1. Pellets of material that can be used as a road binder or as a sealing binder,
comprising a core and a coating layer, wherein:
- the core consists of a first composition comprising at least one material chosen
from: a bitumen base, a pitch and a clear binder,
and
- the coating layer consists of a second composition which comprises:
• at least one viscosifying compound, chosen from cellulose ethers, and
• at least one anticaking agent.

2. The pellets as claimed in claim 1, wherein the cellulose ether is chosen from: methylcellulose, ethylcellulose, hydroxymethylcellulose hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), hydroxyethylmethylcellulose (HEMC), hydroxy propyl-methylcellulose (HPMC), hydroxybutylmethylcellulose (HBMC), carboxymethylcellulose (CMC), sodium carboxymethylcellulose (Na-CMC), carboxymethylsulfoethylcellulose, hydroxyethylmethylcarboxymethylcellulose.
3. The pellets as claimed in claim 2, wherein the cellulose ether is chosen from: hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, hydroxybutylmethyl-cellulose, even more advantageously hydroxypropylmethylcellulose.
4. The pellets as claimed in any one of the preceding claims, wherein the second composition comprises at least 10% of one or more anticaking agents, the percentages being expressed by weight relative to the total weight of the second composition.
5. The pellets as claimed in any one of the preceding claims, wherein the anticaking compound is chosen from: talc; fines generally less than 125 urn in diameter, such as siliceous fines, with the exception of limestone fines, sand, such as Fontainebleau sand; cement; carbon; wood residues, such as lignin, lignosulfonate, conifer needle powders or conifer cone powders, in particular of pine; rice husk ash; glass powder; clays, such as kaolin, bentonite or vermiculite; alumina, such as alumina hydrates; silica; silica derivatives, such as fumed silica, functionalized fumed silica, in particular hydrophobic or hydrophilic fumed silica, pyrogenic silicas, in particular hydrophobic or hydrophilic pyrogenic silicas, silicates, silicon hydroxides and silicon oxides; plastic powder; lime; hydrated lime; plaster; rubber crumb; polymer powder, where the polymers are such as styrene/butadiene (SB) copolymers or styrene/butadiene/styrene (SBS) copolymers; and mixtures of these materials.

6. The pellets as claimed in any one of the preceding claims, wherein the first composition has a needle penetrability measured at 25°C according to the standard EN 1426 of from 5 to 330 1/10 mm, preferably from 10 to 220 1/10 mm.
7. The pellets as claimed in any one of the preceding claims, wherein the first composition also comprises at least one chemical additive chosen from: an organic compound, a paraffin, a polyphosphohc acid, an adhesion dopant, and mixtures thereof.
8. A process for manufacturing pellets of material that can be used as a road binder or as a sealing binder, composed of a core and a core coating layer an claimed in any one of the preceding claims, this process comprising:
i) shaping the core from a first composition comprising at least one material chosen from: a bitumen base, a pitch and a clear binder,
ii) coating the core on all or part of its surface with a second composition comprising at least one viscosifying compound chosen from cellulose ethers and at least one anticaking agent.
9. The process as claimed in claim 8, wherein the second composition is applied to the core of the pellets in a fluidized air bed device.
10. The pellets as claimed in any one of claims 1 to 7, which show stability on transportation and/or storage and/or handling at a temperature ranging up to 100°C, advantageously from 20°C to 90°C, preferably from 20°C to 80°C, more preferentially from 40°C to 80°C, even more preferentially from 40°C to 60°C, for a period of greater than or equal to 2 months, preferably greater than or equal to 3 months.
11. The use of the pellets as claimed in any one of claims 1 to 7 and 10, as a road binder.
12. The use as claimed in claim 11, for manufacturing bituminous mixes.
13. A process for manufacturing bituminous mixes comprising at least one road binder and aggregates, the road binder being chosen from the pellets as claimed in any one of claims 1 to 7 and 10, this process comprising at least the steps of:

- heating the aggregates to a temperature ranging from 100°C to 180°C, preferably from 120°Cto160°C,
- mixing the aggregates with the road binder in a tank such as a mixer or a mixing drum,
- obtaining bituminous mixes.

14. The process as claimed in claim 13, which does not comprise a step of heating the road binder before it is mixed with the aggregates.
15. A process for transporting and/or storing and/or handling material that can be used as a road binder or as a sealing binder, said material being transported and/or stored and/or handled in the form of pellets as claimed in any one of claims 1 to 7 and 10.