Fibrous additive for asphalt paving compositions
US5897950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention describes a fiber material for use in mastic asphalt in roadbuilding for stabilizing the binder during transport, storage and incorporation, said fiber material being a macromolecular product including at least 95% of polyethylene terephthalate, the diameter of the individual fibers being .gtoreq.0.1 mm, the length to diameter ratio exceeding 5 on average, and the particle size distribution, measured as sieve passthrough as per the draft code of practice for the supply and testing of stabilizing materials in asphalt road construction in line with TP Min-StB Part 6.3.2, producing a proportion of at least 90% for the fractions .ltoreq.0.71 mm and at least 70% for the fractions .ltoreq.0.4 mm, and this product being manufactured by comminution from waste materials based on polyethylene terephthalate monofilaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.