Fibre reinforced alkali-activated rock woolPavlin, Majda (Avtor) Horvat, Barbara (Avtor) Ducman, Vilma (Avtor) secondary raw materialalkali activated materialfoaminghomogenizationmechanical strengthMineral wool, i.e. rock and glass wool, represents considerable challenge after its functional-time runs out due to its small density leading to large volume consumption during transport and in landfills where it usually ends. Because rock wool is mineralogically and chemically a promising precursor material for alkali-activation, it was milled from few centimetres-decimeters long fibres to micron-sized fibres. Since fibres in alkali-activated materials generally show an increase in mechanical strength, especially the bending strength, 1 m% of additional fibres (basalt, cellulose (2 types), glass, polypropylene, polyvinyl alcohol and steel fibres) was used in the alkali mixture, that was curred at 40 °C for 3 days. Time dependence of the mechanical strengths of alkali- activated materials with and without additional fibres was followed. Maximal increase of compressive and bending strength after 28 days was reached with polypropylene fibres, i.e. it was 20% and 30% higher than compressive and bending strength of alkali- activated material without additional fibres respectively.University of Maribor, University Press, Faculty of Chemistry and Chemical Engineering20222023-12-21 08:56:33Neznano17626sl© Authors & Potrč, Bogataj, Kravanja, Novak Pintarič, 2022