Three-layered road structure
US6089783A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1999 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C7/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns a novel road structure whose bearing part on top of the ground comprises three successive layers of bituminous material bonded with one another, namely: a base layer which rests on the ground with optional insertion of a forming layer of thickness H.sub.i such that: 4 cm.ltoreq.H.sub.i .ltoreq.10 cm, and of elastic modulus: E.sub.i ; a median layer of thickness H.sub.m such that: 4 cm.ltoreq.H.sub.m .ltoreq.20 cm, and of elastic modulus E.sub.m such that: 2000 MPa<E.sub.m <8000 MPa; and a top layer of thickness H.sub.s such that: 4 cm.ltoreq.H.sub.s .ltoreq.10 cm, and of elastic modulus E.sub.s, such that elastic moduli of said layers comply with inequality relationships (a) and (b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.