UNI-MB - logo
UMNIK - logo
 
(UM)
  • Effects of hazardous clay additives and temperature fluctuation on safety of mountable brick cielings [Elektronski vir]
    Lubej, Samo, 1958- ; Lutar, Boris
    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 etringite mineral (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 etringite mineral and brick filling without the mineral 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.
    Vir: Rethinking and revitalizing construction safety, health, environment and quality [Elektronski vir] (Str. 585-595)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2005
    Jezik - angleški
    COBISS.SI-ID - 9613334

Vnos na polico