Refinement of the Bond Strength Procedure & Investigation of a Specification
Record Type: DOT
Many of the past studies on bond strength concentrated on only one depth to interface and a couple of tack coats. Research on the affect of aging and traffic on bond strength has also been minimal. Texture effects on bond strength have not be investigated as extensively as tack coat rate and type. Additional research on texture effects should be explored. The previous National Center for Asphalt Technology (NCAT) research indicated that milling aids in developing strong bond. There has been some research indicated that milling aids in developing strong bond. There has been some research concentrating on stress distributions within pavement layers and at an interface. The modeling techniques employed tend to vary. The proposed research will address some of these areas that have not been thoroughly addressed. Varying interface depths, aging, and exposed to traffic will be evaluated in the current research. One phase of the project will investigate the relationship between bond strengths of cores extracted immediately after construction and some time after. Another phase will use a modeling technique to better understand the stresses occurring at the interface and in the uppermost lift. An additional phase will be laboratory based evaluating tack coat types and applications with respect to bond strength.
Start date: 2007/8/29
End date: 2009/9/30
Status: Active
Contract/Grant Number: 930-715
Total Dollars: 265000
Source Organization: Alabama Department of Transportation
Date Added: 10/23/2007
Index Terms: Bond strength (Materials), Tack coats, Texture, Specifications, Depth, Aging (Materials), Traffic loads, Cores (Specimens), Research projects,
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Auburn University
National Center for Asphalt Technology
310 Sanford Hall
Auburn, Alabama 36849-5131
USA
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West, Randy
Phone: (334) 844-6228
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