Improvement of treated spent pot lining reactivity in cementitious material by calcination

Treating spent pot lining by the Low Caustic Leaching and Liming (LCLL) process creates an inert non-hazardous residue called LCLL Ash. Ground as a fine powder calcined, Ash showed pozzolanic behavior in cement. The effect of calcination temperatures on reactivity was studied compressive strength activity index, Frattini tests, RILEM R 3 followed XRD analysis. When calcinating at below 800 °C, no differences were seen between calcined non-calcined At formation nepheline caused alkalis uptake, showing slightly lower than cement 112 days. Beyond °C up to 1200 manifested better amorphization phases increased reactivity, similar Finally, neither delay hydration nor hydroreactivity observed with starting °C. • Effect temperature studied. Calcination does not improve reactivity. improves alkali uptake. 1000 shows Portland Calcined showcases new way produce more sustainable binder.