The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1991
Filed:
May. 30, 1989
Francis M Delmas, Paris, FR;
Michel A Gandais, Perthes, FR;
Sondages Injections Forages Entreprise Bachy, Levallois-Perret, FR;
Abstract
A process for producing a barrier seal in soil which must be in contact with an acidic water which has a pH below 5.5 wherein a trench is excavated in the soil and the trench produced is filled with a sealing concrete including water, a clay and an acid-resistant granulate with self-filtering properties, the sealing concrete additionally including an aqueous solution of sodium and/or potassium silicate and is devoid of any acidic or acid-generating matter liable to form a silicic acid gel with the silicate. The proportion of sodium and/or potassium silicate incorporated in the sealing concrete is sufficient to give rise to the formation of a leakproof local barrier when the sealing wall is locally subjected to the percolation of acid water originating from the surrounding soil.