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Concrete is one of the most important materials in building and strengthening. Concrete is produced from a combination of water, cement, sand, which is mixed together in calculated proportions. All sorts of errors in the production of concrete lead to deterioration of the concrete. This very effective material is used in most of the buildings And in combination with rebar, it becomes a very strong and rigid structurev Which is resistant to various conditions. But sometimes things happen that cause the concrete to break down and need to be repaired, repaired or completely removed. In these cases, and according to the general principles of concrete repair, by performing a series of evaluations, they repair the concrete.
Usually, after examining the concrete surface in person, specialists can understand the problem of concrete and choose the best way to repair it. concrete whose surface has very large pores , Or if it is scaly, it will need to be repaired, which is also called chrome concrete. Cream concrete sometimes cracks, which is again assessed and repaired according to the amount of cracks and corrosion. Concretes that have shrunk, broken, corroded rebar should also be repaired according to the general principles of concrete repair .
According to the general principles of concrete repair, the repair of this rigid material is divided into two categories : structural and non-structural. In the repair of structures, the concrete of the whole structure and its load-bearing capacity or a part of it is changed, which must be done by specialized engineers. In non-structural repair, parts of the concrete of a building are repaired locally and the load-bearing capacity of the structure remains intact .
Concrete can deteriorate under a number of factors, including :
1.Sudden drying that causes the concrete to shrink and crack
2.Severe blows to concrete
3.Changing the seasons and the heat and the heat
4.The effect of water on the concrete surface
5.Remove the protective covers of concrete
6.Natural phenomena such as flooding and earthquakes
7.Excessive traffic or excessive car traffic
8.Improper processing
Repair concrete or repair mortar is available in three different types depending on the cause and severity of failure. These categories are based on the general principles of concrete repair .
1.Epoxy or polymer mortar or concrete
2.Cement-based mortar or concrete
3.Cement-based mortar or concrete modified with polymer
Pouring repair concrete is done in one of the following ways :
1.There are two types of dough and hard
2.Use for low levels and thickness
3.Expanders, resins or latex or microsilica fibers are used as required
4.Its dough type, Trowling, which is very doughy, is used for low surfaces that do not have rebar
5.The hard type is Dry Packing, which is stiff and is used for greater thickness, for example in holes, seams, etc
6.Manual mode does not require a format , suitable for vertical planes or ceilings
1.It has to be done quickly because the high speed will increase its intensity
2.No need for formatting
3.Implemented by air pressure and has two types, dry and wet
4.Used for thicknesses less than one and a half centimeters and has a wasted material
5.It needs high skill and is used for large surfaces
1.It is better to use self-compacting concrete in this method
2.There is a need for a format
3.Can be used for different surfaces such as walls, columns, ceilings, etc
1.Fluid and self-compacting concrete is poured on the floor
2.Concreting is done through holes
3.Requires special formatting
1.It is used to fill in holes , cracks , and defects
2.Mortar can be one of the three types mentioned above
3.To control the quality of execution, correction is performed
4.A variety of injection needles are used with pressure
5.A hole is made to insert the needle into the concrete, which must be punctured with mastic to prevent the material from coming out, but air must be allowed out
6.The distance between the needles and the pressure depends on the type of repair
7.Prior to injection, the injection site is cleaned and evaluated using water
8.Sometimes special chemicals are used to fill the joints and inject
1.Used for repairing concrete in underwater structures
2.Waterproof mortar and concrete are used to repair such structures
Ahan Pouya with more than a decade of best-selling experience, adheres to professional and ethical principles in the field of selling and buying at inside and outside the borders of Iran, helping you in the steel industry.
