EXTENDING PAVEMENT LIFE WITH ASPHALT OVERLAYS

This booklet, which notes that the maintenance and upgrading of the existing road networks is one of the compelling requirements of the U.S. today, demonstrates how asphalt overlays can strengthen and upgrade pavements as traffic increases and as funds become available. Brief details are outlined of the following projects: Alabama 1968 (overlaid with 4 1/2 to 5 inches hot-mix asphalt over old concrete pavement; no maintenance to date, 1976); California 1970 (overlaid with 3 inches hot-mix asphalt and 1/2 inch open-graded plant mix seal; no maintenance to date, 1976); California 1969 (overlaid with 7 1/2 inches hot-mix asphalt at the center tapering to 3 inches at the edge, 75 feet from the center line; no maintenance to date); California 1960 (overlaid with 3 inches hot-mix asphalt; no maintenance up to 1975); Florida 1962 (overlaid with 5 inches hot-mix asphalt over old concrete pavement; minimal reflection cracking and maintenance to date, 1976); Iowa 1963 (overlaid with 2 inches hot-mix asphalt over old asphalt pavement; minimal maintenance to date, 1976); Maryland 1969 (overlaid with 4 inches hot mix asphalt over surface-treated gravel roadbed; minimal maintenance to date, 1976); Maryland 1960 (overlaid with 6 inches hot-mix asphalt over old concrete pavement; no maintenance to date, 1976); Mississippi 1962 (overlaid with 2 1/2 inches hot-mix asphalt); Washington 1964 (overlaid with 3 inches hot-mix asphalt; little or no maintenance to date, 1976).

• Corporate Authors:

  Asphalt Institute

  2696 Research Park Drive
  Lexington, KY  United States  40511-8480
• Publication Date: 1977-3

Media Info

• Features: Photos;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Bituminous overlays; Concrete pavements; Gravel roads; Hot mix asphalt; Modernization; Open graded aggregates; Pavement maintenance; Pavements; Plant mix; Seals (Devices); Securing and joining equipment; Service life
• Old TRIS Terms: Pavement life
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00163576
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM