Asphalt plant adapted for the batch production of asphalt mix containing recycle asphalt paving
US5251976A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Apr 6, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2019/1095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An asphalt production plant which is adapted to process mixtures of recycled paving and aggregate, and which comprises a rotary drum dryer for heating and drying stone aggregate, and an elevator for conveying the heated and dried aggregate to an elevated discharge location. A batch tower is positioned adjacent the elevator, and the batch tower comprises an aggregate sizing screen which receives and segregates the aggregate by size, and several underlying aggregate storage bins, with each aggregate bin receiving aggregate of predetermined average size from the sizing screen. Also, a recycle bin is positioned between and in alignment with the aggregate bins. A weigh hopper is provided for receiving the aggregate and/or recycle material from the bins, and a pugmill is positioned below the weigh hopper for mixing the material with hot liquid asphalt and then delivering the resulting mix into an underlying truck. A gate is provided for delivering the material from the elevator into either the sizing screen or the recycle bin. In addition, a weigh belt conveyor is provided for delivering the aggregate to the drum dryer at a predetermined feed rate by weight, and a weigh belt conveyor is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.