Method for the burying of tubular elements and mortar composition for carrying out this method

摘要

The procedure, especially for laying plastic gas pipes (2), consists of excavating a trench (1) and holding the pipe down with metal arches (7) while the trench is back-filled with a mortar (6), the arches leaving sufficient room for the pipe to rise and create a gap underneath that if filled with the liquid mortar. The procedure, especially for laying plastic gas pipes (2), consists of excavating a trench (1) and holding the pipe down with metal arches (7) while the trench is back-filled with a mortar (6), the arches leaving sufficient room for the pipe to rise and create a gap underneath that if filled with the liquid mortar. The mortar is designed to be self-compacting, chemically inert relative to the plastic pipes, resistant to frost when set, and able to withstand a pressure of at least 2 MPa; it can contain natural and/or synthetic fibres and is mixed with a water/ cement ration of between 0.8 and 2 : 1.