Procedure for preparing a covering of concrete pipes. (Machine-translation by Google Translate, not legally binding)

摘要

Process for preparing a coating in concrete pipes, continuous and integral on the internal surface of said concrete pipes, characterized in that it comprises to disintegrate into particles a resinous composition consisting of an epoxy resin, a fraction of coal tar containing pitch and sufficient material containing finely divided silica to give the composition a mastic consistency and projecting said particles directly onto said inner surface with sufficient force to deform the surface of the pipe; impregnate such a surface and penetrate it while the concrete is still in a wet and unhealed state, and then cure the concrete and set the resin to form said solid coating. (Machine-translation by Google Translate, not legally binding)