The use as a road binder of a bituminous composition comprising at least: a) a bitumen base, b) a compound of general formula (I): Ar1-R 1 -Ar 2 (I) wherein: - Ar1 and Ar2 represent, independently of each other, an aromatic group comprising from 6 to 20 carbon atoms chosen among a benzene nucleus or a system of condensed aromatic nuclei, said aromatic group being substituted by at least one hydroxyl group and optionally by one or more C 1 -C 20 alkyl groups, and - R 1 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 compound of general formula (II): R 2 -(NH) n CONH-X-(NHCO) p (NH) n -R' 2 (II) wherein: - the R 2 and R' 2 groups, which are identical or different, represent a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and R 2 can be H, - the X group represents a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and - n and p are integers having a value of 0 or 1, independently of each other. a) a bitumen base, b) a compound of general formula (I): Ar1-R 1 -Ar 2 (I) wherein: - Ar1 and Ar2 represent, independently of each other, an aromatic group comprising from 6 to 20 carbon atoms chosen among a benzene nucleus or a system of condensed aromatic nuclei, said aromatic group being substituted by at least one hydroxyl group and optionally by one or more C 1 -C 20 alkyl groups, and - R 1 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, - Ar1 and Ar2 represent, independently of each other, an aromatic group comprising from 6 to 20 carbon atoms chosen among a benzene nucleus or a system of condensed aromatic nuclei, said aromatic group being substituted by at least one hydroxyl group and optionally by one or more C 1 -C 20 alkyl groups, and - R 1 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 compound of general formula (II): R 2 -(NH) n CONH-X-(NHCO) p (NH) n -R' 2 (II) wherein: - the R 2 and R' 2 groups, which are identical or different, represent a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and R 2 can be H, - the X group represents a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and - n and p are integers having a value of 0 or 1, independently of each other. - the R 2 and R' 2 groups, which are identical or different, represent a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and R 2 can be H, - the X group represents a hydrocarbon chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises one or more heteroatoms, such as N, O or S, and - n and p are integers having a value of 0 or 1, independently of each other. <EOS>