Method for protecting and consolidating calcareous materials

Details Method for protecting and consolidating calcareous materials Method for protecting and consolidating calcareous materials

C - Chemistry, Metallurgy

04

B

C04B 41/46 (2006.01) C04B 41/45 (2006.01) C04B 41/52 (2006.01)

Patent

CA 2349551

Embodiments provide methods for the protection and consolidation of calcareous materials. An exemplary method includes providing an aqueous solution of a hydroxycarboxylic acid, adjusting the pH of the aqueous solution by adding an alkaline agent, and applying the pH-adjusted aqueous solution to a calcareous mineral to form a conversion layer on the mineral. The calcareous mineral may, for example, be carbonate rock, particularly limestone and marble, or may be part of masonry material, aggregates, or fillers. Adherent conversion layers are readily formed at ambient temperatures and, therefore, methods provided are suitable for field application. Conversion layers so formed are provided as further embodiments.

Procédés servant à protéger et à consolider des matériaux calcaires. Un procédé consiste à utiliser une solution aqueuse d'un acide hydroxycarboxylique, à régler le pH de cette solution aqueuse par apport d'un agent alcalin et à appliquer la solution aqueuse au pH réglé à un minerai calcaire afin de créer une couche de conversion sur ce minerai. Ce minerai calcaire peut être, par exemple, une roche carbonée, en particulier de la chaux et du marbre ou une partie d'un matériau de maçonnerie, des agrégats ou des charges. On crée les couches de conversion adhésives à des températures ambiantes et, de ce fait, on peut appliquer ces procédés sur le site. Les couches de conversion obtenues font partie d'autres modes de réalisation.

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