Elemental Oxide Soil sample RHA (%) Cement (%)
SiO2 54.1 80.30 21.60
Al2O3 42.10 2.68 5.90
Fe2O3 0.011 3.90 2.70
CaO 0.004 3.00 64.32
MgO - 1.68 1.72
LOI - 12.74 1.17