Apparatus and method for a hot mix asphalt plant using a high percentage of recycled asphalt products
US7566162B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 28, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2019/1095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hot mix asphalt plant for producing hot mix asphalt using a high percentage of RAP comprising a first dryer adapted to receive and mix virgin aggregates and RAP fines and a first burner assembly adapted to produce a burner flame and heat and dry the virgin aggregates in the first dryer. The plant also includes a second dryer adapted to receive coarse RAP and a second burner assembly adapted to produce a burner flame and heat and dry the coarse RAP in the second dryer. The plant further comprises a pugmill adapted to receive the virgin aggregates and the RAP fines from the first dryer and the coarse RAP from the second dryer and mix the virgin aggregates, the RAP fines and the coarse RAP to produce hot mix asphalt. The method of the invention includes the steps of providing first dryer, a first burner, a second dryer, and a second burner, conveying the virgin aggregates to the first dryer, heating and drying the virgin aggregates in the first dryer, conveying the RAP fines to the first dryer, mixing the virgin aggregates and the RAP fines in the first dryer, conveying the coarse RAP to the second dryer, heating and drying the coarse RAP in the second dryer, and mixing the coarse R…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.