As the winter to warm the concrete during construction ?

How is the building in the winter?

winter period of low temperatures, as the construction is going on complexes of concrete structures at this time?It is known that the concrete - a mixture of gravel, sand, cement and water in certain proportions.A time during which the solution is gaining strength settlement is 28 days.Also we know that the water freezing, has a greater volume and is able to break the monolithic structure.

There are several ways to circumvent the limit on the temperature, but they all boil down to one, maintaining the solution temperature above zero.If you do not comply with this norm, erected structure will be strong enough and quickly destroyed.Below we give a few popular methods of heating concrete at a construction site in winter.

Shelter and heat gun

technology is quite simple - at the desired site construction tent and a heat gun blown heat.Quite common method grandfather warm basement hot air.Used in small areas of construction, labor-intensive process associated with the construction of heat-retaining dome.

If you want to warm up the concrete heat gun, keep in mind that it will be quite a costly option.The only advantage of this method - the possibility of heating the concrete screed without electricity.There is stand-alone thermal guns, mostly diesel.If access to a network of 220 volts is not present, this option will be most advantageous warming.

clearly see this way of heating you can on video:

Termomaty

Special electric heaters in the form of mats draped filled with a solution prepared site.The substance solution is added to accelerate the curing process and prevent crystallization water.This method is good for heating large flat horizontal surface in winter.

Complex structures, columns are not you heat.To learn more about how to warm up the concrete structure mat, you can in the video below:

Formwork with heater and electrodes

to warm the walls and poured concrete columns timbering company's developers use with underfloor heating.Teploizolirovanny and formwork from the concrete heaters installed solution.The design of a heater does not require any sophisticated equipment, are easily replaceable.

electrode formwork consists of rods or metal bars attached to the formwork at regular intervals.The electrodes are connected to a special transformer, and due to the water in the cement solution is its heating.How would the lack of warming formwork - are standard sizes, and if the customer's custom design, use other ways to warm concrete during winter.

electrodes

most commonly used to heat the columns and walls of concrete.After filling the frame elements in the formwork, reinforcement is inserted into the solution, placing and distributing them in groups by connecting to a transformer or svarochniku, as shown in the diagram below:

possible and pre-positioning of the electrodes along the string frame.The photo clearly shows the installation of the electrodes in the concrete principle:

Water plays a role in the solution explorer and gradually hardened as the current through the electrodes falls.Rolled after hardening mixture is part of the design.The disadvantages of this method include warming enormous energy consumption and additional costs for the material of the electrodes.

Wire PNSV

Versatile and affordable way to concrete warm in winter with the help of a high step-down transformer and cable.During linking frame of the valve fits the heating cable, the size and shape of the design is not important.

This method of heating is applicable to both on-site as well as for home builders masters.Tell us a little more about how to warm up the concrete mix wire PNSV at home.

After reinforcement frame structure or stacking beacons for self-leveling floor, fit Wire snake no closer than 20 centimeters from each other (optimum stacking step).The length of a loop is between 28-36 meters.The welder may be used as a voltage source.Connection diagram in this case would look like this:

Nuance warm, PNSV not connect neukryty solution, becausewithout absorption of heat from the high temperature in the open air, it burns.To avoid burnout make the transition to the aluminum cable leaving the outlet ends of the heating wire PNSV 10 cm from the solution.The manufacturer recommends that the current in the cable is 11-17 amps, which can control the current clamp.To learn how to use the clamp meter, we reported in a separate article.

For home building enough PNSV diameter 1.2 mm.Its characteristics:

• resistance of 0.15 ohm / m;
• operating current immersed in a solution of 14-16 amperes;
• laying temperature of -25 to 50 ° C.

consumption wires on concrete cube of 60 linear meters. temperature to which the heated concrete - 80 ° C, its control is exercised by any thermometer.Speed ​​dialing solution temperature should not exceed 10 degrees per hour.To avoid needless spending on electricity bills, the heated portion of harboring any material prevents the warming of the atmosphere, for example, is filled with sawdust.For best results before pouring the concrete mixture is also heated, temperature of the mixture should not be below +5 ° C.It is for such instructions to warm concrete during winter time with their hands.Technology is time-consuming, but the power of even inexperienced person.To learn how to lay the heating cable in the foundation, says the video tutorial:

way, instead of the wire can also be used PNSV BET cable for heating concrete.In the video below briefly considered installation instructions of the heating conductor:

The article does not include all the concrete ways of heating in the winter.There induction, infrared method, and others, but they were not considered due to their low prevalence and complexity.We gave an overview of the technology of construction of concrete structures, and the possibility of using DIY methods of heating screeds and walls.Incidentally, the use of wires PNSV possible not only during the heating structure being built, but already after.It can be used as a ready-floor heating and anti-ice on the stairs or sidewalks.Short sections are connected via a step-down transformer from 400 to 1500 watts.To connect directly to the network 220 cable length is more than 120 meters.

That's all that I wanted to tell you why you need a concrete warm in the winter and how to implement it using heat guns, electrodes or wires PNSV.We hope that our instructions are clear for you.More information you can get by viewing the video tutorial in the article.

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