Process for subsurface reconstruction of buildings reinforced wi

Details Process for subsurface reconstruction of buildings reinforced wi Process for subsurface reconstruction of buildings reinforced wi

1987-12-09

1989-09-19

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 1421, 106 76, 52514, C04B 1204

Patent

active

048677914

ABSTRACT:
For the subsurface reconstruction of buildings reinforced with constructional steel, the damaged concrete is drilled into until behind the corroded reinforcement, a solution of a modified alkali silicate having a Me.sub.2 O:SiO.sub.2 ratio of 1:2 to 1:3 is injected into the drilling hole under pressure and thereafter a cement-water sludge with alkali silicate solution or a mortar mixture is injected under pressure containing 2 to 6% by weight relative to the amount of cement of a finely composed amorphous silicic acid with at least 90% by weight SiO.sub.2 or finely composed, precipitated, active silicates of magnesium, calcium, barium or aluminum with a BET surface of 50 to 200 m.sup.2 /g and a d.sub.5 % value below 20 .mu.m.

REFERENCES:
patent: 1129320 (1915-02-01), Vail et al.
patent: 2879578 (1959-03-01), Ulfstedt
patent: 2944919 (1960-07-01), Morris et al.
patent: 3180746 (1965-04-01), Patton et al.
Heinrich Remy, "Lehrbuch de Anorganischen Chemie," vol. 1, 1952, pp. 421, 735-736.
"Kieselsaure als Verstarkerfullstoff" (Silic acid as a reinforcing filler), pp. 38, 39 and 42.

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