Hot-in-place asphalt recycling machine and process
US6769836B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jul 30, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2301/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for providing hot-in-place recycling and repaving of an existing asphalt-based pavement, in which the pavement is first heated. The heated pavement surface is then sacrified, and new aggregate is dispensed onto it, to form a recycled, preheated asphalt and aggregate mixture. This mixture is again heated and scarified to premix it, and a new pavement surface is now milled to grade and width by applying this mixture using a plurality of extension mills having a main frame. The pavement surface is then remilled to grade using a main mill. Rejuvenator fluid is introduced in the main mill, and mixed with the recycled asphalt and aggregate mixture. Rejuvenator fluid is also introduced into a pug mill and again mixed with the recycled asphalt and aggregate mixture. The rejuvenator-enriched, recycled asphalt and aggregate windrow thus formed is then laid to grade using one or more screeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.