CONCRETE

[:ru]Д-р Крефт О.[:en]Dr. Kreft O.[:] [:ru]Технологический и исследовательский центр «Xella», ФРГ[:en]«Xella Technology and Research», Germany[:]

[:ru]Шох Т.[:en]Schoch T.[:] [:ru]Технологический и исследовательский центр «Xella», ФРГ[:en]«Xella Technology and Research», Germany[:]

Alitinform №1 (13) 2010 г. 60-65 p.

Abstract

In recent years, questions emerged about how high level moisture contents might affect heat technical properties in building materials. Yet, existing standards and scientific publications, respectively, do not provide conclusive insights into the area of high rated moisture, since they are valid for the equilibrium moisture area only. Taking calculation instructions of harmonized European standards (EN ISO 10456, DIN EN 1745) as a basis, typical moisture contents of freshly produced AAC would theoretically involve immense surcharges on λ, which would drastically affect thermal conductivities and, in turn, increase heating costs. Moreover, increasing risks of mould formation and other damages would be expected. Our experiments clearly demonstrate that actual increases in λ at production moisture levels are far below values stated in the European standards.