摘要：Over a two-year period following the construction completion extensive damage has occurred in the mountable brick ceilings at the University of Maribor administrative quarters. The damage of the ceilings consisted in falling pieces of brick filling – construction ceramics, which presented a potential hazard to people. Using the optical as well as electronic microscope methods combined with chemical analysis EDX (Energy Dispersive X-Ray Analysis) we confirmed the presence of the white crystals, which could be mineral ettringite (Al2O33CaSO4 x 32H2O) that can, when present in construction ceramics, cause degradation of matter through expansion. By means of numerical analysis using final elements method and by means of the COSMOS Design STAR 3.0 computer software (by SRAC - Structural Research and Analysis Corporation USA) we were able to experimentally determine effects of temperature fluctuation. The experimentally assessed physical-mechanical characteristics of the material were considered in the numerical analysis. Both cases, brick filling containing the white crystals and brick filling without white crystals were analysed. The safety factor distribution on the model according to Mises demolition hypothesis was shown. It was confirmed on basis of experimental research that the chemical degradation of construction ceramics combined with temperature fluctuation due to climate changes, even without considering degradations due to technological production process, can lead to such damage in the material as to cause a safety hazard.
其他摘要：U konstrukciji montažnih stropova od šupljih opečnih blokova, koji su element ispune između nosivih armiranobetonskih greda, u razdoblju od četiri godine poslije njihove izgradnje došlo je do znatnih oštećenja. Oštećenja stropova manifestirala su se odlam
