to pay attention to its operating mode.
Most concrete mixers with a capacity of over 250 liters are equipped with a three-phase motor.
The main part of the engines is designed for long-term operation (S1). At the same time, such a load is unacceptable for a concrete mixer operating in “ragged” mode. You should pay attention to a product that can withstand multiple starts (S4). Devices of this type are specially designed for repeated, but not prolonged starts with phases: operation - cooling.
Method of performing vibroslating at home
To make a vibrating screed for laying concrete yourself, you need to acquire the necessary parts.
To fasten spare parts together, you should use a welding machine or other available options for creating fasteners.
Welding machine components
Handles can be easily made from pieces of reinforcement or small diameter pipes. The build process looks like this:
- Two corners are connected to a channel of the required size (it will act as a frame).
- The handles of the device need to be attached to the channel. Their length should be sufficient for comfortable work.
- The engine is also mounted on a channel, usually in the middle.
It would be nice to use aluminum to create the frame; it is not subject to corrosion and is lightweight. Creating a vibrating screed for laying concrete is not an easy task, but it is quite within the capabilities of the average person.
Making a unit for treating concrete surfaces is not that difficult. Using a store-bought device will definitely be more pleasant, but a homemade version, if executed correctly, can easily cope with the tasks assigned to it.
The power of the selected motor must be sufficient to create high frequency oscillations. To get an even and compacted coating, you need to move the lath slowly, pay attention to problem areas on the concrete surface, and periodically clean the working frame from material that will stick to it.
Connection diagrams for concrete mixer motors: recommendations
After the unit has been selected, questions arise about how to use the concrete mixer, how to connect it correctly, taking into account the number of drives. In this case, you must first understand the electrical circuit of the engine. Most concrete mixers are equipped with two types of motors - single-phase or three-phase. Of course, their connection diagrams differ from each other. Moreover, they also have different connection options, taking into account local conditions and the requirements for a particular engine.
The connection of a single-phase concrete mixer motor is special in the sense that it has only one working winding, which is laid in the stator in a certain order. After applying voltage to this winding, nothing will happen - the engine will make a “mooing” sound, heat up, but will not rotate. This is due to the fact that the motor requires an initial moment of inertia. Thus, if you give the engine rotor a good push, it will begin to rotate and gradually gain the required speed.
On a note! Before connecting a 4-wire motor, you need to understand the motor windings. There are two windings, which means there must be 4 ends. In addition, the electrical circuit of the concrete mixer assumes the presence of a capacitor of a specific capacity. It is needed so that the angle between the phases that are connected to the working and starting windings is different - preferably 90 degrees.
It is quite problematic to carry out such an algorithm of actions every time, especially if the engine has a drive mechanism. In addition, it is not always possible to give it the necessary inertia. Therefore, it is worth considering a connection diagram for a single-phase motor with a small starting winding. When voltage is applied to it, the motor begins to spin. After it has reached rated speed, the winding must be turned off.
Connection diagram for the electric motor of the “Brigadier” concrete mixer.
Terms of use
The most important component of knowing what a concrete dowel is is how to use it in a specific application. For this there are the following series of rules:
- The nagel is distinguished by its versatility. With its help, you can mount products from various materials - wood, plastic, metal, glass, stone.
- For optimal and quick installation, before screwing in, it is necessary to drill a mounting hole slightly smaller in diameter than the threaded part of the hardware.
- If the wall is made of a material with a lower density than standard concrete, then excessive force should not be used when tightening.
- Before starting fastening work, the surface must be well cleaned and leveled.
- The screw must be screwed in strictly according to technology and taking into account the permissible load and rotation speed. Otherwise, its rod may burst and the hole may become loose. As a result, there will be no fastening as such.
- When working with a concrete surface, you must use safety glasses, as the material is very brittle and can break off into small pieces and get into your eyes.
Spare parts for concrete mixers: categories and features of choice
Spare parts for concrete mixers are parts of the mechanism that play the role of consumable elements in it, which wear out during use of the tool and require frequent replacement. The main spare parts are ripple belts for a concrete mixer with a drive, as well as drive gears and start buttons for the device.
During operation, parts such as drive gears, cast iron gears, V-shaped, toothed and ridge belts wear out much faster. The listed parts must be kept in stock so that work does not stop at the most inopportune moment. The motor and gearbox for the concrete mixer deserve special attention. Gears, as well as the upper and lower supports of the equipment, called flanges, fail a little less often, but must be replaced.
