Evaluation of Bonded Concrete Overlays on Asphalt Pavements

Project Details
STATE

AASHTO

SOURCE

TRB

START DATE

02/26/18

END DATE

02/26/20

RESEARCHERS

Harrigan, Edward; Pierce, Linda

SPONSORS

AASHTO; FHA

KEYWORDS

Concrete overlays; Cracking of concrete pavements; Durability; Life cycle costing; Mechanistic-empirical pavement design; Pavement maintenance; Rutting; Service life; Thickness

Project description

Bonded concrete overlays on asphalt (BCOA) pavements are a fast-growing pavement preservation and rehabilitation treatment in the United States. They have demonstrated their effectiveness as solutions for correcting areas with excessive rutting and shoving caused by slow, heavy loads, such as at intersections, as well as for a longer term overlay option on regular mainline pavements. Some highway agencies are reluctant to use BCOA because of a lack of experience and information. Thus, research is needed to determine expected BCOA performance. Other aspects of BCOA such as construction practices ("do's and don'ts") and maintenance, repair, and rehabilitation requirements and procedures also need attention. The objectives of this research are to: (1) investigate factors that may impact BCOA performance, including, but not limited to, design procedures, specifications, mix design proportioning, construction practices, and maintenance and repair techniques; (2) document in-service BCOA performance through a literature review and survey; (3) conduct field surveys of selected BCOA projects; (4) develop representative performance prediction curves suitable for use in BCOA design selection based on the documented performance of a range of BCOA projects; and (5) compare actual versus predicted BCOA performance using current design procedures.
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