Means for reducing the friction between a prestressing cable and its sheath (jacket) during the tensioning of the said cable in the field of prestressed concrete

摘要

The subject of the invention is a process for reducing the friction between a prestressing cable and its sheath (jacket) during the tensioning of the cable in the field of prestressed concrete. According to this method, the sheet constituting the sheath (jacket) is subjected, at least over that surface of this sheet which is directed towards the interior of the sheath (jacket), to a phosphatising treatment and a layer of a friction-reducing agent, preferably a mixture of soluble alkaline soaps, is included on the phosphatised surface. <IMAGE>