Typically, the manufacturer provides a one-month warranty on spare parts for concrete mixers from the date of purchase, provided that the rules for their installation and operation are followed. It should be noted that electrical connectors are not included in the list of spare parts for concrete mixers.
The most popular spare parts are ribbed belts, drive gears and start buttons.
Leading manufacturers of concrete drills
The domestic market for construction tools offers concrete crowns from domestic manufacturers and foreign companies. Among the most popular are products from companies such as:
- Keos Co ltd and Messer Cutting Systems (South Korea);
- "Hagwert" and "Bosch" (Germany);
- "Distar" (Ukraine);
- "Praktika" , "Enkor" , "Zubr" and "Trio Diamond" (Russia).
The popularity of concrete crowns from the above listed brands is confirmed by the reviews of real users left on the Internet. Here are some of them.
Review of the Keos DC068.70 diamond concrete bit:
More details on Otzovik: https://otzovik.com/review_2818582.html
Review of Hagwert concrete crowns:
More details on Otzovik: https://otzovik.com/review_5557970.html
Review of the “Praktika” diamond bit for concrete:
More details on Otzovik: https://otzovik.com/review_2779584.html
Review of the Anchor brand crown:
More details on Otzovik: https://otzovik.com/review_4614464.html
Review of the Zubr brand concrete crown:
More details on Otzovik: https://otzovik.com/review_6797992.html
How to properly repair a concrete mixer with your own hands
Despite the degree of quality of the product, sooner or later a question arises regarding the repair of a concrete mixer. In this case, the breakdown may have different prerequisites and nature due to the fact that significant loads are placed on this mechanism. The main reasons for the failure of a concrete mixer are its improper operation and storage.
To repair a concrete mixer with your own hands, you need to have minimal knowledge about this type of equipment and an understanding of its structure. If in doubt, it is better to turn to professionals. When you have confidence in your own abilities, you can start working by first preparing the necessary tools.
The list of devices includes:
- three-jaw puller;
- bearing puller;
- vice;
- hammer;
- pliers;
- chisel;
- screwdrivers;
- a set of keys.
Then you need to understand the reason for the breakdown of the concrete mixer. There may be several of them:
- loading the device beyond the norm;
- The drum is not cleaned on time;
- the rules and conditions for storing the instrument are not observed.
On a note! You can avoid or delay concrete mixer repairs by following certain requirements. To do this, you must always clean the bowl and mechanism after work, observe the proportions of concrete for the concrete mixer and not overload the device with an excessive amount of solution, and also store the tool in proper conditions.
Repairing a concrete mixer is not a difficult task; you can do it yourself.
Replacing consumables such as belts, drive gears and start buttons are the most common types of DIY concrete mixer repairs. Bearings and gears are replaced much less frequently, since their service life is much longer.
Why make balusters yourself
Homemade balusters can come in a variety of shapes
Of course, you can purchase ready-made balusters, but this does not suit everyone:
- Products offered on the construction market may not be suitable in design and may not fit into the style of the staircase, interior or facade.
- Finished balusters may not fit the dimensions of the fence or staircase.
- I want the staircase to be original, exclusive and not like others.
- The price for making to order will most likely be high, or the deadlines for its implementation may also not be satisfactory.
- Making something with your own hands for your home is always a pleasure.
How to properly mix concrete in a concrete mixer
There are various ways to prepare the solution in a concrete mixer. They depend on the design of the device and the principle of operation.
In gravitational machines, the process of combining all components of the mixture is carried out by turning the container with the solution from top to bottom or along the axis. Mixing occurs under the influence of gravity. A similar result can be obtained even if a manual concrete mixer is used. However, large volumes of mortar cannot be achieved in this way, so this option is recommended exclusively for private construction.
The forced-mechanical method is similar to the gravitational method: it also allows you to achieve a high degree of homogeneity of the solution. The mixing mechanism includes a horizontal or inclined type tub into which the mixer is immersed. Such a container can rotate on its own without a mixer; instead, mixing is carried out by the blades that are located inside the tub.
Methods for preparing a solution in a concrete mixer depend on the design and operating principle of the device.
The forced vibration method assumes the presence of a stationary container. For mixing, a mixer is used, which produces compression waves, which contributes to effective mixing and compaction of the mixture. It should be noted that this method is energy-intensive, since preparing 20 liters of solution will require a vibration drive with a power of 1.3 kW.
