Foaming additive with low ecotoxicological impact for soil conditioning in the presence of mechanised excavation
AssigneeMapei S.P.A.
InventorsMassimo Stefanoni, Marco Squinzi, Carlo Pistolesi, Enrico Dal Negro, Alessandro Boscaro
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Abstract
The present invention relates to the use of foaming additives in liquid, paste or powder form, to condition soil excavated with a tunnel boring machine. Said additives can be classified as readily biodegradable and are characterised by a lower ecotoxicological impact than commercial products.
Claims5
A method of generating a foam starting from a soil conditioning additive in liquid, paste or powder form, said foam being able to condition soil during mechanised excavations with a tunnel boring machine, said soil conditioning additive comprising a salified alkyl ether sulphate surfactant having a straight or branched C7-C11 alkyl chain and a degree of ethoxylation ranging from 7 to 9, from 5 to 50% by weight of the surfactant of an acyl glutamate and from 10 to 50% by weight of the surfactant of alkyl polyglucosides
- said method comprising
- adding said salified alkyl ether sulphate surfactant to an aqueous solution used during said mechanised excavations;
- and
- generating said foam.
Dependencies are inferred from the claim text.