PAVEMENT ROUGHNESS ON EXPANSIVE CLAYS.
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The roughness patterns of pavements on expansive-clay subgrades were measured by using the General Motors profilometer on 20 sections of pavement in Texas. The roughness patterns are analyzed by means of two methods: the Fast Fourier Transform and a technique that reproduces a rod-and-level survey. An equation that can predict loss of pavement serviceability index was also determined by regression analysis to depend on the same pavement, climate, and soil properties. An example of the use of this equation in the prediction of the performance of a pavement on expansive clay is given, and its implications for pavement design are discussed.
Transportation Research Record
author list (cited authors)
Velasco, M. O., & Lytton, R. L.
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