The combined gravitational-mechanical method is a combination of all of the above methods. Knowing how to properly load a concrete mixer, you can make this tool yourself.
Using the smoother
This is a special tool that is used to finally level the concrete surface.
When pouring the concrete base, the initial smoothing of the mixture is carried out as a rule, guided by the installed beacons. This tool evenly distributes the mixture over the concrete surface, leveling slopes, filling holes and clearing off formed bumps.
But even high-quality laying of concrete leads to the formation of unevenness in it, after 1-2 hours. This phenomenon is associated with the release of “concrete milk” from the solution, so you need to do a finer smoothing, removing excess water. At this stage, the master works with a smoother, which performs the following functions:
- Eliminates excess moisture;
- Removes minor irregularities;
- Compacts the concrete mixture.
How to make a concrete mixer with your own hands: brief manufacturing instructions
Considering how much a concrete mixer costs, many consider it advisable to make the tool themselves. To do this, it is enough to purchase the necessary materials and acquire certain skills. Homemade concrete mixers have different designs depending on the operating principles listed above. They are manual, vibrating, and also containing an electric drive.
You can make a simple manual concrete mixer with your own hands. The drawings are available on the Internet. The manufacturing process consists of the following stages:
Homemade concrete mixers can have very different designs.
- Take an old brew or can, first checking the container for integrity.
- Insert a piece of pipe into the handle of the can and secure it to the tank with a rope or rubber band.
- Weld the vessel to the axle. If an aluminum container is used, then handles made of metal strips approximately 1 cm thick are attached to it using screws.
- A hole in the shape of the letter “U” is cut in the frame for the purpose of laying the axes and attaching the bearings.
On a note! A vertical manual concrete mixer prepares the mixture much faster, but a horizontal loading device produces a better quality solution.
If the can is supposed to be positioned horizontally, then a hatch must be made on the side for loading, and the container must be secured to an axis. You can use steel pipes for support. This design rotates slowly, so the period of mixing the solution can take approximately 20 minutes. At the same time, the productivity of such a concrete mixer is several times higher than that of a machine whose operating principle is based on the “scoop” method. An electric motor with a power of 2.5 kW can be connected to this design, taking into account that the tank volume is 50 liters.
Varieties
Pins for fastening to concrete differ in the following number of characteristics:
- Material.
As a rule, hardware is made of hard-to-deform carbon steel. However, there are also less durable specimens made of brass and stainless steel.
- Coverage.
When using galvanization, the screw has a white or silver tint and can be installed both inside and outside. Zinc also gives a yellow color, but due to its rust resistance, such hardware can only be installed indoors. The black color is the result of oxidation or fluoridation. The screw can be used in a home with normal humidity.
- Head shape.
They can be equipped with either a countersunk head or a protruding head. In addition, they differ in the type of tool used - for a bit, a Phillips screwdriver, a wrench. They can also be made in the form of a classic pin and hook anchor.
L-shaped hook screw for concrete Source vsecuplu.ru
See also: Catalog of companies that specialize in finishing materials and related work
- Thread type.
The dowel is equipped with several types of threaded parts - universal, herringbone and with a variable pitch.
Important! If the dowel does not have a dowel structure, this does not mean that in order to screw it in, you do not need to first make a mounting hole. To simplify the installation procedure in dense concrete, it is better to drill a slightly smaller diameter than the threaded part of the screw. Since absolute self-tapping screws for concrete without drilling do not exist, an installation channel for the highest density material must always be made.
How to make a concrete mixer from a 200 liter barrel with your own hands
You can also make a concrete mixer with your own hands from a 200-liter barrel, either manually or electrically. If we are talking about a manual device, then the container is simply placed on a shaft that rotates by means of handles attached to the ends. For greater mixing efficiency, it is necessary to weld partitions with a height of 10 to 15 cm in the middle of the barrel along and across.
For mobility, concrete mixers made from a 200-liter barrel are mounted on a frame with wheels.
The mobility of the device allows you to install the stands on a wheelbarrow or frame with wheels. The barrel must close tightly, since it is supposed to be horizontal. Flanges with bearings are attached to both sides, to which the shaft is welded.
