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Analysis of alkali-activated mineral wool-slag binders : evaluating the differences between one-part and two-part variationsElijah Adesanya,
Rawia Dabbebi,
Christine Rößler,
Majda Pavlin,
Zhenming Li,
Tero Luukkonen,
Juho Yliniemi,
Mirja Illikainen, 2024, izvirni znanstveni članek
Povzetek: Two synthesis pathways (one- and two-part) in alkali-activated binders were compared using ground granulated blast furnace slag (GGBFS), mineral wool (MW) activated using dry and liquid alkali activators with similar Na2O/SiO2 modulus. The effect of activator type on reaction kinetics, strength development, setting times, and durability shows that one-part synthesis does not only improve early strength, but also provide better durability properties. While the highest compressive strength (56 MPa, 90 days) was achieved for the one-part mix (DM), the reaction products (presence of Mg–Al layered double hydroxide and C–S–H-like phases) observed for both mortar mixes were similar. The DM mortars showed better resistance to sulfate attack than two-part mix (WM) mortars and sets faster. The results highlight the significance of the one-part pathways in the synthesis of alkali-activated materials.
Ključne besede: recycling, alkali activated material, mineral wool
Objavljeno v DiRROS: 11.03.2024; Ogledov: 107; Prenosov: 77
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