Concrete work - it is something without which today can not do any construction.Experts identify several phases in operations of this kind, the first of which is designated as a preparatory.Some sources consider it an afterthought, but professionals believe that it is important, becauseIt includes conducting planning works, land management, as well as the production of formwork or forms (to perform the track, for example).
Concrete operation of the second kneading step is a concrete mixture, during which separately mixed sand and cement, and gravel mixed separately correct size (if necessary).The mixture is poured layers - a layer of gravel, a layer of cement-sand mixture, then the layers are thoroughly mixed (Harz).Then the resulting mass is combined with water.If the work does not have a large scale, it is possible to add water from a watering can, also require large-scale mixers.Keep in mind that when wet concrete mass decreases in volume.For example, a cubic meter of dry mix can get about 0.6 cubic meters.meter of concrete.
if the concrete work is carried out on an individual basis, it is necessary to take into account that concrete can absorb additional moisture during rain or dry out in the sun, so the third stage - laying - should be carried out immediately after preparation.Concrete stacked layers is not more than 20 cm, each of which is leveled and compacted beetles.This is to prevent the formation of air voids.To wooden formwork does not absorb water, it is necessary to moisten somewhere three hours before stacking and board, of which it is made, shall be fitted tightly to each other in order to avoid leakage of the solution.The most recent layer of concrete is well aligned using the board level and for reconciliation.
Concrete work performed by a cast of weight (high level of mobility), is performed using a submersible vibrators that remove air bubbles from the concrete, preventing the formation of a cellular.
Note that with the laying of the last layer of the concrete work does not end there.Now it is necessary to solidify at a strictly defined temperature and humidity in order to give the necessary strength and durability.It is believed that if the mass does not give the correct form, then it will crack, eroding badly passing cycle of freezing and thawing.To save water in the solution using special film or sealants.You also need to monitor the temperature in the positive zone installation, becausecause frost damage to the concrete from freezing.
cost of concrete work depends on their size, one price will be prompted for the formation of the floor, the other - for the erection of walls, and the third - for the construction of staircases, etc.The value usually affects the area, which is the usual unit of measurement is square meters, as well as the complexity of the operations.Prices for concrete works are often set for each stage of the work - from dismantling any previous designs to protect the construction of the foundation or other structure from precipitation.
