Welcome page Design Guide General Guidance Pavement Types Materials Design Factors Mix Design Structural Design Construction Pavement Evaluation Maintenance and Rehabilitation


Rehabilitation can be defined as (ITS, 2000):

" Measures to improve, strengthen or salvage existing deficient pavements to continue service with only routine maintenance. Deficient pavements exhibit distress in excess of what can be handled through routine maintenance."

In other words, although maintenance can slow the rate of pavement deterioration, it cannot stop it. Therefore eventually the effects of deterioration need to be reversed by adding or replacing material in the existing pavement structure. This is called rehabilitation. Rehabilitation options depend upon local conditions and pavement distress types but typically include:

Structural Overlays

Structural overlays are used to increase pavement structural capacity. Therefore, they are considered rehabilitation, although they typically have some maintenance-type benefits as well. Asphalt concrete structural overlay design can be broadly categorized into the following (modified after Monismith and Finn, 1984):

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