Tubing for efficiently sealing joints in concrete structures - made of suitable e.g. extruded plastic tubing with e.g. continuous perforated spiral groove in its wall filled with compressible foam

摘要

A rigid or flexible tube for filling joints in concrete structures consists of a liquid-tight tube of any dia. in which a spiral groove is formed or, alternatively, one in which the wall is formed into a spiral structure; radial holes are made in the recess-groove at suitable intervals, and strips of flexible compressible foam are laid continuously into the grooves etc. so that they close off the holes externally but on the other hand they allow an internal pressurised liquid to flow out. ADVANTAGE - The system permits any mass-produced tubing or even plastic or metal tubes to be used for the purpose.