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US 5,501,730 AGranted
Asphalt composition and process for obtaining same
AssigneeBitumar R. & D.
InventorsQuoc Dinh Duong, Rhe/ al Boisvert
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Abstract
In accordance with the present invention, there is provided an asphalt composition which incorporates asphalt in admixture with synthetic or natural rubber and a vulcanizing agent. There is also provided a process for preparing the above asphalt composition. Preferably, the rubber is obtained from waste tires or tubes.
Claims17
A process for obtaining a homogeneous asphalt composition comprising the steps of:
- a) mixing asphalt with synthetic of natural rubber particles at a temperature of from 160.degree. to 200.degree. C. in order to have the paxtides in suspension in the asphalt;
- b) raising the temperature to about 220.degree. to 260.degree. C.;
- c) injecting air under high pressure;
- d) homogenizing the mixture;
- e) incorporating a vulcanizing agent and agitating;
- and
- f) recovering the homogeneous asphalt composition.
4 more elements
A process for obtaining a homogeneous asphalt composition comprising the steps of:
- a) mixing from 60 to 99% by weight of asphalt with 1 to 40% by weight of rubber particles obtained from waste tires or tubes at a temperature of from 160.degree. to 200.degree. C. in order to have the particles in suspension in the asphalt;
- b) heating the mixture at a temperature of about 230.degree. to 250.degree. C.;
- c) injecting air under high pressure;
- d) homogenizing the mixture with a dispersing device;
- e) incorporating 0.01 to 3% by weight of a vulcanizing agent and agitating for about 0.5 to 5 hours;
- and
- f) recovering the homogeneous asphalt composition.
4 more elements
An asphalt composition comprising:
- from 60 to 99% by weight of asphalt;
- from 1 to 40% by weight of synthetic or natural rubber dissolved in the asphalt;
- and
- from 0.01 to 3% by weight of a vulcanizing agent.
1 more element
An asphalt composition comprising:
- 89.9% by weight of asphalt;
- 10.0% by weight of rubber obtained from waste tires or tubes, the rubber being dissolved in the asphalt;
- 0.1% by weight of elemental selenium.
Dependencies are inferred from the claim text.