Bituminous composition in the form of granules and method for preparing same
AssigneeEiffage Travaux Publics
InventorsSerge KRAFFT, Frederic LOUP
Life of this patent
Estimating the term…
Abstract
Disclosed is a bituminous composition in the form of granules, each granule including a core and a coating and having a mass for approximately one hundred particles of from 0.5 g to 2 g, the core including from 40 wt. % to 60 wt. % of a binder matrix; from 30 wt. % to 40 wt. % of a polymer; from 4 wt. % to 6 wt. % of a compatibilizing agent; and from 2 wt. % to 15 wt. % of an anti-adhesive filler; and the coating including an anti-sticking agent. The invention relates also to a method for preparing the composition, and to the use thereof in bitumen plants.
Claims20
Method for preparing granules comprising a binder matrix composition, comprising the following steps:
- a. providing from 40 wt. % to 60 wt. % of a binder matrix, from 30 wt. % to 40 wt. % of a polymer, from 4 wt. % to 6 wt. % of a compatibilizing agent, and from 3 wt. % to 15 wt. % of an anti-adhesive filler;
- b. micronizing the polymer in the presence of the compatibilizing agent to form a preparation comprising micronized polymer having polymer particles with a diameter of from 250 μm to 1000 μm;
- c. adding the binder matrix to said preparation comprising micronized polymer obtained in step b. to form a mixture comprising binder matrix;
- d. adding the anti-adhesive filler to said mixture comprising binder matrix obtained in step c. to form a core;
- e. formulating the core obtained in step d. to a pre-granulated product;
- f. drying the pre-granulated product;
- g. coating the pre-granulated product with an anti-sticking agent;
- wherein step b. is carried out at a temperature of less than or equal to 60° C., and steps c. and d. are carried out at a temperature of from 130° C. to 200° C.
Binder matrix composition in the form of granules, each granule comprising a core and a coating and having a mass for approximately one hundred particles of from 0.5 g to 2 g, the core comprising:
- from 40 wt. % to 60 wt. % of a binder matrix;
- from 30 wt. % to 40 wt. % of a polymer;
- from 4 wt. % to 6 wt. % of a compatibilizing agent;
- and
- from 2 wt. % to 15 wt. % of an anti-adhesive filler;
- and the coating comprising an anti-sticking agent.
Dependencies are inferred from the claim text.