Repair work quite often involves the need not only to lay concrete, but also to destroy it. Today, different methods are used for this. They are usually relevant when the destruction of the material must be carried out in large volumes, while achieving high efficiency.
Use of hydrocline
The technology is based on the action of a stretching mechanism. The hydraulic wedge used makes it possible to generate a force equal to several hundred tons. Monolithic concrete begins to collapse under the influence, because it has a rather low tensile strength.
Concrete dismantling with hydraulic wedges involves drilling holes with a diamond drill. A hydrowedge is inserted into the holes obtained, the diameter of which ranges from 160 to 180 mm. The pumping mechanism is then activated. Concrete begins to experience overload and stress, which contributes to its destruction.
Using the breaker
Bother technologies can be used in the destruction of concrete. This should include a hydraulic hammer, which is a removable attachment mounted on an excavator instead of a bucket.
This device is connected to the hydraulic system, installation does not take much time.
Concrete dismantling with a hydraulic hammer allows you to destroy structures in a short time, including:
- bridge supports;
- concrete foundation;
- asph alt;
- reinforced concrete structures;
- monolith.
If it is necessary to open underground utilities, this technique is indispensable.
Using a jackhammer
Due to the fact that the destruction of concrete today is one of the most sought-after tasks in the repair and construction industry, specialists use different technologies, among them a jackhammer. Only professionals can do this approach, because physical strength and training will be required.
If the coating depth is more than 15 cm, then special equipment will be needed. Dismantling of concrete with jackhammers allows you to destroy concrete and brick structures. The power of the tool used is 25 J or more.
The disadvantage of the method is the formation of a large amount of dust and debris. It is better to use technology if the room is not residential, otherwise the dust will cause discomfort. A jackhammer is indispensable for creating openings, grooves,holes and niches. The tool can handle material of any thickness.
Concrete dismantling by different methods
The dismantling of concrete can be carried out according to a certain technology, which is determined by the purpose of the object. Taking into account some features, the following types of work can be carried out:
- mechanical;
- electro-hydraulic;
- semi-mechanical;
- explosive.
You can also classify work according to a simplified scheme, it can be unstressed or shock. The dismantling of concrete can be carried out quite effectively by combining several methods. The structure can be partially reconstructed.
But in the case of the dismantling of walls and partitions, manual equipment is usually used, such as hydraulic jackhammers. This method is quite common for the reason that it is inexpensive and convenient. The dismantling of concrete can be carried out with jackhammers with different characteristics. It all depends on the size of the area. The power of devices can vary from 500 to 3360 W.
In those places where it is not possible to achieve the desired result with a hydraulic hammer, sawing is used. The technology involves the use of a grinder with diamond discs. The working parts in the process are periodically cooled by air or water. This method is applicable when dismantling reinforced concrete structures or exposed parts of the foundation that have reinforced parts.
The impact method is also relevant for those objects that are connected toother buildings, because the grinder does not create vibrational vibrations. The only downside is the loud noise. The dismantling of concrete from the walls is carried out in this way. It allows you to ensure an even cut on the marked areas. Guides are installed for the diamond blade in the next step. Sometimes you need to make a deep cut or several. In this case, the cutting lines can be parallel to each other. Then such sections are combined into one recess.
Alternative solutions
The dismantling of concrete can be carried out using expansion mixes that are poured into cracks and holes. These substances crush concrete without mechanical action. After a day or two, the material simply crumbles, it will only be necessary to clear the area.
For primary or accurate destruction, you can use hydraulic shears, which look like attachments for special equipment.
Conclusion
If you do not plan to carry out the work yourself, then you can use qualified help. Diamond cutting, for example, will cost 5390 rubles. for m3. The maximum price level is kept within 9000 rubles. per cubic meter. If concrete needs to be broken in the area of floors or ceilings, a wire rope machine is usually used. For a cubic meter of destroyed material, you will have to pay 7,000 rubles. minimum. If specialists use hydraulic hammers, then the maximum cost of such work will be 7,000 rubles. per cubic meter. Priceusually determined depending on the conditions and complexity. The final price is affected by the thickness of floors and walls, if specialists have to work with them.