To make it convenient to load the components and pour out the solution, in the process of making a concrete mixer with your own hands, you need to make a hole from a barrel where the hinges are welded and a manhole cover with an airtight layer is put on. To ensure the static nature of the product, the shaft is secured with racks. To avoid distortions, the supports are buried in the ground, and handles are attached to the container.
You can make a do-it-yourself concrete mixer from a 200-liter barrel using a different method, but the same drawing. The main differences between the two options are the use of a motor, which is fixed through a pulley on one side of the barrel, as well as the vertical position of the device. A homemade vertical concrete mixer is mounted on a rotating frame with an installed motor, and rollers are attached to the barrel to spin it on the shaft. To facilitate rotation, handles or a steering wheel are attached to the container.
What is it and where is it used
It is a regular self-tapping screw with a reinforced shaft and a hex head that can be screwed into concrete.
In addition to small items, you can use them to strengthen:
- door frames;
- frames;
- fencing;
- pipelines;
- heating radiators.
Below we will look in more detail at the types of such fasteners, as well as how to use concrete dowels correctly.
Hardware for concrete
Kinds
Hardware products used for installation in concrete surfaces are usually classified according to the following criteria:
| Head shape |
|
| Type of protective coating |
|
| The shape and pitch of the thread on the rod |
|
Types of dowel heads
The shape of the head directly affects the installation of the self-tapping screw. For example, screws in the form of hooks and studs are allowed to be installed only in a hole that has been pre-drilled and with a dowel. Other self-tapping screws for concrete are screwed in without drilling or with it.
Copper-plated screws for interior work
For example, screws with a hexagonal or countersunk head are screwed in without drilling a mounting hole. However, not every concrete is suitable for such installation.
Screw with variable thread and serrations along the entire length of the rod
Advice: cellular concrete is the best, but reinforced concrete is not suitable for this installation method.
The price of self-tapping screws depends on the scope of their application, the shape and pitch of the thread, and the length of the hardware also affects it. With a herringbone pattern, products will cost less than dowels and universal ones, and a screw 12 mm long will cost less than 200 mm, since less material and working time will be spent on it
Selecting and installing a self-tapping screw
Typically, concrete screws are selected based on the amount of load they will have to withstand due to the weight of the interior part. For example, to support 100 kg you will need a self-tapping screw with a length of 160 mm and Ø10 mm, but a shelf weighing 5 kg will be supported by a self-tapping screw with a length of up to 25 mm and Ø3 mm.
Screwing the dowel into the concrete base with a wrench
After determining the type and size of the product, you can begin the installation procedure. In this case, dowels and universal screws can be screwed into the wall (floor or ceiling) immediately, without pre-drilling the base; at the same time, you will have to tinker with a self-tapping screw with a herringbone thread.
Tip: a screw with a herringbone should be installed in a mounting hole, the diameter and length of which should exceed its dimensions by 5 mm.
This is due to the fact that after drilling, it is necessary to install a dowel into it (preferably under tension). It can be made of polymer materials or wood; its main duty is to accept and hold fasteners. You can screw the self-tapping screw into the dowel yourself using a regular screwdriver.
Tip: After drilling a hole, remove any dust from it.
How to screw a self-tapping screw without a dowel into a concrete wall
It is important to use the self-tapping screw correctly, otherwise it can simply break off. It is necessary to tighten a screw with a non-countersunk head with a certain force, making sure that it is not broken during the process by simply over-tightening. It is also possible to break off the head due to the high heating temperature of the screw body when screwing into concrete.
Electric concrete mixer: prices and popular models
When it comes to value for money, you should trust trusted manufacturers. In this list, Lebedyan concrete mixers occupy a special position, differing from competitors in a number of characteristics that satisfy user requirements. The Lebedinsky plant specializes in the production of SBR concrete mixers and similar machines, which makes it possible to obtain more reliable and high-quality products.
For large volumes of work, it is better to purchase concrete mixers from trusted manufacturers.
The product line includes both manual equipment and electric concrete mixers, which are characterized by a long service life. A special category consists of professional machines with large capacities.
On a note! If we are talking about private housing construction or low-rise construction, then you can choose Profmash concrete mixers. This company specializes in the production of small devices.
A concrete mixer is a convenient piece of equipment that is used to prepare various types of solutions, from tile adhesive to concrete for garden paths. The modern market offers a wide range of these mechanisms, which are characterized by durability and ease of operation. You can also make a concrete mixer yourself. To do this, you need to study the structure of the device, purchase the necessary materials and tools.
