Process for strengthening and sealing geological formations

Hydraulic and earth engineering – Earth treatment or control – Chemical

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166295, E02D 312

Patent

active

047610999

ABSTRACT:
The present invention is directed to a process for strengthening and sealing geological formations which are moist or contain water, in particular loose stone, by the injection of a mixture which reacts to form polyurethane, characterized in that a polyisocyanate component is injected before injection of the reaction mixture.

REFERENCES:
patent: 3623330 (1971-11-01), Nakade et al.
patent: 3698196 (1972-10-01), Jankowski et al.
patent: 4113014 (1978-09-01), Kubens et al.
patent: 4114382 (1978-09-01), Kubens et al.
patent: 4452551 (1984-06-01), Arndt et al.
patent: 4454252 (1984-06-01), Meyer
patent: 4475847 (1984-10-01), Cornely et al.
patent: 4497595 (1985-02-01), Meyer et al.
F. Meyer, Reactive Kunstharze In Bergbau Gluckauf, V. 117, 1981, pp. 831 et seq.

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