Problem The high volume of aircraft departing and landing at San Francisco International Airport caused portions of the 10R-28L asphalt runway to prematurely reach the end of their functional life. The results of a remaining life pavement analysis (FAARFIELD) indicated that action was necessary to restore the pavement to an acceptable remaining lifespan. URETEK was hired to resolve this pavement preservation problem. Analysis URETEK used the results from the FAARFIELD analysis and accompanying geotechnical field testing to develop a repair solution. A traditional, full-depth repair was impractical because it would have required shutting down the runway for an extended length of time. The URETEK Deep Injection ® (UDI) process promised the San Francisco Airport engineers a fast

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