Overview and views, as well as properties for quick setting - Step by step + Video

Overview and views, as well as properties for quick setting - Step by step + Video Natural hardening of concrete is a rather long and responsible process.

The quality of the product depends on how it flows. But if, for some reason, it is not possible to wait for several days, in this case the builders use accelerators.

Accelerators accelerate chemical processes without compromising the quality of the casting. The hardening of the solution will not do without water.

In this article we will talk about concrete hardening accelerators.

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Conditions for using concrete hardening accelerators

Overview and views, as well as properties for quick setting - Step by step + Video A favorable temperature for hydration is plus twenty degrees and a humidity of ninety percent. Humidity must be constantly maintained, this is necessary so that the solidification process does not stop.

If there is not enough water during the hardening process, then the structure will be fragile and lose its solidity.

Concrete does not harden at zero temperature.

At very low temperatures, water becomes ice. To ensure the concrete hardens, it is heated and, thanks to the hardening accelerators, the heating times are significantly reduced.

In what cases are concrete hardening accelerators used?

  • When construction work is carried out in the cold season, that is, in winter.
  • If there is a need to remove the formwork earlier.
  • For construction work to resume before the concrete has cured.

  • In the production of large-scale precast concrete products.

If you use concrete hardening accelerators, you can use fewer forms in the manufacture of reinforced concrete products, while the quality of the products will remain unchanged.

Overview and views, as well as properties for quick setting - Step by step + Video

To optimize the strength properties of concrete and the plastic properties of the mortar that has undergone hardening, in construction, mixtures based on chlorides are used.

Such mixtures have high efficiency and low cost. But there is only one drawback - the finished product cannot be autoclaved.

Additives accelerating concrete hardening are plasticizers and are added when mixing concrete along with all the ingredients. Additive for quick hardening of concrete, it is necessary to add dosed.

Many additives cannot be used for mortars made of alumina cement, and it is also unacceptable to use reinforcement made of heat-hardened steel in concrete products. These restrictions do not apply to sodium sulfate.

Overview of additives

Additives that are popular, as well as their brief characteristics are listed below.

Universal P-2

Overview and views, as well as properties for quick setting - Step by step + Video This additive allows you to abandon the steaming of reinforced concrete products, concrete also gains its strength faster. Such a hardening accelerator contains anti-corrosion additives that contribute to the preservation of the reinforcement.

Fort UP-2

This additive is complex.It is prepared on the basis of sodium salts, which increase hardening by about thirty percent.

This additive increases the mobility of the concrete mixture up to class P5 and it does not depend on the ratio of water and cement.

This quality of Fort UP-2 allows increasing the structural strength up to one hundred and fifty percent by reducing the amount of water.

This additive is used for the manufacture of products of high density and with improved surfaces.


Produced in liquid form, used in the production of foam blocks.

Asilin -12 is added to the concrete mixture when the air temperature is plus twenty-five degrees or does not reach plus ten degrees.

Calcium chloride

Accelerates the hardening and improves the wear resistance of concrete.

Calcium chloride draws water directly from the environment and holds it in the concrete.

The product is of high quality and ripens 2.5-3 times faster!


Anti-freeze plasticizer and hardening accelerator ...

Used at minus fifteen degrees.

When this plasticizer is added, concrete hardens within three days.

Accelerator Relamix

Overview and views, as well as properties for quick setting - Step by step + Video These are several types of plasticizing additives that reduce the rapid hardening of concrete.

Relamiks-M and Relamiks-M2 . These additives are needed in order to increase the rate of concrete hardening in order to work with it in an aggressive environment.

Relamix-Shotcrete , this plasticizer is necessary for the manufacture without alkaline solutions that are applied by machine.

Relamiks-PC , it does not contain chlorides in its composition, for this reason it is used as an additive for fast hardening of reinforced concrete products.

Relamiks-SL, it is based on potassium and sodium salts. It is most often used for aerated concrete and high strength structures.

Concrit -F

The accelerator provides strength in the first day, and hardening occurs 2-3 times faster.

The surface of a product or structure with the addition of this plasticizer is particularly resistant to wear.

Conkrit-F is added to concrete in the manufacture of paving slabs, fences and other and molding products.

Cementol Omega P

Overview and views, as well as properties for quick setting - Step by step + Video This plasticizer is produced in Slovenia, provides fast hardening and high water resistance.

Addiment BE

BE2 - made in Germany. Such a plasticizer is produced for solutions that must be applied by machine.

BE5 - antifreeze additive.

BE6 - such an additive is brought in ready-made form and added for the preparation of repair mortars, for quick setting.

There are many universal additives to accelerate the hardening of concrete, and they can also improve the quality of concrete.But if we compare less functional additives and these, then they will cost more and the most expensive component is the accelerator. We hope this article was informative for you.