STRENGTHENED CLAY PRIMER Russian patent published in 2017 - IPC E02D3/12 C04B28/08 C04B111/20 

FIELD: construction.

SUBSTANCE: strengthened clay soil contains cohesive soil - loam or clay, binder - blend of blast-furnace or steel-smelting slag with blast-furnace slurry in a ratio of 9:1 and water to provide the required moisture, optimal for compaction, the mass ratio of soil to binder being in the range of 1:9 to 9:1. Domain sludge is used of the following chemical composition, wt %: C_total - 10.0-30.0, Fe_total - 20.0-50.0, SiO₂ - 6.0-19.0, CaO 6.0-16.0, MgO 1.0-2.5, Al₂O₃ - 1.0-2.0, MnO - 0.13-0.3, Na₂O - 0.5-1.1, K₂O - 0.2-1.0, Zn_total - 0.01-0.03, S_total - 0.1-1.0, pp. - 1.0-1.8.

EFFECT: increase in strength, frost resistance and uniformity of strengthened clay soil, as well as utilisation of waste generated in the production of cast iron.

2 cl, 10 tbl, 4 ex