Stress absorbing composite for road repair and method
AssigneeThe Board of Trustees of the University of Illinois
InventorsBarry J. Dempsey, Muhammad T. Mukhtar, Douglas M. Senso
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Abstract
The present invention provides a stress absorbing composite for road repair that comprises a low stiffness geotextile, a viscoelastic material disposed over the low stiffness geotextile, and a high stiffness geotextile disposed over the viscoelastic material. Also provided is a method for retarding reflective cracking in an overlay using a stress absorbing composite and a repaired road containing a stress absorbing composite.
Claims19
A stress absorbing composite for road repair that comprises:
- a) a low stiffness geotextile with a stiffness less than 1500 lbs/inch at 5% strain;
- b) a viscoelastic material disposed over the low stiffness geotextile;
- and
- c) a high stiffness geotextile with a stiffness greater than 4000 lbs/inch at 5% strain disposed over the viscoelastic material.
A method of retarding reflective cracking from a distressed and cracked road surface to a newly applied overlay of asphalt concrete, the method comprising the steps of:
- a) positioning a composite comprising a low stiffness geotextile with a stiffness less than 1500 lbs/inch at 5% strain;.
- a viscoelastic material disposed over the low stiffness geotextile;
- and
- a high stiffness geotextile with a stiffness greater than 4000 lbs/inch at 5% strain disposed over the viscoelastic material to be laid over the road surface with the low stiffness geotextile positioned adjacent to the road surface;
- and
- b) applying an asphalt concrete overlay over the composite.
A repaired road that comprises:
- a) a distressed and cracked road surface;
- b) a composite comprising a low stiffness geotextile with a stiffness less than 1500 lbs/inch at 5% strain;
- a viscoelastic material disposed over the low stiffness geotextile;
- and
- a high stiffness geotextile with a stiffness greater than 4000 lbs/inch at 5% strain disposed over the viscoelastic material to be laid over the road surface with the low stiffness geotextile positioned adjacent to the road surface;
- and
- c) an asphalt concrete overlay disposed over the composite.
A method of retarding reflective cracking from a distressed and cracked road surface to a newly applied overlay of asphalt concrete, the method comprising the steps of:
- a) positioning a low stiffness geotextile over the road surface;
- b) applying a viscoelastic material over the low stiffness geotextile;
- c) positioning a high stiffness geotextile over the viscoeleastic material;
- and
- d) applying asphalt concrete over the high stiffness geotextile.
Dependencies are inferred from the claim text.