Abstract

With a good knowledge of the existing surfacing service life, it is possible to evaluate the effect of pavement strengthening. By comparing the surfacing service life before and after the pavement strengthening, the effect of the strengthening can be evaluated in a very precise manner against both technical and economical criteria. The paper describes the background for the change in procedure for assessing pavement strengthening requirements and the method for designing the strengthening. On the basis of this experience a new method for pavement strengthening was introduced in the 2005 revision of the Norwegian Materials and Pavement Design Manual. The need for strengthening is no longer established on the basis of measurements with FWD or other indirect methods, but only to the recorded service life of the surfacing.

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