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Projektowanie materiałowe kompozytu z odpadami poliestrowo-szklanymi

Jastrzębska M., Blokus-Roszkowska A.

Przemysł Chemiczny

2015

T. 94, nr 6

1003-1007

Przedstawiono model materiałowy kompozytu poliestrowego z odpadami poliestrowoszklanymi oraz mączką dolomitową. Model został zbudowany na podstawie wyników doświadczeń i ich statystycznej analizy. Jakość dopasowania modelu oceniono przez wyznaczenie współczynników determinacji. Oceniono wpływ składników na wybrane właściwości kompozytu i zaproponowano funkcję optymalizacji pozwalającą na dobór optymalnego składu kompozytu.

Polyester matrix composite was modified by addn. of glass fiber-reinforced polyester composite waste (grain size below 7.0 mm) and dolomite powder, cured and studied for compressive and flexural strengths and water absorption. Synergy between the polyester resin and the recyclate resulted in a decrease in mech. properties and increase in H₂O absorption. The recyclate content optimization functions were derived.

An analysis of the chemistry, mineralogy and texture of waste dolomite powder used to identify its potential application in industry

Gruszecka-Kosowska A., Wdowin M., Kosowski T., Klimek A

Geology, Geophysics and Environment

2015

Vol. 41, no. 4

343--352

In this work, characterization of dolomite powder was carried out in order to specify possible industrial applications. After the technological use of dolomite aggregates, the remaining fine powder becomes a waste. Raw and calcined powder samples were subject to mineralogical, textural and chemical studies involving leaching tests. The results of the calcination process indicate that the carbonate minerals present in the material sample undergo complete decomposition to form oxides. After the calcination, the material is practically non-porous, and its surface area is more than five times lower than that of the raw material. However, due to the high content of calcia in the calcined sample (CaO > 45% wt.), the material cannot be used as an additive in cement. The leaching tests showed that the concentration of metals released from the dolomite powder is low enough to classify the material as hazardous waste according to the TCLP test. Moreover, the concentration of metals that can get into the environment does not exceed permissible values as set by Polish law. Thus, it is recommended and justified to carry out detailed tests for the purpose of environmental protection; i.e. wet flue gas desulfurization, heavy metals absorption, and CO2 capture.