Method for continuous production of modified bituminous materials
US6380284B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 15, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | May 15, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C7/265
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns the continuous production of asphalts modified by the addition of polymers and reacted with sulfur. The binders produced by said methods can contain very high amounts of polymers, also combined with secondary materials such as: rubber, various plastics, and waste lubricants. This type of binder, which cannot be obtained by discontinuous batch technology, is produced by the continuous mixing of several asphalt components through a static mixer. Said binders provide very high-performance asphalts and agents for regenerating old asphalts contained in waste road materials, in the process of hot recycling of coated materials. They are also used for producing novel emulsions of highly modified binders, with multiple applications and in particular for cold recycling. This novel method, by regenerating old asphalt contained in waste coated materials, represents a means for waste conversion and for limiting the use of asphalt and road-surfacing aggregates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.