Warming concrete wire PNSV scheme laying which will be described below, is used when working outdoors in the winter.Such manipulations necessary for the reason that when exposed to cold weather solution slowly begins to gain strength, it just begins to turn water into ice.Longer hardening of concrete is the reason that the work dragged on for weeks and months, in addition, there is a possibility that the design does not acquire adequate strength will crumble in use.
principle of operation wires
technology heating concrete wire PNSV is that before the start of the fill taken the necessary cable cross-section and stress is laid, and then filled.Then the cable included in the network.Do not be afraid that the quality of the concrete will change under the influence of high temperatures, blisters appear as a crack after curing, but the curing process will not be stopped by low temperatures, which will provide a solid and reliable design.
Technical features wires for concrete
Wire for heating con
Stacking can be performed at -25 to + 50 ° C.Before purchasing you need to determine how many wires will be used, so, for 1 m3 solution will need about 55 m.
Winter heating PNSV concrete wire is perfectly safe, since the production of the product receives a quality insulation to prevent fire.There is almost no risk that would be broken-lived, as it is strong enough.It should not be actuated until the wire until it is immersed in solution.Otherwise, the burnout due to the increased current.However, the conclusions are not afraid of such things, because they are composed of wire more impressive section, representing the so-called cold ends.They are made of AR-4, the maximum length is 1 m.
Methods of heating concrete wire PNSV involves the ability to use it not only in the domestic but also on an industrial scale.Sometimes the installation is done in
foundations and fences.
Conducting cable installation
Working with cable involves a critical manipulation.Before starting the installation process, the surface must be free of debris and foreign objects that applies to those elements that can damage the wire.In this it is important to ensure that the cable is not bent.It is recommended to carry out laying a semicircle, but should not be formed unfilled areas.The most simple method of laying the snake appears.
After switching on the need to proceed with caution.So, there should be changes in voltage, to achieve this goal is required to use a stabilizer, otherwise the wire just burn and remove it will not be possible.
Driving heating concrete wire PNSV there in the article.Once you implement it in practice, you can produce and fill connection, which involves summing up the cable to a power source.Recommended for use when connecting the transformer.As a rule, experts recommend the use of the station for heating brands SPB 40, SPB-80.
connection can be made on two electric circuits, the first of which is called a "star", while the second - a "triangle".In the latter case, the wires in the wire divided into three equal parts and wires, each mated in parallel.Educated sets necessary to connect a 3-node and connect to the terminals of the 3rd station.
Features of warm
Before You Start, you must know the time of heating concrete wire PNSV.
During the first period, the solution is warmed, and the temperature was not allowed to increase more than 10 0 C for two hours.The second period should not be accompanied by a rise in temperature over 80 0C.At the final stage cooling.At the same time, too, should not rush, and should not be a reduction of more than 5 0 C for one hour.
Warming concrete wire PNSV scheme laying described herein do not vary much with the technology of installation of "warm floor".In addition, the cable can be operated at such ends.However, the system would have to finish a little, erecting heater wires of the strands, while top system must be protected by insulation.
cost of heating cable
Before purchasing you need to familiarize yourself with the prices of cable.In different areas it can cost in different ways, but the average price remains unchanged, it is equal to 2 rub. / M.Do not buy a product, without checking whether it meets the established state standards, so the cable is produced according to the standards 12.1.013-78.
Conducting concrete processing after warming
Many builders are wondering whether we can manipulate cutting or drilling concrete after he gains strength.This issue is caused by the fact that at the time of the stop is not yet warm design brand strength gains.The answer to this question can be positive, but with some reservations.Cutting though possible, but to produce unacceptable impacts.As the most suitable solution with the use of the diamond tool acts.Thus, when used in this stage, diamond drilling, the holes in the concrete acquire a straight edge and cracks will not occur.Moreover, if the body is to drill through concrete diamond bit, then change the tool at the time of the valve do not have to overcome is true for concrete.
Warming concrete wire PNSV scheme which have styling in this article can be produced by its original winding on a steel frame, and the need to ensure the absence of tension.You can simply lay between the elements of the metal frame.It should be remembered that the cord should not touch the surface of the formwork, protrude from the body of the concrete after pouring it too should not be.
heating wire can be installed only after the tab has been made of the reinforcing frame, it is not necessary to start carrying out these works, and until such time as embedded elements will not appear in the space enclosing structure.Welding work should also be completed by that time.Soak concrete wire PNSV scheme stacking is shown in the figure, must not continue after the curing solution within 50%.
heat that comes from the core, should be able to heat the solution up to 40-800 0C.Period until the mixture attains full strength, will depend on the characteristics of the object, and usually takes about three days.Warm-up station must operate at intermittent or long-term basis.Step between the wires should not be higher than 15 mm.
Calculation of concrete heating wire PNSV presented in the article, but its enforcement does not give a complete success.After all, it is important to take into account the mounting technology, which involves the elimination of contact wire or intersection.In order to be able to control the temperature in the grout structures necessary to make special wells.Process should not start until the warm-up until the solution is completely stowed, as it is contrary to safety reasons, moreover, it can damage the wire.It is preferable to entrust the carrying out of such work in the art, since the installation of the cable is accompanied by certain difficulties and requires a master skills in the conduct of such manipulations.
calculations were performed for heating concrete
In view of the above, we can conclude the following: for 1 m3 of concrete will need to spend about 55 m cable.In order to calculate the wire, it is necessary initially to find out how much of the solution is poured into the formwork.Thus, a mixture of 20 m3 have to buy 1,100 meters.
general construction work is preferable to carry out during the warmer months, it is especially true for private developers.As a rule, maintenance pouring concrete in cold period is due to the need to pass the object to a specific time.Such work within the home construction involve additional costs for the acquisition of antifreeze additives, heating cables and other things.And labor costs in winter by pouring concrete are much more difficult because the batch comes as the subsequent distribution of the mixture according to the formwork.