| 摘要 |
The use of oil-in-water-type emulsions of fatty acids (C12 to C18) and/or carboxylic acid waxes, with the possible addition of paraffin, with a solid body melting point between 40 and 80 DEG C with the use of non-ionogenic emulsifiers, possibly partly neutralised with lye, amine or ammonia, as an additive in the production of hydrocarbon-absorbent concretes or concrete blocks, and a process for producing hydrocarbon-absorbent or filtering and ecologically decomposing concrete block, in which a light aggregate (S4) for the concrete of the block together with a colouring additive (S5) is hydrophobised in an initial mixing process (M1) with an oil-in-water-type emulsion before being mixed with the customary aggregats for the production of concrete, especially premixed hydrophobic cement glue (S3 + water) and, in a further stage, cast in a mould, whereupon it is vibrated under pressure and shaped to provide a concrete adsorption block or plate. |
