Abstract
This article presents the results of a theoretical study of the impact of the density of monolithic expanded clay concrete on the specific energy consumption in the operation of the cottage building in conditions of intermittent heating. In view of the fact that the outer walls are made in the form of well masonry of various materials, in order to simplify the solution of the problem, averaging of their main thermal characteristics is made. In determining the effect of heating the outer wall and the specific energy used the author's approximate analytical method, convenient for engineering calculations. The study showed that the use no-fine expanded-clay lightweight concrete significantly reduces the specific energy consumption compared to conventional large-porous expanded clay. The lowest energy consumption according to the calculation results refers to the minimum density of sandless no-fine expanded-clay lightweight concrete, equal to 300 kg/m3.
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