SURVEILLANCE OF NAS ALAMEDA RUNWAY PAVEMENT.
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
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A high type asphaltic concrete overlay of a badly deteriorated runway at NAS Alameda, California, is being monitored to determine changes in properties with time. Changes in the compressive strength of cores taken from the pavement and changes in the penetration of the asphalt cement binder taken from these cores during the first three years following construction are presented. Though the data are somewhat scattered, it is apparent that the compressive strength is increasing and the penetration is decreasing. A prediction is made of values of these quentities expected seven years after onstruction. Similar tests were made on cores and on asphalt taken from the underlying pavement. No trends are apparent from these data, indicating that the older pavement is in a terminal condition. That is, it is not expected that substantial changes in the pavement properties will take place in the future. Author