Bituminous composition solid at ambient temperature

A bituminous composition comprising at least:

• a) a bitumen base,
• b) a first chemical additive chosen from compounds of general formula (I):
• Ar1-R1-Ar2 (I)
• wherein:
• Ar1 and Ar2 represent, independently of one another, an aromatic group comprising from 6 to 20 carbon atoms chosen among a benzene nucleus or a system of condensed aromatic nuclei, said hydrocarbon group being substituted by at least one hydroxyl group and optionally by one or more C1-C20 alkyl groups, and
• R1 represents an optionally substituted hydrocarbon divalent radical, the main chain of which comprises from 6 to 20 carbon atoms and at least one group chosen from the amide, ester, hydrazide, urea, carbamate and anhydride functional groups,
• c) a second chemical additive chosen from the reaction products of at least one C3-C12 polyol and of at least one C2-C12 aldehyde.