The present study examines some durability aspects of ambient cured bottom ash geopolymer concrete (BA GPC) due to accelerated corrosion, sorptivity, and water absorption. The bottom ash geopolymer concrete was prepared with sodium based alkaline activators under ambient curing temperatures. The sodium hydroxide used concentration was 8M. The performance of BA GPC was compared with conventional concrete. The test results indicate that BA GPC developes a strong passive layer against chloride ion diffusion and provides better protection against corrosion. Both the initial and final rates of water absorption of BA GPC were about two times less than those of conventional concrete. The BA GPC significantly enhanced performance over equivalent grade conventional concrete (CC).

Głównym celem publikacji jest ustalenie, jaką wiedzę tuż po II wojnie światowej pozyskiwały Polki z prasy na temat sytuacji kobiet i działalności stowarzyszeń feministycznych w Europie i na innych kontynentach? Ponadto jaki obraz funkcjonowania tych organizacji prezentowały organy prasowe Ligi Kobiet? Dzięki zastosowaniu klasycznej metody analizy i krytyki treści prasy oraz pomocniczo metodologii badań monograficznych można znaleźć odpowiedzi na te i podobne pytania. Podjęte badania pokazują, że w tamtym czasie do Polek docierały za pośrednictwem prasy bardzo lakoniczne informacje o roli stowarzyszeń feministycznych w procesie emancypacji kobiet w poszczególnych krajach.

Glacially abraded basaltic rock surfaces found within a Little Ice Age (LIA) foreland of Skálafellsjökull (SE Iceland) were studied at eight sites of different age applying different weathering indices. They include surface micro−roughness parameters measured with the Handysurf E35−B electronic profilometer – a new tool in geomorphology, Schmidt hammer rebound (R−values) and weathering rind thickness. Values of these indices obtained from study sites exposed to subaerial weathering for more than ca. 80 years are significantly different than those from younger moraines closer to the glacier snout. Despite a wide scatter of readings within each study site, there is a significant correlation between the ages and the values of the indices. It is concluded that the micro−roughness parameters provided by the Handysurf E35−B profilometer, Schmidt hammer R−values and weathering rind thickness are robust indices of rock surface deterioration rate in short time−scales. There is mounting evidence that rock surface undergoes relatively rapid weathering during first decades since deglaciation.