Bituminous product and process for preparing it
The subject of the present invention is a process for preparing a bituminous product, characterized in that a compound based on a phosphoric or polyphosphoric acid supported on a mineral oxide of high porosity is used. The subject of the invention is also the bituminous product that can be obtained by the above process, and its uses.
1. A method for preparing a bituminous product comprising the steps of:
heating bitumen to a temperature of from about 110° C. to about 200° C.; and
adding a sufficient amount of the composition comprising:
an acid component selected from the group consisting of phosphoric acid, polyphosphoric acid, and combinations thereof; and
a mineral oxide support component, wherein the mineral oxide is a high porosity mineral oxide;
to said bitumen while stirring to obtain a bituminous product having improved crack resistance and deformation properties.
2. The method of claim 1 , wherein the bitumen comprises natural bitumens, pyrobitumens, artificial bitumens, asphalt, maltha, or combinations thereof.
3. The method of claim 2 , wherein the bitumen further comprises an additive selected from the group consisting of elastomers, plastomers, or other chemical agent.
4. A method for preparing a bituminous product comprising the steps of:
heating bitumen to a temperature of from about 110° C. to about 200° C.; and
adding a sufficient amount of the composition comprising:
an acid component selected from the group consisting of phosphoric acid, polyphosphoric acid, and combinations thereof; and
a mineral oxide support component, wherein the mineral oxide is a high porosity mineral oxide;
to said bitumen while stirring to obtain a bituminous product having improved crack resistance and deformation properties; and
adding aggregates into the mixture while stirring.
5. A method for preparing a bituminous product comprising the steps of:
mixing water bitumen, and an emulsifier at a temperature from about 15° C. to about 25° C.;
adding a sufficient amount of the composition comprising:
an acid component selected from the group consisting of phosphoric acid, polyphosphoric acid, and combinations thereof; and
a mineral oxide support component, wherein the mineral oxide is a high porosity mineral oxide;
to said bitumen while stirring to obtain a bituminous product having improved crack resistance and deformation properties;
spreading the emulsion in order to obtain a uniform layer;
drying the emulsion; and
breaking the bitumen emulsion.
6. The method of claim 5 , wherein the method further comprises the step of adding aggregates to the bitumen emulsion after addition of the composition comprising:
an acid component selected from the group consisting of phosphoric acid, polyphosphoric acid, and combinations thereof; and
a mineral oxide support component, wherein the mineral oxide is a high porosity mineral oxide;
and stirring.
7. A method for preparing a bituminous product comprising the steps of:
heating bitumen to a temperature of from about 110° C. to about 200° C.; and
adding a sufficient amount of the composition comprising:
an acid component selected from the group consisting of phosphoric acid, polyphosphoric acid, and combinations thereof; and
a mineral oxide support component, wherein the mineral oxide is a high porosity mineral oxide;
to said bitumen while stirring to obtain a bituminous product having improved crack resistance and deformation properties;
mixing with water, and an emulsifier;
spreading the emulsion in order to obtain a uniform layer;
drying the emulsion; and
breaking the bitumen emulsion.
8. The method of claim 7 , farther comprising the step of cooling the bitumen emulsion to room temperature then adding aggregates while stirring.