Method for manufacturing a road pavement comprising a heat exchanger device

A method for manufacturing a road pavement comprising at least one pipe of a device for a heat exchanger, comprising the following steps of:

• a) digging a course of the road pavement and creating grooves extending in a same direction without crossing each other, and strips connecting the grooves two by two,
• wherein the grooves have a width ranging from 0.8d to 2.5d and a depth ranging from 0.8d to 3d, d is the diameter of the pipes of the device for a heat exchanger;
• and then
• b) laying the pipe into the grooves and the strips created in step a), comprising forming sections connected by bends,
• wherein the grooves receive the sections and the strips receive the bends, and
• wherein the pipe has a crushing strength higher than 2 000N per linear metre of pipe at 100° C.;
• and then
• c) filling the empty space left free by the pipe in the grooves with an asphalt mix based on:
• a hydrocarbon binder,
• at least 90% by weight, with respect to the total weight of the asphalt mix, of an aggregate fraction the elements of which have dimensions between 0 mm and 10 mm,
• wherein said aggregate fraction comprising from 30% to 60% by weight, with respect to the total weight of the aggregate fraction, of elements having dimensions between 0 mm and 2 mm, and
• wherein said asphalt mix has a working temperature lower than 160° C.,
• d) applying a surface course for a road pavement.