1511. Tehnične smernice za ohranjanje in rabo genskih virov : dolgopecljati, poljski in gorski brest = Ulmus laevis, Ulmus minor, Ulmus glabraDušan Jurc, Petra Košir, Robert Brus, Gregor Božič, 2012, strokovni članek Ključne besede: genski viri, drevesne vrste, tehnične smernice, brest, dolgopecljati brest, Ulmus leavis, poljski brest, Ulmus minor, gorski brest, Ulmus glabra, Slovenija
Objavljeno v DiRROS: 20.12.2023; Ogledov: 273; Prenosov: 75
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1514. Tehnične smernice za ohranjanje in rabo genskih virov : črna, siva in zelena jelša = Alnus glutinosa, Alnus incana, Alnus viridisHojka Kraigher, Robert Brus, Franc Batič, 2011, strokovni članek Ključne besede: genski viri, drevesne vrste, tehnične smernice, črna jelša, Alnus glutinosa, siva jelša, Alnus incana, zelena jelša, Alnus viridis, Slovenija
Objavljeno v DiRROS: 20.12.2023; Ogledov: 303; Prenosov: 80
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1517. Tehnične smernice za ohranjanje in rabo genskih virov : maklen, trokrpi javor in tatarski javor = Acer campestre, Acer monspessulanum, Acer tataricumJože Bavcon, Gregor Božič, Lado Kutnar, Boštjan Košiček, 2011, strokovni članek Ključne besede: genski viri, drevesne vrste, tehnične smernice, javor, maklen, poljski javor, Acer campestre, trokrpi javor, Acer monspessulanum, tatarski javor, Acer tataricum, Slovenija
Objavljeno v DiRROS: 20.12.2023; Ogledov: 307; Prenosov: 79
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1520. Effect of the cooling regime on the mineralogy and reactivity of belite-sulfoaluminate clinkersSabina Dolenec, Katarina Šter, Maruša Mrak, Klara Žagar, Andrej Ipavec, Lea Žibret, 2020, izvirni znanstveni članek Povzetek: This study investigated the influence of different cooling regimes on the microstructure and consequent reactivity of belite-sulfoaluminate clinkers. The cement clinkers were synthesized by incorporating secondary raw materials, such as titanogypsum and bottom ash, to the natural raw materials. Clinker phases were determined by Rietveld quantitative phase analysis, while the distribution morphology and the incorporation of substitute ions in the phases were characterized by scanning electron microscopy using energy-dispersive X-ray spectroscopy (SEM/EDS). Clinker reactivity was studied using isothermal calorimetry and was additionally investigated through compressive strength, which was determined for the cement prepared from the synthesized clinkers. X-ray diffraction analysis showed that, as well as the three main phases (belite, calcium sulfoaluminate, and ferrite), the clinkers contained additional minor phases (mayenite, gehlenite, arkanite, periclase, and perovskite), the ratios of which varied according to the cooling regime utilized. Microscopic observations indicated that the cooling regime also influenced the crystal size and morphology of the main phases, which consequently affected clinker reactivity. Furthermore, a smaller amount of substitute elements was incorporated in the main phases when cooling was slowed. Results showed that, in comparison to clinkers cooled at slower rates, air quenched clinkers reacted faster and exhibited a higher compressive strength at 7 days.
Ključne besede: clinkers, belite, calcium sulfoaluminate, cooling, microstructure, reactivity
Objavljeno v DiRROS: 20.12.2023; Ogledov: 280; Prenosov: 125
Celotno besedilo (4,18 MB)
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