United States Department of Transportation
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Avoiding Early Failure of Intersection Pavements
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1989-11-01
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[PDF-3.42 MB]
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Edition:Final: September 1987 - October 1989
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Abstract:Intersection approach pavements often experience extreme forms of distress long before the tangent segments of the same pavement and long before the design life of the pavement is attained. Field and laboratory investigations of asphalt concrete intersection approach pavements were conducted to determine ne the primary causes of premature failure and 5uggest changes in pavement design and construction procedures that can be used to prolong intersection pavement service life. The primary mode of failure of the intersections studied was rutting with shoving in some cases. The leading materials related cause of pavement failure was asphalt content in excess of the designed value. Most of the mixtures studied contained relatively high percentages of uncrushed sand and low voids in the mineral aggregate. Modifications in materials specifications, laboratory test techniques design procedures, and construction methods are suggested to provide a margin of safety to minimize early failures. The potential for significant economic benefits appears promising when intersection approaches are designed and constructed to accommodate the special stresses to which they are subjected.
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