State-of-the-Practice: Rubblization of Airfield Pavements.

Rubblization and repaving with HMA is quickly becoming the PCCP rehabilitation technique of choice for old deteriorated PCCP airfields. In the pastseven years, well over one million square meters of PCCP had been rubblized, leaving in place a stiff unbound granular base layer ideal for new HMApavements. The majority of airfield rubblization projects have taken place in the last five years. These projects range from heavy load military airfields, handling some of our largest aircraft, to local general aviation airfields that handle the smallest aircraft. These projects also cover a wide range geographically, from Florida to Washington (state) and from Tennessee to upstate New York. The Wright-Patterson AFB project, in 2002, demonstrated that the Resonant Pavement Breaker can successfully rubblize up to 26-inches of PCCP, resulting in aggregate particles smaller than 12 inches throughout the concrete thickness. The Selfridge ANGB project demonstrated that the Guillotine Breaker, followed by a Multiple Head Breaker, can successfully rubblize up to 21-inches of PCCP. With the FAA's recently published guidance and specification for rubblizing airfield PCCP (EB 66), the use of rubblization should continue to grow on both civilian and military airfields. The same benefits that highway agencies realize with rubblization are being recognized by airfield agencies. This is vital, as our airfield pavement infrastructure, much of which is PCCP, continues to age beyond the point of restoration. For the covering abstract see ITRD E139491.