Process for consolidation and sealing coal and/or rock, soil and

Details Process for consolidation and sealing coal and/or rock, soil and Process for consolidation and sealing coal and/or rock, soil and

1985-06-05

1987-06-02

Husar, Cornelius J.

Hydraulic and earth engineering

Earth treatment or control

Chemical

523131, 405263, 405258, E02D 312, C09K 700

Patent

active

046699198

ABSTRACT:
The invention relates to a process for consolidating and sealing coal and/or rock, soil and brick formations in mining, tunnelling and construction by reacting polyisocyanates and aqueous alkali silicate solutions in the presence of a catalyst prompting the trimerization of the polyisocyanate. The catalyst is used in an amount of 6.0 to 14.5 mmole per mole of NCO groups in the reaction mixture.
When the reaction mixture is introduced into the coal and/or rock, soil and brick formation to be consolidated and is cured, excellent consolidation results are achieved on account of the formation of an "interpermeated network" of inorganic and organic polymer.

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Stahl, Gluckauf, 104, pp. 666-670 (1968).
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