Process for subsurface reconstruction of buildings reinforced with constructional steel

Abstract From the Canadian patent

For the subsurface reconstruction of buildings reinforced with constructional steel that the damaged concrete is drilled into until behind the corroded reinforcement the solution of a, modified alkali silicate having a Me2O: SiO2 ratio of 1:2 to 1:3 being injected into the drilling under pressure and thereafter a cement-water sludge with alkali silicate solution or a mortar mixture being injected under pressure containing 2 to 6% weight relative to the amount of cement of a finely composed amorphous silicic acid with at least 90% by weight SiO2 or finely composed precipitated, active silicates of magnesium calcium, barium or, aluminum with a BET surface of 50 to 200 m2/g and a d50% value …