Abstract: A foaming agent, more particularly for the foaming of a building material/binder paste for producing pory lightweight-construction and insulating materials, is improved in terms of its stability and usefulness at relatively low outdoor temperatures. The foaming agent in the form of an aqueous-organic solution comprises or consists to an extent of at least 85 wt % of the following constituents: a) a surfactant component which comprises at least one foam-forming ionic surfactant, b) a fatty alcohol component which comprises at least one fatty alcohol and at least one ethoxylated fatty alcohol in a FA/FAEO mixing ratio of 95:5 to 0:100, c) a glycol component which comprises at least one constituent of the group of alkyl glycols, alkylene glycols up to C6 alkyl, diglycols, especially alkyl diglycols and diglycol ethers, and water.

Abstract: A foaming agent is used for foaming a building material binder paste or a building material slurry for producing porous lightweight-construction and insulating materials. On curing of the foamed slurry, the foam bubbles generate pores in the building material. The foam obtained from the foaming agent is stabilized using a long-chain or medium-chain polycarboxylate ether (PCE). The foaming agent includes a foam-forming ionic surfactant component, at least one fatty alcohol and at least one PCE in an aqueous-organic solvent which is selected from the group of alkyl glycols, alkylene glycols up to C6 alkyl, diglycols and diglycol ethers, and also, optionally, up to a maximum of 20 wt %, based on the mixture, of further ingredients.

Abstract: A track structure for railborne vehicles comprising a bed on which rails fastened to sleepers are seated. The structure comprises a concrete trough seated on a substructure and having walls extending in the longitudinal direction. The side walls are spaced apart parallel to one another at least by a sleeper length. A method of manufacturing of the structure is also provided.