TECHNOLOGY DEVICES OF HEAT-INSULATING COATINGS 4. Molded insulation

Molded insulation is designed for industrial furnaces, refrigerators and it is usually carried out from the foam concrete cellular mass. Special foam mass and cement mortar are mixed in a mixer, the resulting ready mass (foam concrete or aerated concrete) is placed with horizontal surfaces in the formwork layers up to 25 cm high over the entire insulated surface, compacted in layers, the outer surface of the insulation is carefully smoothed and leveled. Mats, mats, and other materials are placed on top of the insulated coating on top, and are regularly watered to ensure normal curing conditions.

With vertical insulated surfaces, the foam concrete is applied by gunning on a metal grid that is attached to the insulated surface. Concreting produce stripes up to 1 m, which eliminates the sedimentation of the concrete mass and prevents its expansion. Subsequent vertical concreting strips are performed only upon completion of the concrete setting process of the previous strips.

As a result, the insulation of a given thickness and configuration is obtained, which is tightly attached to the insulated surface and free of defects (cracks, holes).

Works on cast insulation are performed at a temperature not lower than +10 ° C. The process of setting and curing is carried out slowly, critical strength is achieved only after 5 days. After acquiring the design strength of the insulation, a layer of cement mortar with a thickness of 1 ... 2 cm is applied on top and the roll-up waterproofing is glued.

Insulation isolation, high mechanical strength, porosity - the main advantages of cast insulation. As disadvantages, we can note the relatively high density, significant cement consumption, the duration of the device process and insulation insulation, the need to protect the insulation itself from moisture.