Method for the transportation and/or storage of road bitumen

Process for the transportation and/or storage of road bitumen under cold conditions, said process comprising:

• providing a road bitumen in block form, and
• transporting, and/or storing the road bitumen,
• wherein said road bitumen consists essentially of:
• at least one bitumen base,
• between 0.1% and 7.5% by weight of at least one chemical additive chosen from:
• a compound of general formula (I):
• R1—(COOH)z wherein R1 is a linear or branched, saturated or unsaturated hydrocarbon-based chain comprising from 4 to 68 carbon atoms, and z is an integer ranging from 1 to 4, or
• a compound of general formula (II):
• R—(NH)nCONH—(X)m—NHCO(NH)n—R′ wherein:
• R and R′, which are identical or different, contain a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
• X contains a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising one or more heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
• n and m are integers having, independently of one another, a value of 0 or of 1, and
• optionally, between 0.05% and 15% by weight of an olefinic polymer adjuvant,
• the percentages being given by weight with respect to the total weight of bitumen,
• wherein a ring and ball softening temperature (RBT) of the bitumen is greater than 69° C., and a penetrability of the bitumen is of between 20 and 45 1/10 mm, where the RBT is measured according to standard EN 1427, and the penetrability is measured at 25° C. according to standard EN 1426, and
• wherein the bitumen block is not packaged or is packaged in a material selected from the group consisting of a box having a silicone-based inner wall, and a thermoplastic film.