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Building Materials

August 12, 2017 18:08

Proper Maintenance of concrete - the key to its durability

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Why needs curing?

Despite the fact that the concrete walls and floors look monolithic, in fact, just as it seems.Let us remember that part of the concrete solution.First of all, there is not even the cement and sand, of which there should be about 8 parts, then gravel - even 10-11 parts, and cements - Part 3.Of course, the compositions can vary depending upon the grain of sand and gravel fractions quantities, proportions may be 3: 2: 1 (gravel / sand / cement) or 4: 2: 1, is not the point.

obvious thing - concrete or artificial stone, consists of particles of sand and gravel, cement interconnected .And, therefore, about any monolithic and can be no question, it holds moisture permeability, and freezing to a certain depth (depends on the brand of cement).And where does the curing, you ask.And what is meant by it?No, of course, there is no need to wipe the concrete surface with a cloth every month or, God forbid, it namyvat cleaners.

Care carried out a lump sum at the time of the preparation of mortar and immediately after the pour.For example, to your future monolith was not afraid of the water in the solution should be to mix the water-repellent additive in addition to the components listed above.Otherwise, the structure of the concrete cracks, which sooner or later will lead to the destruction of the slab.

After hardening of the concrete is covered with a hydrophobic compound, by conventional application by hand if the surface is completely dry, or under pressure, if your suspicion, moisture will penetrate the upper layers of the plate.

Why crack the concrete and how to fight it?

reasons why cracked concrete, reinforced even more than enough.For example, the moisture which has the property to penetrate the smallest pores, and during the frost to expand, increasing the void, then during warming water melted and reduced in volume, and the vacated space will take a certain amount of moisture.And so long as the voids between the cracks do not develop, due to which the stove eventually begins to break down.

This is especially noticeable in the case of hinged balconies, the edges of which after 10 years of operation, the house is a pretty sad sight - no angles as such, sticking valves.Intensive evaporation of moisture from the plate thickness can also lead to its cracking, for example during rain at a sufficiently low temperature, moisture can penetrate into the pores, and then starts the sun shine, concrete is heated and water vapor from literally breaks its way outwards.To combat the devastating impact of moisture can be by processing concrete hydrophobic compounds, as mentioned above.

However, even in the absence of moisture in the structure, cracks may occur due to the expansion of the concrete at the time of raising the temperature and contraction of it in cold weather.Of course, cracking will occur only with a sharp temperature drop, when, during a frost outer layers are narrowed, and in the depths the temperature drops slowly and appears in the structure of the voltage difference.Alas, with the temperature changes can not be struggle, the only way to protect the concrete walls and floors - use a mixture of hardy and do not forget to use a variety of insulation.

Concrete Processing - any substance used

not think that it's so simple - choose the desired hydrophobic plasticizing liquid for improving the water-repellent properties of the concrete.First you need to decide for yourself, how high should be the level of moisture resistance to the floor slab or wall, and then use one or the other component.It should be borne in mind that some substances used is in the form of additives and other only as impregnation, i.e., treatment of the concrete takes the form of external application.By the way, the waterproofing can be provided, and exterior trim.

most frequently used repellent organosilicon liquid or briefly - NGL belonging to the second group and the third action on the effect of additives that reduce permeability in 2-4,9 times and 1.4-1.9 times, respectively.These fluids are etilgidrosiloksanovaya liquid (NGL-94, the second group), sodium etilsilikonat (NGL-10, the third group) and sodium methylsiliconate (NGL-11, the third group).

But the most effective is the additive sodium alyumometilsilikonat AMSR-3, which is a result of the reaction of aluminum metal with sodium methylsiliconate, and increasing moisture repellent properties of concrete 5 times.There are other similar substances belonging to the same group.The concrete process, should be resolved on the situation, with an eye on the terrain and climatic factors brand of concrete, as well as the fact of it being built design for what purpose.

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