Based on economic efficiency, another advantage in favor of infrared heat treatment is that it is easier and easier to organize than steam treatment chambers. Infrared heating can be arranged at landfills directly near the facility under construction. This may be necessary in the manufacture of non-standard and large-sized products. The most convenient sources of infrared rays used for the heat treatment of concrete turned out to be tubular, flat and rod electric generators. A tubular generator (heating elements) is a tube with a small diameter up to 10 m long. The inner cavity of the tube is filled with a heat-resistant and electrically insulating mass. A nichrome spiral is inserted inside the metal tube. Their power is 1 kW/m.



They are connected to the network using contact rods located at the ends of the tube. Flat and rod generators are made of ceramic materials — silite and carborundum. Depending on the shape and dimensions of products and structures, both external and internal surfaces can be irradiated with infrared rays. For example, solid products, planar and ribbed, are heated by external irradiation, and multi—cavity panels and slabs are heated by external and internal irradiation. The heat treatment lasts for 6.5-11 hours, depending on the outside temperature and the presence of wind. At the end of the heat treatment, the concrete in the product acquires a strength of at least 60% grade. A very important condition for high-quality heat treatment of concrete with infrared rays is the reduction of moisture loss, i.e. water mixing. For this purpose, the irradiated product is covered with a polyamide film. This is especially important when heat-treating multi-cavity slabs with round voids.



Experiments on heat treatment of farms with a span of 18 m were carried out using this method at one of the landfills near Moscow. Tests have shown that in terms of strength, rigidity and crack opening width, the truss manufactured using infrared heat treatment meets the requirements of current regulations. In construction practice, there are cases when it is especially advisable to use infrared rays. In Moscow, and in many large cities of Russia, we are faced with the so-called "heat curtain". Remember, in winter, in cold weather, when we enter the doors of a metro station or large department stores, we suddenly find ourselves in a warm stream. Isn't it nice? With what gratitude we think of the builders who took care of us! This is the "heat curtain", or "zone" heating of the edges of the room. And this is done with the help of infrared rays. Such a "heat curtain" can be used to heat outdoor restaurants and cafes, terraces and verandas, and summer cinemas. However, in such cases, warming up the floor area alone is no longer enough. It is necessary to evenly irradiate the entire area of the room from above and from the sides. "Zone heating" can also be used on a construction site, where a small warm zone is created. This warm zone can be moved with the entire team along the entire work front. Slot lovers should constantly look for a 1xbet promo code free spins. These codes are frequently released and can grant you 50 to 100 free spins on selected popular slot games. This 1xbet casino promo code offer lets you spin the reels without using your deposited funds, and any winnings from these spins are yours to keep. It’s an excellent way to discover new games, enjoy extended playtime, and potentially score a major jackpot without any additional cost.