Abstract
The study deals with basic properties and area of application of lightweight concrete of continuous structure without fine aggregate. When fine aggregate is excluded from the concrete structure, it becomes lightweight, has lower thermal conductivity and cost, simpler production technology. It also has durability sufficient for wall panels, water resistance, frost resistance and a number of other indicators. The paper describes additives used for concrete air entrainment. Using these additives does not complicate the production technology of panels, the panels can be easily transported and have sufficient stability and durability upon storage. The article justifies effective application of light concrete with continuous structure without fine aggregate in low-rise construction. Light concretes of continuous structure without fine aggregate allow to completely exclude the use of fine aggregate, to sharply reduce density and thermal conductivity of concrete, as well as to reduce moisture content and humidity of products, improve their cohesion and workability and get a number of other benefits. The study shows that light concrete without fine aggregate numerous advantages prove that it will be used in construction practice for a long time.
Highlights
The production organization of multilayered wall panels is associated with a deep technological process restructuring, as well as the need to provide the production with expensive thermal insulation materials
Reduction of lightweight concrete density and, as a result, its thermal conductivity occurs with lightweight aggregate content increase and its density and solution component decrease, which can be achieved by its porosity
The most common are single-layer wall panels, because they are characterized by simple manufacturing technology and low cost
Summary
The production organization of multilayered wall panels is associated with a deep technological process restructuring, as well as the need to provide the production with expensive thermal insulation materials. Under these conditions, it is obvious that there is a need to find effective ways to increase the thermal insulation capabilities of single-layer structures [1-6]. Single-layer walls of concrete are vapor permeable. Three-layered walls contain vapor-proof insulation in the middle layer, and the creation of \ healthy microclimate in the premises is impossible without the organization of forced ventilation and air humidity regulation in the building by installing an airconditioning system. The microclimate deteriorates sharply, the humidity of air and constructions increases greatly, a number of diseases of the circulatory and respiratory organs occur; the immune system is suppressed; allergic reactions in the body take place, and the saved heat leaves through the ventilation pane during rooms airing
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