CLAY-CONTAINING MIXTURE AND BLEND CAPABLE OF FORMING A MOISTURE RESISTANT GEL, AND USE OF THAT MIXTURE AND BLEND

摘要

A clay-containing mixture which comprises a powdered or ground smectite and/ or a smectite-containing natural rock and 1-10 % by weight of a water-soluble polymer, or a blend which additionally comprises a diluting agent, both capable of forming a moisture-resitant gel, in which both the mixture and the blend are dry solids, the blend comprises as diluting agent more than 0.5 % by weight of one or more solid inert filler(s) with an average particle size higher than 0.05 mm, and both the mixture and the blend additionally comprise 0.8-6.0 % by weight of a powdered solid activating agent, all the weight percentages being calculated for the weight of the smectite. The invention relates also to the use of this blend/mixture.