Design and Control of Concrete Mixtures P 251-360 | PDF ...
The blankets can also be used to thaw subgrades or concrete foundations. Use of electrical resistance wires that are cast into the concrete is another method. The power supplied is under 50 volts, and from 7.0 to 23.5 MJ (1.5 to 5 kilowatt-hours) of electricity per cubic meter (cubic yard) of concrete is required