Sodium Aluminate Activation of Non-ferrous Waste Foundry Sand: A Feasibility Study

Abstract The study was conducted to investigate the feasibility of sodium aluminate activation nonferrous waste foundry sand. aim solidify sand via geopolymerisation into useful civil engineering materials. Green mixed with make a paste which filled 50 × mm 3 mold. mixture cured in an oven for 5 days. concentration aluminate, granulated blast furnace slag (GBFS) : (WFS) ratio, liquid solid ratio (L/S) and temperature were varied respectively establish optimum curing conditions. results indicated that has high potential be used as alkaline activator synthesis WFS geopolymers. geopolymer prepared 6 M yielded highest UCS 3.59 MPa after days did not meet minimum requirements ASTM C34-13, C129-14a South African standard (SANS227: 2007). addition GBFS mix design enhanced mechanical strength modified 50% GBFS, 4M L/S 0.15 at 80°C 10.57 MPa. met also show a, ability valorise reduce building material problems, while providing construction industry inexpensive new raw less CO 2 emissions.