A new technology called a sand anti-fracture (SAF) layer was proposed as an efficient and cost effective method of pavement rehabilitation. The SAF layer is a fine aggregate graded asphalt mixture using highly polymerized asphalt cement and is placed between a Portland Cement Concrete (PCC) pavement and an asphalt overlay. The purpose of the SAF layer is to retard reflective cracking in asphalt overlays over PCC pavements and reduce PCC pavement repair costs. Eight test sections were constructed in summer 1998 on Route I-29 in Holt County to evaluate the SAF layer. The test sections contain two degrees of pavement repair, two different overlay thicknesses, two different grades of asphalt cement, and sections incorporating the recommended one-inch SAF layer. These test sections will be compared to each other to evaluate the performance of the SAF layer, as well as the Superpave overlay design and to determine which provides the greatest benefit-to-cost ratio. This report contains information from beginning of the project until the end of 1999. Visual distress surveys and falling weight deflectometer testing were conducted prior to construction and on a bi-yearly basis. The conclusions and recommendations presented are preliminary and are subject to change as additional data are obtained.
The sand anti-fracture (SAF) technology was implemented on U.S. 36 in DeKalb County, Missouri, during the summer of 2000. The SAF layer is a fine aggr...
As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation(ADOT) constructed 11 Specific Pavement Study‐...
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United States Department of Transportation
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